CN107294421B - Double wave shape wave negative poisson's ratio structure based on dielectric type electroactive polymer - Google Patents
Double wave shape wave negative poisson's ratio structure based on dielectric type electroactive polymer Download PDFInfo
- Publication number
- CN107294421B CN107294421B CN201710422431.0A CN201710422431A CN107294421B CN 107294421 B CN107294421 B CN 107294421B CN 201710422431 A CN201710422431 A CN 201710422431A CN 107294421 B CN107294421 B CN 107294421B
- Authority
- CN
- China
- Prior art keywords
- arc section
- tendon
- bone
- negative poisson
- electroactive polymer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 229920001746 electroactive polymer Polymers 0.000 title claims abstract description 68
- 210000002435 tendon Anatomy 0.000 claims abstract description 78
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 64
- 230000001413 cellular effect Effects 0.000 claims abstract description 54
- 239000000463 material Substances 0.000 claims abstract description 29
- 229920002595 Dielectric elastomer Polymers 0.000 claims abstract description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 238000004026 adhesive bonding Methods 0.000 claims description 4
- 229920001971 elastomer Polymers 0.000 claims description 4
- 239000000806 elastomer Substances 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 239000002041 carbon nanotube Substances 0.000 claims description 3
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
- 239000003792 electrolyte Substances 0.000 claims description 3
- 239000002657 fibrous material Substances 0.000 claims description 3
- 229910021389 graphene Inorganic materials 0.000 claims description 3
- 239000000017 hydrogel Substances 0.000 claims description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 3
- 229920003225 polyurethane elastomer Polymers 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 235000008331 Pinus X rigitaeda Nutrition 0.000 claims 1
- 235000011613 Pinus brutia Nutrition 0.000 claims 1
- 241000018646 Pinus brutia Species 0.000 claims 1
- 230000001172 regenerating effect Effects 0.000 abstract description 10
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 230000006870 function Effects 0.000 abstract description 5
- 230000003068 static effect Effects 0.000 abstract 1
- 230000005684 electric field Effects 0.000 description 21
- 230000008859 change Effects 0.000 description 12
- 238000013016 damping Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 11
- 238000006073 displacement reaction Methods 0.000 description 8
- 239000003990 capacitor Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 230000005611 electricity Effects 0.000 description 5
- 230000005284 excitation Effects 0.000 description 5
- 238000005457 optimization Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- CVOFKRWYWCSDMA-UHFFFAOYSA-N 2-chloro-n-(2,6-diethylphenyl)-n-(methoxymethyl)acetamide;2,6-dinitro-n,n-dipropyl-4-(trifluoromethyl)aniline Chemical compound CCC1=CC=CC(CC)=C1N(COC)C(=O)CCl.CCCN(CCC)C1=C([N+]([O-])=O)C=C(C(F)(F)F)C=C1[N+]([O-])=O CVOFKRWYWCSDMA-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 230000005662 electromechanics Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007786 learning performance Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 239000003471 mutagenic agent Substances 0.000 description 1
- 231100000707 mutagenic chemical Toxicity 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
- H02N2/04—Constructional details
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
Abstract
The double wave shape wave negative poisson's ratio structure based on dielectric type electroactive polymer that the invention discloses a kind of, by double wave shape wave negative poisson's ratio cellular array, which is made of waveform tendon (101-105) and bone (106-110) respectively.Tendon is made of dielectric type electroactive polymer, is a Sandwich structure, wherein sandwich material is dielectric elastomer, and two sides are flexible electrode, and the Young's modulus of bone is bigger than tendon materials.The flexible electrode of tendon upper and lower surface is connect with the positive and negative anodes of high-voltage DC power supply 111 respectively, and voltage and access open-circuit condition are adjustable.Double wave shape wave negative poisson's ratio cellular is subjected to array, may make up double wave shape wave negative poisson's ratio structure.Since the machine performance and static state of dielectric type electroactive polymer intercouple, the functions such as structure real-time variable, actuating, energy regenerating and the sensing of double wave shape wave negative poisson's ratio structure are realized in the mutual conversion being able to achieve between mechanical energy and electric energy.
Description
Technical field
The present invention relates to a kind of double wave shape wave negative poisson's ratio structures, more particularly to one kind to be based on dielectric type electroactive polymer
Double wave shape wave negative poisson's ratio structure.
Background technique
Negative poisson's ratio (Negative Poisson ' s Ratio, NPR) structure is a kind of new with unique mechanical properties
Type structure, be pressurized when can occur laterally shrink rather than lateral expansion, therefore material can concentrate on automatically at load so as to
It is enough more effectively to bear load, the rigidity of structure also can non-linear increase as the load increases, therefore negative poisson's ratio structure
The mechanical property of material can more fully be utilized.The mechanical characteristic of the mechanical property of negative poisson's ratio structure and used material
Closely related with structural parameters, by certain material and parameter designing, negative poisson's ratio structure can have excellent suction simultaneously
Energy efficiency and damping capacity, can be realized simultaneously the effect of elastic element and damping element to a certain extent.However work as material
When determining with structural parameters, the basic mechanical performances such as rigidity, damping of negative poisson's ratio structure also determine therewith, can not meet simultaneously
Best performance under different loads and incentive action.Such as when being applied to energy-absorbing and vibration-proof structure, if the load applied is smaller,
The deformation of negative poisson's ratio structure is smaller to be unable to reach maximum impulse stroke, so that peak force can not reduce；And when load is larger
When, the deformation of negative poisson's ratio structure is very big and has been more than range, then peak force also can significantly increase later.Cause
There is also the spaces further increased for the energy-absorbing and damping property of this negative poisson's ratio structure.And if the power of negative poisson's ratio structure
The range of structure can be fully utilized then under different loads operating condition by learning performance real-time variable, guarantee energy absorbing efficiency
In the case where can utmostly reduce peak force, therefore the negative poisson's ratio structure for designing a kind of mechanical property real-time variable has
Important meaning.
Electroactive polymer be it is a kind of can produce under electric field and voltage drive be significantly displaced and load change it is new
Type flexibility function material, in addition, its displacement and the change of load condition can also cause the significant changes of electric field and voltage, therefore electricity
Load, displacement, electric field and the voltage status of living polymer intercouple, and the change of any state will cause it
The variation of his some parameter state or certain several parameter state.Electroactive polymer can be divided mainly into ionic and electric field type two
Major class: ionic electroactive polymer is the conversion realized between electric energy and mechanical energy using chemical energy as transition, its advantage is that
Driving voltage is low and deformation is big, but responds the energy absorbing component low compared with slow and energy density, therefore, it is difficult to be suitable under dynamic operation condition.
Electric field type electroactive polymer can be further divided into piezo-electric type and dielectric type: piezo-electric type electroactive polymer material under electric field excitation
Material itself can generate electroluminescent stress, the conversion being directly realized by between electric energy and mechanical energy, but it is lower to deform smaller and efficiency；Dielectric
Type electroactive polymer realizes energy conversion by the statcoulomb power that two lateral electrodes generate under electric field excitation, its main feature is that ringing
Should it is fast, deformation big (maximum area strain is up to 380%), energy density is larger and energy conversion efficiency is very high (up to
90%) These characteristics, are based on, dielectric type electroactive polymer is generally also known as artificial muscle.Dielectric type electroactive polymer
Another advantage be that cost is cheap, therefore is expected to be widely used.Dielectric type electroactive polymer is primarily subjected to stretch
Load and varying less in thickness direction, therefore certain support construction is usually required when application is actuator, sensor
Its stretcher strain is changed into the movement along a certain axis.Dielectric type electroactive polymer is applied in negative poisson's ratio structure
It is then a kind of completely new thinking.
Summary of the invention
The technical problem to be solved by the present invention is to provide a kind of based on Jie for defect involved in background technique
The double wave shape wave negative poisson's ratio structure of electric type electroactive polymer realizes double wave wave by the application of dielectric type electroactive polymer
Shape negative poisson's ratio structurally variable makes double wave shape wave negative poisson's ratio structure have different mechanical properties under different voltage drives,
And it can be achieved at the same time the integrated of elastic element, damping element, sensor element, actuator component and energy regenerating element
Change, electronization, information-based and intelligence.
The present invention uses following technical scheme to solve above-mentioned technical problem:
Double wave shape wave negative poisson's ratio structure based on dielectric type electroactive polymer, by double wave shape wave negative poisson's ratio cellular battle array
It arranges；
The double wave shape wave negative poisson's ratio cellular includes bone and tendon, and the tendon is arranged on bone, and the bone
Bone and tendon are in U-shape curve-like；
The bone includes the first arc section being successively smoothly connected, first straight line section, the second arc section, with tendon
Two straightways and third arc section；
First arc section of the tendon, the first arc section of the direction of third arc section and bone, third arc section
Towards identical；Second arc section of the direction and bone of the second arc section of the tendon towards identical；The of the bone
The direction of second arc section of one arc section, the direction of third arc section and bone is opposite；
The head end of first arc section of the head end and tendon of the first arc section of the bone is connected, the third circular arc of bone
The end of section is connected with the end of the third arc section of tendon；
The fillet of first arc section upper surface of the radius of corner and bone of the first arc section lower surface of the tendon half
Diameter is identical, the radius of corner phase of the third arc section upper surface of the radius of corner and bone of the third arc section lower surface of tendon
Together；
The Young's modulus of the bone is greater than the Young's modulus of tendon；
The tendon materials use dielectric type electroactive polymer, and two flank external voltage.
As the present invention is based on the further sides of optimization of the double wave shape wave negative poisson's ratio structure of dielectric type electroactive polymer
Case, the bone are made of any one in steel, alloy material, high molecular polymer, high tensile strength fibrous material.
As the present invention is based on the further sides of optimization of the double wave shape wave negative poisson's ratio structure of dielectric type electroactive polymer
Case, the tendon are in Sandwich structure, wherein the sandwich material of tendon is dielectric elastomer, and sandwich material two sides are flexible electrical
Pole, and the Young's modulus of two sides flexible electrode is less than the Young's modulus of dielectric elastomer.
As the present invention is based on the further sides of optimization of the double wave shape wave negative poisson's ratio structure of dielectric type electroactive polymer
Case, the sandwich material is using any one in polyurethane elastomer, silica gel or acrylate, and two sides flexible electrode is using electricity
It is pole carbon dust, silver paste, metallic film, carbon rouge, carbon nanotube, hydrogel electrolyte, graphene, any one in conductive elastomer
Kind.
As the present invention is based on the further sides of optimization of the double wave shape wave negative poisson's ratio structure of dielectric type electroactive polymer
Case, the end of the head end of the first arc section of the head end and tendon of the first arc section of the bone, the third arc section of bone
It is attached by way of gluing with the end of the third arc section of tendon.
As the present invention is based on the further sides of optimization of the double wave shape wave negative poisson's ratio structure of dielectric type electroactive polymer
Case, the head end frame of the first arc section of the tendon is on the head end of the first arc section of bone, the third arc section of tendon
Tip shelf is on the end of the third arc section of bone.
The invention adopts the above technical scheme compared with prior art, has following technical effect that
Dielectric type electroactive polymer is applied in negative poisson's ratio structure, on the one hand, due to the electroactive polymerization of dielectric type
Object can generate certain displacement or load change under electric field or voltage drive, therefore:
(1) when negative poisson's ratio structure is as passive components, displacement or the variation of load can significantly affect negative poisson's ratio knot
The mechanical property of the structural parameters of structure, double wave shape wave negative poisson's ratio structure can pass through different electricity according to load and excitation situation
Field and voltage drive carry out certain active control, to significantly improve negative poisson's ratio structure in different load and incentive action
Under energy-absorbing, damping property；
(2) when negative poisson's ratio structure is as driving part, displacement or the variation of load can be as the energy of mechanical system
Amount output, to play the role of actuator.
On the other hand, certain electric field or electricity can be generated under displacement or load effect due to dielectric type electroactive polymer
Buckling, therefore:
(1) when negative poisson's ratio structure is as passive components, measurement dielectric type electroactive polymer two sides electricity can be passed through
The electric field and voltage change of pole calculate load condition, therefore double wave shape wave negative poisson's ratio structure itself can be used as sensor
Element；
(2) when negative poisson's ratio structure is as driving part, machine may be implemented by the collection to electric field and voltage change
The function of tool energy regenerating all has positive meaning for reducing energy loss, realization energy conservation and environmental protection etc..
The tendon of two-dimentional double wave shape wave negative poisson's ratio cellular is wavy, cuts with the electroactive polymer actuator of cone
Face is more similar.In addition, the bone in cellular provides a support construction for dielectric type electroactive polymer, it is past by cellular
The duplication of different directions enables to the electomechanical response of a cellular that can be periodically superimposed, to be able to satisfy bigger
The structural requirement of scale, and improve electromechanical conversion efficiency.
Under univariate input, double wave shape wave negative poisson's ratio structure mainly have mechanically deform, charging, Mechanical Driven and
The mutually independent electromechanical state of electric discharge etc. four, can realize energy-obsorbing and damping and sensing, variation rigidity variable damping, driving and energy respectively
The functions such as amount recycling, this four states constitute an electromechanical circulation.It is double during some specifically mechanically and electrically mutagens shape
It is functional that waveform negative poisson's ratio structure can be achieved at the same time above-mentioned institute, and realizes multi-functional coupling.
Detailed description of the invention
Fig. 1 is the two-dimensional section schematic diagram of double wave shape wave negative poisson's ratio cellular in the present invention；
Fig. 2 is the structural parameters schematic diagram of the two-dimensional section of double wave shape wave negative poisson's ratio cellular in the present invention；
Fig. 3 is a kind of schematic three dimensional views of double wave shape wave negative poisson's ratio cellular in the present invention；
Fig. 4 (A), Fig. 4 (B) are the dielectric type electroactive polymer tendon materials in double wave shape wave negative poisson's ratio cellular respectively
Structural schematic diagram and electromechanical deformations schematic diagram；
Fig. 5 is a kind of two-dimensional section and deformation schematic diagram of double wave shape wave negative poisson's ratio structure of the present invention；
Fig. 6 is a kind of schematic three dimensional views of double wave shape wave negative poisson's ratio structure of the present invention；
Fig. 7 is the relationship of mechanical force and electric field force in double wave shape wave negative poisson's ratio structure；
Fig. 8 is voltage and charge of the double wave shape wave negative poisson's ratio structure in the electromechanical circulation of typical case for being used as energy regenerating element
Variation diagram；
Fig. 9 is energy variation of the double wave shape wave negative poisson's ratio structure in the electromechanical circulation of typical case for being used as energy regenerating element
Figure.
Specific embodiment
Dielectric type electroactive polymer is applied to the partial tendon in double wave shape wave negative poisson's ratio structure by the present invention, can
The real-time variable for realizing double wave shape wave negative poisson's ratio structure makes it have different mechanics under different voltage or electric field excitation
Performance, and can be achieved at the same time elastic element, damping element, sensor element, actuator component and energy regenerating element
It is integrated, electronic, information-based and intelligent.
A specific embodiment of the invention is further detailed with reference to the accompanying drawing.
The double wave shape wave negative poisson's ratio structure based on dielectric type electroactive polymer that the invention discloses a kind of, by double wave wave
Shape negative poisson's ratio cellular array forms；
The double wave shape wave negative poisson's ratio cellular includes bone and tendon, and the tendon is arranged on bone, and the bone
Bone and tendon are in U-shape curve-like；
The bone includes the first arc section being successively smoothly connected, first straight line section, the second arc section, with tendon
Two straightways and third arc section；
First arc section of the tendon, the first arc section of the direction of third arc section and bone, third arc section
Towards identical；Second arc section of the direction and bone of the second arc section of the tendon towards identical；The of the bone
The direction of second arc section of one arc section, the direction of third arc section and bone is opposite；
The head end of first arc section of the head end and tendon of the first arc section of the bone is connected, the third circular arc of bone
The end of section is connected with the end of the third arc section of tendon；
The fillet of first arc section upper surface of the radius of corner and bone of the first arc section lower surface of the tendon half
Diameter is identical, the radius of corner phase of the third arc section upper surface of the radius of corner and bone of the third arc section lower surface of tendon
Together；
The Young's modulus of the bone is greater than the Young's modulus of tendon；
The tendon materials use dielectric type electroactive polymer, and two flank external voltage.
Fig. 1 illustrates the two-dimensional section schematic diagram of double wave shape wave negative poisson's ratio cellular, and partial tendon is mainly divided into 5 areas
Domain, wherein 101,103 and 105 regions are arc section, 102 and 104 regions are straightway, and the center line phase of adjacent area
It cuts；Bone portion is also mainly divided into 5 regions, wherein 106,108 and 110 regions are arc section, 107 and 109 regions are straight
Line segment, and the center line of adjacent area is tangent.
Inside double wave shape wave negative poisson's ratio cellular, tendon is connect in left and right ends respectively with bone, wherein 101 sections with
106 sections of connections, 105 sections connect with 110 sections.Connection type can be by the way of gluing, can also be using the side directly contacted
Formula, then under the effect of vertical compressive load on 101 and 105 sections of 106 and 110 sections for being tightly attached to bone of cellular tendon.101 sections
Lower surface is tightly bonded with 106 sections of upper surfaces, then 101 sections of lower surface radiuss of corner keep one with 106 sections of upper surface radiuss of corner
It causes.Similarly, 105 sections of lower surfaces are tightly bonded with 110 sections of upper surfaces, then 105 sections of lower surface radiuss of corner and 110 sections of upper surface circles
Angular radius is consistent.
The length of tendon bevel edge 102 and 104 and bone bevel edge 107 and 109 in double wave shape wave negative poisson's ratio cellular is all
It can become 0, when all becoming 0, tendon and bone are all made of arc section；In addition, tendon arc section 101,103 and
105 and the radius of bone arc section 106,108 and 110 can also become 0, when all becoming 0, tendon and bone all by
Oblique line section is constituted.
The flexible electrode of the upper and lower surface of partial tendon dielectric type electroactive polymer in double wave shape wave negative poisson's ratio cellular
It is connect respectively with the positive and negative anodes of high-voltage DC power supply 111, according to specific needs, the voltage of power supply can be adjusted, and can be connect
On-off opens the circuit.
Fig. 2 illustrates the structural parameters schematic diagram of the two-dimensional section of double wave shape wave negative poisson's ratio cellular, in which: the thickness of bone
Degree is tα, tendon with a thickness of tβ；Angle between bone bevel edge 107 and 109 is α, the angle between tendon bevel edge 102 and 104
For β, 0 β≤180 ° < α < are known by geometrical relationship；The radius of 106 sections of center lines of bone is rα1, the radius of 108 sections of center lines is
rα2, the radius of 110 sections of center lines is rα3；The radius of 101 sections of center lines of tendon is rβ1, the radius of 103 sections of center lines is rβ2, 105
The radius of section center line is rβ3；The effective height of cellular is hc, it is bone 108 sections of lower surfaces bottom end to 103 sections of upper surfaces of tendon
The distance between bottom end indicates that each cellular is the height that overall structure provides；The effective width of cellular is wc, it is cellular
Left end indicates that each cellular is the width that overall structure provides the distance between to right end；High-voltage DC power supply
Voltage is Φ.
R is known by geometrical relationshipβ1=rα1+(tα+tβ)/2；rβ3=rα3+(tα+tβ)/2.If rβ2' it is cellular flesh on the downside of the cellular
The radius of 103 sections of center lines of tendon, then have rβ2'=rα2+(tα+tβ)/2。
Bone portion in double wave shape wave negative poisson's ratio cellular is due to playing structural support effect, Young's modulus ratio
The Young's modulus of tendon is big, and all kinds of steel, alloy material, high molecular polymer, all kinds of high tensile strength fibrous materials etc. can be used.
Fig. 3 illustrates a kind of schematic three dimensional views of double wave shape wave negative poisson's ratio cellular, is double wave shape wave negative poisson's ratio member
The two-dimensional section of born of the same parents stretches along the z-axis direction, and depth along the z-axis direction is L.301,302 and 303 constitute tendon in figure
Layer, wherein 301 and 303 be respectively the flexible electrode of dielectric type electroactive polymer upper and lower surface, 302 is electroactive poly- for dielectric type
Close the dielectric elastomer in object.In addition, 304 be skeletal structure, 305 be the DC power supply with switch, and the two poles of the earth are connected to
On 301 and 303.
The dielectric type electroactive polymer of the partial tendon of double wave shape wave negative poisson's ratio cellular is a Sandwich structure, wherein
Sandwich material is dielectric elastomer, and two sides are flexible electrode, wherein Young of the Young's modulus of flexible electrode than dielectric elastomer
Modulus is much smaller, and in the case where meeting above-mentioned condition, the material of dielectric elastomer and flexible electrode can be selected arbitrarily.
Fig. 4 (A) illustrates dielectric type electroactive polymer schematic diagram, is a Sandwich structure, and wherein sandwich material is to be situated between
The materials such as polyurethane elastomer, silica gel, acrylate can be used in electric elastomer.Upper and lower two sides are flexible electrode, and electrode can be used
The materials such as carbon dust, silver paste, metallic film, carbon rouge, carbon nanotube, hydrogel electrolyte, graphene and conductive elastomer.Dielectric type
Electroactive polymer is in original state, long L1, wide L2, thick T.The Young mould of flexible electrode in dielectric type electroactive polymer material
Amount should be more much smaller than dielectric elastomer, to reduce its influence to dielectric type electroactive polymer mechanical property.
Fig. 4 (B) illustrates the electromechanical deformations schematic diagram of dielectric type electroactive polymer, upper and lower two sides flexible electrode respectively with
One voltage is that the two poles of the earth of the high-voltage DC power supply of Φ are connected, and dielectric type electroactive polymer is similar to a capacitor, electric current at this time
Dielectric elastomer can not be passed through, therefore has accumulated ± Q charge respectively at the flexible electrode of two sides up and down, electrostatic effect is generated and is formed
Coulomb force is decreased to t to compress dielectric elastomer and be allowed to thickness, and length and width increases to l respectively1And l2, dielectric at this time
Stress of the type electroactive polymer in three directions is respectively P1、P2And P3.Φ, Q, P and t are to intercouple in the system
State parameter, the change of any state will affect other three state parameters.
Fig. 5 illustrates a kind of two-dimensional section and deformation schematic diagram of double wave shape wave negative poisson's ratio structure, wherein each layer
The double wave shape wave negative poisson's ratio cellular number for including in structure is defined as lateral cellular number, i.e., cellular number in the x-direction；It is whole double
The number of plies for including in waveform negative poisson's ratio structure is defined as longitudinal cellular number, i.e., cellular number in the y-direction.The cross of example in figure
It is 5 to cellular number, longitudinal cellular number is 10.When double wave shape wave negative poisson's ratio structure bears the compressive load in the direction y, in x
Direction can shrink deformation, and Negative poisson's ratio is presented.For clearer displaying double wave shape wave negative poisson's ratio structure, in figure
Power-supply system is omitted.
In double wave shape wave negative poisson's ratio structure, the connection type of a certain cellular and its left side cellular are as follows: 101 Duan Yuqi are left
105 sections of side cellular are connected directly, and are the different zones of one integral piece of material；106 sections directly connect with its left side 110 sections of cellular
It connects, is the different zones of one integral piece of material.The cellular is identical as its right side connection type of cellular.
In double wave shape wave negative poisson's ratio structure, the connection type of a certain cellular and its downside cellular are as follows: 108 sections of lower surfaces
It is tightly bonded with 103 sections of upper surfaces of its downside cellular, then 103 Duan Shangbiao of 108 sections of lower surface radiuss of corner and downside cellular
Face radius of corner is consistent.It can be attached by the way of gluing between the two, it can also be using the side directly contacted
Formula, then the 108 of the cellular section can be tightly attached on 103 sections of downside cellular under the effect of vertical load.The cellular and its upside member
The connection type of born of the same parents is identical.
Fig. 6 illustrates a kind of schematic three dimensional views of double wave shape wave negative poisson's ratio structure, is double wave shape wave negative poisson's ratio knot
The two-dimensional section of structure stretches along the z-axis direction, and depth along the z-axis direction is L.In order to which clearer displaying double wave shape wave is negative
Power-supply system is omitted in figure in Poisson's ratio structure.
Double wave shape wave negative poisson's ratio structure can also be other shapes, for example by double wave shape wave negative poisson's ratio cellular along different
Cylindrical structure made of the circular array of direction etc..
Double wave shape wave negative poisson's ratio structure can be used as buffering and damping element, be by the non-linear of negative poisson's ratio structure itself
What the nonlinear mechanics characteristic of mechanical characteristic and elastic material was determined.
The principle of the mechanical property real-time variable of double wave shape wave negative poisson's ratio structure are as follows: as the supply voltage Φ of structure connection
When increase, the charge accumulated in two lateral electrode of dielectric type electroactive polymer of tendon layer increases, the statcoulomb power of generation
It increases with it, reduces the thickness of dielectric type electroactive polymer, and increase its area, this will reduce tendon angle β, change
The structural parameters of double wave shape wave negative poisson's ratio structure；On the other hand, when supply voltage Φ increases, the Stiffness Drop of tendon materials
It is low, change the material property of double wave shape wave negative poisson's ratio structure.Therefore double wave shape wave negative poisson's ratio structure is in different electric excitations
There is down different mechanical properties.
Fig. 7 illustrates the relationship of mechanical force and electric field force in double wave shape wave negative poisson's ratio structure.In equilibrium state, electric field force
It is equal with mechanical force.When voltage, charge and the capacitor of structure dielectric type electroactive polymer change and make electric field
When power is more than mechanical force, as shown by point 1, in order to reach equilbrium position, then mechanical force persistently increases, dielectric type electroactive polymer
Thickness reduce and area increases, be finally reached the balance of electric field force and mechanical force, the point of arrival 2, in the process, part electric energy
Be converted to mechanical energy.On the other hand, when the load of structure and deformation change, and mechanical force is made to be more than electric field force, such as point
Shown in 3, in order to reach equilbrium position, then electric field force persistently increases, and the voltage of two lateral electrode of dielectric type electroactive polymer increases,
It is finally reached the balance of electric field force and mechanical force, the point of arrival 4, in the process, some mechanical is converted to electric energy.It is balanced in figure
The upper left side region of condition curve, double wave shape wave negative poisson's ratio arrangement works are under actuation modes, in equilibrium state curve
Lower right region then works under energy regenerating (or generator) or mode sensor.
Double wave shape wave negative poisson's ratio structure converts electrical energy into mechanical energy, basic principle when as actuating element are as follows:
When structure does not access power supply, the dielectric type electroactive polymer of tendon layer keeps balance under the action of load.And work as structure
When accessing power supply, dielectric type electroactive polymer two lateral electrode stored charge under the action of voltage, the electric field force of generation is along thick
Degree direction compression dielectric type electroactive polymer simultaneously increases its area, so that it is certain that double wave shape wave negative poisson's ratio structure occurs
The displacement of amount reaches the function of actuating.When the load p difference of the supply voltage Φ of structure access and receiving, double wave shape wave
The displacement that negative poisson's ratio structure generates is also different, to realize different actuation requirements.
Double wave shape wave negative poisson's ratio structure converts mechanical energy into electric energy when as energy regenerating element.Fig. 8 is illustrated
Double wave shape wave negative poisson's ratio structure is in the voltage and charge variation figure of the electromechanical circulation of typical case for being used as energy regenerating element, and Fig. 9 is then
The energy variation figure of typical electromechanical circulation is illustrated, tetra- points of A, B, C, D in Fig. 8 and Fig. 9 represent four identical states.Allusion quotation
Type electromechanics circulation includes 4 key steps:
(1) A point-B point disconnects power supply, the quantity of electric charge Q in two lateral electrode of dielectric type electroactive polymerLIt remains unchanged, then
Dielectric type electroactive polymer thickness reduces when load increases, and capacitor increases, and voltage drop is down to Φ between two lateral electrodesL, this is
The mechanical energy of tendon draw stage, the storage of dielectric type electroactive polymer increases；
(2) B point-C point, two lateral electrode of dielectric type electroactive polymer, which is connected to one, has lower voltage ΦLPower supply,
Dielectric type electroactive polymer thickness reduces, and the spacing between two lateral electrodes reduces and increases capacitor, and the quantity of electric charge increases to QH,
This is the charging stage, and the electric energy of dielectric type electroactive polymer storage increases；
(3) C point-D point disconnects power supply, the quantity of electric charge Q in open-circuitHIt remains unchanged, dielectric type electroactive polymer is thick
Degree increases, and capacitor reduces, then the voltage between two lateral electrodes increases to ΦH, this is tendon loosening stage, and dielectric type is electroactive poly-
The mechanical energy for closing object storage is partially converted to electric energy；
(4) D point-A point, two lateral electrodes are connected to high voltage ΦLPower supply, then dielectric type electroactive polymer thickness increase
Greatly, the quantity of electric charge is gradually decrease to QL, this is discharge regime, and the electric energy of dielectric type electroactive polymer storage reduces, and gives power supply
Charging.
Principle of the double wave shape wave negative poisson's ratio structure as sensor are as follows: access LCR table in circuit, then when load increases
When, tendon layer is stretched, and dielectric type electroactive polymer thickness reduces, and the spacing between two lateral electrodes reduces and capacitor is increased
Greatly, the variation of capacitor can then be measured by LCR table to calculate the variation of load.
By design certain control strategy and control system, it can be achieved that the multi-functional coupling of double wave shape wave negative poisson's ratio structure
It closes.
All double wave shape wave negative poisson's ratio cellulars for including are by identical or different material in double wave shape wave negative poisson's ratio structure
Material is made, and has identical or different structural parameters and section.
Double wave shape wave negative poisson's ratio structure can be made into the buffer element for including but are not limited to real-time variable, power-absorbing,
Damping element, spring-damper structure, sensor, actuator and energy regenerating element.
Those skilled in the art can understand that unless otherwise defined, all terms used herein (including skill
Art term and scientific term) there is meaning identical with the general understanding of those of ordinary skill in fields of the present invention.Also
It should be understood that those terms such as defined in the general dictionary should be understood that have in the context of the prior art
The consistent meaning of meaning will not be explained in an idealized or overly formal meaning and unless defined as here.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not limited to this hair the foregoing is merely a specific embodiment of the invention
Bright, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the present invention
Protection scope within.
Claims (6)
1. the double wave shape wave negative poisson's ratio structure based on dielectric type electroactive polymer, which is characterized in that by the negative pool of double wave shape wave
Pine forms than cellular array；
The double wave shape wave negative poisson's ratio cellular includes bone and tendon, and the tendon is arranged on bone, and the bone and
Tendon is in U-shape curve-like；
The bone includes the first arc section being successively smoothly connected with tendon, first straight line section, the second arc section, second straight
Line segment and third arc section；
The direction of first arc section of the tendon, the first arc section of the direction of third arc section and bone, third arc section
It is identical；Second arc section of the direction and bone of the second arc section of the tendon towards identical；First circle of the bone
The direction of second arc section of segmental arc, the direction of third arc section and bone is opposite；
The head end of first arc section of the head end and tendon of the first arc section of the bone is connected, the third arc section of bone
End is connected with the end of the third arc section of tendon；
The radius of corner phase of first arc section upper surface of the radius of corner and bone of the first arc section lower surface of the tendon
Together, the radius of corner of the third arc section upper surface of the radius of corner and bone of the third arc section lower surface of tendon is identical；
The Young's modulus of the bone is greater than the Young's modulus of tendon；
The tendon uses dielectric type electroactive polymer, and two flank external voltage.
2. the double wave shape wave negative poisson's ratio structure according to claim 1 based on dielectric type electroactive polymer, feature
It is, the bone is made of any one in steel, alloy material, high molecular polymer, high tensile strength fibrous material.
3. the double wave shape wave negative poisson's ratio structure according to claim 1 based on dielectric type electroactive polymer, feature
It is, the tendon is in Sandwich structure, wherein the sandwich material of tendon is dielectric elastomer, and sandwich material two sides are flexibility
Electrode, and the Young's modulus of two sides flexible electrode is less than the Young's modulus of dielectric elastomer.
4. the double wave shape wave negative poisson's ratio structure according to claim 3 based on dielectric type electroactive polymer, feature
It is, the sandwich material is used using any one in polyurethane elastomer, silica gel or acrylate, two sides flexible electrode
It is electrode carbon dust, silver paste, metallic film, carbon rouge, carbon nanotube, hydrogel electrolyte, graphene, any one in conductive elastomer
Kind.
5. the double wave shape wave negative poisson's ratio structure according to claim 1 based on dielectric type electroactive polymer, feature
It is, the end of the head end of the first arc section of the head end and tendon of the first arc section of the bone, the third arc section of bone
The end of the third arc section of end and tendon is attached by way of gluing.
6. the double wave shape wave negative poisson's ratio structure according to claim 1 based on dielectric type electroactive polymer, feature
It is, the head end frame of the first arc section of the tendon is on the head end of the first arc section of bone, the third arc section of tendon
Tip shelf on the end of the third arc section of bone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710422431.0A CN107294421B (en) | 2017-06-07 | 2017-06-07 | Double wave shape wave negative poisson's ratio structure based on dielectric type electroactive polymer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710422431.0A CN107294421B (en) | 2017-06-07 | 2017-06-07 | Double wave shape wave negative poisson's ratio structure based on dielectric type electroactive polymer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107294421A CN107294421A (en) | 2017-10-24 |
| CN107294421B true CN107294421B (en) | 2019-04-19 |
Family
ID=60096177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710422431.0A Expired - Fee Related CN107294421B (en) | 2017-06-07 | 2017-06-07 | Double wave shape wave negative poisson's ratio structure based on dielectric type electroactive polymer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107294421B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108904906B (en) * | 2018-05-30 | 2021-01-08 | 哈尔滨工业大学 | Wireless power supply type heart auxiliary blood supply device |
| CN108721719B (en) * | 2018-05-30 | 2021-02-19 | 哈尔滨工业大学 | Human body auxiliary blood supply device based on resonant wireless power transmission |
| CN108721720B (en) * | 2018-05-30 | 2021-03-30 | 哈尔滨工业大学 | Implantable heart auxiliary blood supply device based on wireless power transmission |
| CN108686275B (en) * | 2018-05-30 | 2020-12-11 | 哈尔滨工业大学 | Annular auxiliary blood supply device with wireless power supply function |
| US10749448B2 (en) * | 2018-11-30 | 2020-08-18 | Facebook Technologies, Llc | Engineered loading response in electroactive polymer devices having structured nanovoids |
| CN109787502B (en) * | 2019-01-14 | 2020-10-20 | 南京航空航天大学 | Electroactive polymers based on negative poisson's ratio dielectric elastomers |
| CN110919631A (en) * | 2019-11-19 | 2020-03-27 | 西安理工大学 | Rigid-flexible composite robot based on dielectric elastomer minimum energy structure |
| CN111331938B (en) * | 2020-03-06 | 2021-09-21 | 南京理工大学 | Static indeterminate negative Poisson ratio honeycomb structure based on arc-shaped wall corrugated plate |
| CN115530835A (en) * | 2022-10-21 | 2022-12-30 | 吉林大学 | Electrode system suitable for intelligent artificial limb |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101147271A (en) * | 2005-03-21 | 2008-03-19 | 人工肌肉有限公司 | High-performance electroactive polymer transducers |
| CN101526073A (en) * | 2009-04-17 | 2009-09-09 | 南京航空航天大学 | Fluid kinetic energy generator device based on dielectric EAP |
| CN102700704A (en) * | 2012-05-30 | 2012-10-03 | 南京航空航天大学 | Deformation skin for aircraft |
| US9048761B1 (en) * | 2012-03-06 | 2015-06-02 | The United States Of America As Represented By The Secretary Of The Navy | Energy harvesting device using auxetic materials |
| CN106202759A (en) * | 2016-07-15 | 2016-12-07 | 南京航空航天大学 | A kind of bionical negative poisson's ratio structure able to programme and method for designing |
| CN106712657A (en) * | 2016-11-22 | 2017-05-24 | 中国地质大学（武汉） | Photovoltaic-piezoelectric power generation type honeycomb sandwich composite board |
-
2017
- 2017-06-07 CN CN201710422431.0A patent/CN107294421B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101147271A (en) * | 2005-03-21 | 2008-03-19 | 人工肌肉有限公司 | High-performance electroactive polymer transducers |
| CN101526073A (en) * | 2009-04-17 | 2009-09-09 | 南京航空航天大学 | Fluid kinetic energy generator device based on dielectric EAP |
| US9048761B1 (en) * | 2012-03-06 | 2015-06-02 | The United States Of America As Represented By The Secretary Of The Navy | Energy harvesting device using auxetic materials |
| CN102700704A (en) * | 2012-05-30 | 2012-10-03 | 南京航空航天大学 | Deformation skin for aircraft |
| CN106202759A (en) * | 2016-07-15 | 2016-12-07 | 南京航空航天大学 | A kind of bionical negative poisson's ratio structure able to programme and method for designing |
| CN106712657A (en) * | 2016-11-22 | 2017-05-24 | 中国地质大学（武汉） | Photovoltaic-piezoelectric power generation type honeycomb sandwich composite board |
Non-Patent Citations (1)
| Title |
|---|
| "基于形状记忆聚合物的可变形蜂窝结构力学性能研究";杜昀桐;《中国优秀硕士学位论文全文数据库-工程科技Ⅰ辑》;20170215(第02期);第3-5、9页，第4章 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107294421A (en) | 2017-10-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107294421B (en) | Double wave shape wave negative poisson's ratio structure based on dielectric type electroactive polymer | |
| CN107276449B (en) | Chiral negative poisson's ratio structure based on dielectric type electroactive polymer | |
| CN107276450B (en) | Indent waveform negative poisson's ratio structure based on dielectric type electroactive polymer | |
| CN107276452B (en) | Star negative poisson's ratio structure based on dielectric type electroactive polymer | |
| CN107276451B (en) | Indent hexagon negative poisson's ratio structure based on dielectric type electroactive polymer | |
| Shian et al. | Dielectric elastomer based “grippers” for soft robotics | |
| Zhao et al. | A comparative analysis of piezoelectric transducers for harvesting energy from asphalt pavement | |
| Bai et al. | Cyclic performance of viscoelastic dielectric elastomers with solid hydrogel electrodes | |
| CN205195598U (en) | Composite nanowire generator | |
| Bortot et al. | Harvesting energy with load-driven dielectric elastomer annular membranes deforming out-of-plane | |
| CN100581039C (en) | Gas-filled type dielectric elastomer hemi-spherical driver | |
| Meijer et al. | Muscle-like actuators? A comparison between three electroactive polymers | |
| Zhang et al. | Modelling and characterization of inflated dielectric elastomer actuators with tubular configuration | |
| CN109787502A (en) | New Electroactive polymer based on negative poisson's ratio dielectric elastomer | |
| Ibrahim et al. | On geometrical configurations of vibration-driven piezoelectric energy harvesters for optimum energy transduction: a critical review | |
| Kim et al. | Piezoelectric energy harvesting using a diaphragm structure | |
| Springhetti et al. | Optimal energy-harvesting cycles for load-driven dielectric generators in plane strain | |
| CN109728743A (en) | A kind of electomechanical response estimation method of New Electroactive polymer | |
| CN109623781A (en) | A kind of hopping robot based on dielectric elastomer driving | |
| Liu et al. | Finite element analysis of the axial mechanical properties of piezoelectric actuator with tubular interdigitated electrodes | |
| CN107070295B (en) | U-shaped precision linear piezoelectric actuator and its motivational techniques | |
| CN105071697A (en) | Cantilever type piezoelectric material energy collector and utilization method | |
| KR101682961B1 (en) | Piezoelectric power generator | |
| Zheng et al. | Theoretical and simulation analysis of piezoelectric liquid resistance captor filled with pipeline | |
| Cao | Research on strain characteristics and power generation mechanism of electroactive acrylic elastomer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190419 Termination date: 20210607 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |