CN103573891A - Negative Poisson ratio structural component - Google Patents
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- CN103573891A CN103573891A CN201310566039.5A CN201310566039A CN103573891A CN 103573891 A CN103573891 A CN 103573891A CN 201310566039 A CN201310566039 A CN 201310566039A CN 103573891 A CN103573891 A CN 103573891A
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Abstract
The invention provides a negative Poisson ratio structural component. The negative Poisson ratio structural component is applied to negative Poisson ratio (NPR) structural materials in vehicles and other applications. The negative Poisson ratio structural component is generally of a tube shape structure or other shape structures with the center axis defined, the length defined and the cross section defined, the structure is composed of a plurality of nest type double-V-shaped unit pieces, each V-shaped unit piece comprises a pair of endpoints A and B, a first pair of stretching elements and a second pair of supporting elements, wherein the endpoints A and B define the width, the first pair of stretching elements are connected with the endpoints A and B and are intersected on an endpoint C to form a first V shape, and the second pair of supporting elements are connected with the endpoints A and B and are intersected on an endpoint D to form a second V shape. Multiple unit pieces are connected in a first direction in the mode that the endpoint B of one unit piece is connected with the endpoint A of another adjacent unit piece to form a continuous unit band. The unit pieces are further connected with another adjacent unit piece in the mode that the endpoint D of one unit piece is connected with the endpoint C of another unit piece in a second direction. In one embodiment, the unit pieces are overlaid outwards along the axis in a radial pattern to form a lining, and in a second embodiment, the unit pieces are overlaid longitudinally along the structure to form a buffer block.
Description
Technical field
The present invention relates to a kind of negative poisson ' s ratio (NPR) structure member that has, especially use the made lining of this NPR structure member, the buffer stopper that jolts, the devices such as the suspension of (car body and engine), spring, disc spring.
Background technique
Poisson's ratio (v), according to Xi Moen Poisson (Simeon Poisson), name, it refers to relative contraction strain, or transverse strain (perpendicular with applied load) is divided by the negative value of the ratio of relative prolongation strain or axial strain (in the direction of imposed load) gained.Some materials have negative poisson ' s ratio (NPR structure).If this material is stretched in one direction (or compression), it in vertical direction can chap (or attenuating).
The reaction of NPR structure in the situation that of imposed load is different.Fig. 1 has shown a kind of reaction contractile mechanism obtaining by process of topology optimization.The feature of this structure is when compressed in one direction, and its can shrink on both direction simultaneously.Fig. 1 shown when compressive load is born at the top of this structure, and more material is gathered in and under load, makes the part area of structure become more just to resist more by force load.
Fig. 2 has shown to have when compressed in one direction, negative poisson ' s ratio (NPR) structure of the feature that can shrink along all directions.Inventor has has researched and developed the analysis by Linearization method of a kind of nonlinear finite element method and a kind of multi-step, is used for predicting the non-linear behavior of this material.For any significantly load, consider that geometric nonlinear can calculate the available characteristic of material, for example the density of Young's modulus, Poisson's ratio, material and load-carrying efficiency.
Two-dimensional structure shown in Fig. 1 and Fig. 2 has comprised a plurality of nidos " V-type " unit piece, each unit piece has comprised a pair of terminal A and the B that defines width l, the first pair of connected straight line or bent member 202, there is constant or variable cross section, connection end point A and B, and intersect at end points C, thereby form the V-arrangement that first has defined expanded material, the second pair of straight line or bent member 204, there is constant or variable cross section, connection end point A and B, and intersect at end points D, thereby second V-arrangement that defines " support rib " material formed.Thereby a plurality of described unit pieces connections are embarked on journey and are formed a unit band afterwards, and one of them unary terminal B is connected with the terminal A of another adjacent cells part.A plurality of described unit pieces are longitudinally stack further, and one of them unary end points D is connected with the end points C of another adjacent cells part.
Fig. 3 A has shown in Fig. 2, to have angle θ
1=60 °, θ
2the structure of=120 °, Fig. 3 B has shown in Fig. 2 with angle θ
1=30 °, θ
2the structure of=60 °.Fig. 3 has also shown shape after the distortion of prediction and the material available characteristic of two structures, and wherein alphabetical ν represents Poisson's ratio and letter e represents effective Young's modulus.In Fig. 3 A and 3B, dotted line represents undeformed shape, and solid line represents the shape after distortion.After being contrasted, Fig. 3 A and 3B can find out that the deformed shape of these two structures under same load-up condition is very different.Poisson's ratio has become ν=-7.4 of structure 3B from ν=-0.96 of structure 3A, and effectively Young's modulus has become the E=2.7e3MPa of structure 3B from the E=1.4e3MPa of structure 3A.This show the second structure 3B be more suitable for need to be larger NPR absolute value and the situation of higher Young's modulus.
Fig. 4 has shown situation when NPR structure is applied to local compression.Dotted line represents the prototectonics of this structure, and solid line has been shown the structure after the distortion simulating.As shown in the figure, the effect based on negative poisson ' s ratio, when applying power, the material of surrounding can focus on regional area.Therefore this material becomes more just stronger at regional area.
Due to its unique characteristic, NPR structural material has caused very large interest.When vertically compressing, be different from traditional material, NPR structural material may shrink.A result of this characteristic is exactly, and described material can be concentrated himself to resist better load when load by compression.Therefore,, along with the amplitude increase of load, it is more firmly stronger that NPR structural material also can become.NPR structure has been found characteristic that can reinforcing material/structure, comprises and strengthens heat-resisting/impact, fracture toughness, resistance to indentation and shear modulus.
At vehicle, neutralize other place, also have a lot of other power absorption and/or vibration damping devices, comprise lining and buffer stopper.Lining is even more important because they are widely used in chassis and suspension system.Fig. 5 A has shown the exemplary position of lining in vehicle suspension system, and wherein, the exemplary position of lining is marked by label 1,2,3,4,5,6,7,8,9,10.Fig. 5 B has shown the exemplary position of lining in vehicle chassis, and wherein, the exemplary position of lining is marked by label 51,52,53,54,55,56,57,58,59,510,511,512,513,514,515.
Lining has plurality of advantages: it flexibly connects all parts; Can high-frequency percussion and road be jolted and be isolated; The vibrational energy that can suppress to transmit by lining also reduces noise.Existing lining has following shortcoming: it may affect controlling of vehicle and steering behaviour, loses curved surface and controls, and front amount of deflection turns to, rear amount of deflection and torque steering, and may have influence on the precision of dynamic simulation.
Existing most of lining is by rubber, and polyurethane or nylon are made, be Relation for Nonlinear Viscoelastic Materials and demonstrate the rigidity relevant to displacement, can be lax under permanent load and the shortcoming such as response lag.Its force-displacement relationship is nonlinear, relevant to frequency and load histories.The low cost of rubber bushing.But when it provides superior isolation effect, its larger skew also can have influence on and control and steering characteristic.Polyurethane lining rigidity is larger, has less deflection and can provide better to control and steering behaviour.Yet polyurethane lining is difficult to absorb the energy of rotational shear.Nylon lining and axle bush are relatively cheap, but sleeve need to be processed into the tightest limit.
Summary of the invention
The object of the invention is by using negative poisson ' s ratio (NPR) structure to improve the multiple parts for vehicle and other structures.Described parts include but not limited to the lining on automobile, hang and buffer stopper.NPR structure alternative has many potential advantages, comprises that weight is lighter, has improved load rigidity and dynamics of vehicle, and has characteristic more stable and that more easily predict.The made parts of NPR structural material can be realized and take function and be can to customize the design of guiding its characteristic better non-linear response characteristic is provided; For example, in different axles or direction, provide different dynamic characteristics.
NPR structure member in the present invention is generally assumed to tubular structure, has corresponding axis, length and cross section.Described structure is comprised of two V-arrangement unit pieces of a plurality of nidos, each V-arrangement unit piece comprises that a pair of terminal A and B define width, first pair of stretching element is connected with B with terminal A and intersects in end points C, thereby form first V-arrangement, second pair of supporting member is connected with B with terminal A and intersects in end points D, thereby forms second V-arrangement.The mode that a plurality of unit pieces are connected with a unary terminal B unary terminal A adjacent with another is in a first direction connected, until form a continuous unit band.The mode that described unit piece is connected with a unary end points D unary end points C adjacent with another further in second direction is connected.In first embodiment, thereby described unit band is outwards stack formation lining of radioactivity along axle.Second embodiment, thereby described unit band longitudinally superposes and forms buffer stopper along structure.
Described stretching element and/or supporting member, can be for straight or crooked, and one of them element or two elements can have constant or variable cross section.Described stretching element and supporting member can be comprised of same or different materials.Described stretching element can be more soft than described supporting member, and can form a part for one or more continuous sheet materials.If described stretching element and supporting member are comprised of same material, described NPR structure member can be by casting or extrusion modling.
The part that the two V unit pieces of a plurality of nidos can be used as lining is connected to internal surface or the outer surface of coaxial circle cylindricality sleeve.For example, at lining and jolting in buffer block structure, the two V unit pieces of a plurality of nidos are connected to the internal surface of cup-like containers.The cross section of described NPR structure member can be circular or have the polygonal of even number of sides.
Unary quantity in a unit band is defined as periodicity, and described periodicity can change according to application.Unit piece in a unit band can define height, the height between different units band can be identical can be also different.The angle of the first or second V-arrangement at least some unit pieces may be different.Described supporting member, stretching element or both can be made by metal, pottery, fibre reinforced composites, polymer matrix material or plastics.In some embodiments, between supporting member and stretching element, may comprise foam or other packing materials.In addition, described unary V-arrangement bottom can or form a U-shaped for plane.Even under special circumstances, described v-shaped structure can be degenerated to straight line, curve or reversed V-shape structure.
The application has also comprised the devices such as the lining that utilizes this NPR structure member made, buffer stopper, suspension, spring, disc spring.
A structure member, comprising:
The structure of tubulose or other shapes, has corresponding axle, length and cross section; Described structure is comprised of two V-arrangement unit pieces of a plurality of nidos, described in each, unit piece comprises that a pair of terminal A and B define width, first pair of stretching element is connected with B with terminal A and intersects in end points C, thereby form first V-arrangement, second pair of supporting member is connected with B with terminal A and intersects in end points D, thereby forms second V-arrangement;
The mode that described unit piece is connected with a unary terminal B unary terminal A adjacent with another is in a first direction connected, until form a continuous unit band;
The mode that described unit piece is connected with a unary end points D unary end points C adjacent with another further in second direction is connected; Wherein, described unit band is the radioactivity formation lining that outwards superposes along axle; Or described unit band longitudinally superposes and forms the buffer stopper that jolts along described structure.
The present invention also has following subsidiary characteristic:
Described stretching element is straight or crooked.
Described stretching element has constant or variable cross section.
Described supporting member is straight or crooked.
Described supporting member has constant or variable cross section.
Described stretching element and described supporting member are made by similar and different material.
Described stretching element and described supporting member are comprised of similar and different material, and described stretching element is more soft than described supporting member.
Described stretching element is a part for one or more continuous sheet materials.
Described stretching element and described supporting member are manufactured from the same material; Described parts are by casting or extrusion modling.
The two V-arrangement unit pieces of a plurality of described nidos are connected with the outer surface of coaxial cylinders shape sleeve.
The two V-arrangement unit pieces of a plurality of described nidos are connected with the internal surface of coaxial cylinders shape sleeve.
The two V-arrangement unit pieces of a plurality of described nidos are connected with the internal surface of cup-like containers.
Described unary quantity in described unit band is defined as periodicity, and described periodicity can change according to application.
Described unit piece in described unit band defines the thickness of height or ring, and the described height between different units band can be identical or different.
Comprise wall scroll, two bar or many described unit bands.
The angle of first described at least some in unit piece or the second V-arrangement is different.
Described supporting member, stretching element or both are made by metal, pottery, rubber, fibre reinforced composites, polymer matrix material or plastics.
Between described supporting member and stretching element, also comprise foam or other blocking materials.
Described parts cross section be circular, there is the polygonal of even number of sides, or other shape that can manufacture.
Described unary V-arrangement bottom can or form a U-shaped for plane.
Described tensile layer, supporting layer or both are plane sheets or any curved sheets.
V-shaped structure can be degenerated to straight line under special circumstances, curve or reversed V-shape structure.
All unit pieces can have identical or different shape, size, sectional shape, sectional dimension and angle, can use identical or different material.
In different directions, there are similar and different equivalent stiffness, equivalent mass and equivalent damping characteristics.
The lining and/or the buffer stopper that utilize above-mentioned negative poisson ' s ratio structure member to make.
Utilize that above-mentioned negative poisson ' s ratio structure member makes other are crashproof, shockproof, vibration isolation and spring-damping structure.
Accompanying drawing explanation
Fig. 1 has shown the reaction contractile mechanism obtaining by computer simulation process.
Fig. 2 has shown specific negative poisson ' s ratio (NPR) structure.
Fig. 3 A has shown the material in Fig. 2, θ 1=60 ° wherein, θ 2=120 °.
Fig. 3 B has shown the material in Fig. 2, θ 1=30 ° wherein, θ 2=60 °.
Fig. 4 has shown that NPR structure can be used for load-bearing application.
Fig. 5 A has shown the exemplary position of lining in vehicle suspension system.
Fig. 5 B has shown the exemplary position of lining in vehicle chassis.
Fig. 6 A has described a kind of liner type that the present invention was suitable for.
Fig. 6 B has described the another kind of liner type that the present invention was suitable for.
Fig. 6 C has described the third liner type that the present invention was suitable for.
Fig. 7 A is the schematic diagram of two-layer NPR bush structure, and comprising 24 unit pieces, the size of support/stretching element marks with millimeter.
Fig. 7 B is the schematic diagram of two-layer NPR bush structure, and comprising 20 unit pieces, the size of support/stretching element marks with millimeter.
Fig. 7 C is the schematic diagram of two-layer NPR bush structure, comprising 20 unit pieces, but different from Fig. 7 B of the size of support/stretching element.
Fig. 8 provides the stiffness curve of three kinds of bushing design shown in Fig. 7 A to 7C.
Fig. 9 represents if the lining of spliced map 7B and Fig. 7 C, and because the size of different direction upper support/stretching element is different, the rigidity of the different direction that it is corresponding also can be different.
Figure 10 represents if the lining of spliced map 7A and Fig. 7 C is different by the periodicity of element of construction on different direction, and the rigidity of the different direction that it is corresponding also can be different.
Figure 11 represent if the lining of spliced map 7A and Fig. 7 B because the angle of the supporting member on different direction is different with periodicity, the rigidity of the different direction that it is corresponding also can be different.
Figure 12 A is the partial cross section sketch that comprises the buffer stopper assembling of jolting of interior pin and cup cover.
Figure 12 B is the oblique drawing of NPR structure buffer stopper alternative.
Figure 13 is for being applicable to unary schematic diagram in buffer stopper embodiment of the present invention.
Figure 14 A is the axonometric drawing of buffer stopper, wherein the unit piece stack in two picture groups 13 is formed to a four sides structure.
Figure 14 B is the axonometric drawing of buffer stopper, wherein the unit piece stack in three picture groups 13 is formed to six structures.
Figure 14 C is the axonometric drawing of buffer stopper, wherein the unit piece stack in four picture groups 13 is formed to an octahedral structure.
Figure 14 D is the axonometric drawing of buffer stopper, wherein the unit piece stack in five picture groups 13 is formed to ten structures.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail:
The object of the invention is to use negative poisson ' s ratio (NPR) material to make the multiple parts for vehicle and other application.Described parts include but not limited to lining, hang and buffer stopper.NPR structure alternative has many potential advantages.With respect to existing rubber components (lining hangs and buffer stopper), the advantage of NPR structure alternative has: weight roughly only has half, has improved load rigidity and dynamics of vehicle, and has characteristic more stable and that more easily predict.With respect to existing polyurethane part, the weight of NPR structure member is lighter, and in the situation that the dynamic characteristic reaching in rotational stiffness/pliability and all directions has better vibration isolation and impact resistance.With respect to existing nylon parts, NPR constructional device weight is lighter, does not need independent machined bearing, thereby has reduced fabricating cost.Regardless of material, NPR structure member has been realized and take function and be can to customize the design of guiding its characteristic better non-linear response characteristic is provided, and for example, provides different dynamic characteristics in different axles or direction.
Fig. 6 A has shown a kind of liner type that the present invention was suitable for.In the design, existing Elastic Cylindrical/polymeric material 602 and inside/outside rigidity, the sleeve 604,608 that is generally metal is connected, and described material 602 can be substituted by NPR structural material of the present invention.Fig. 6 B has shown the lining 610 of the another kind of type that the present invention was suitable for, and its king-rod 622 moves with respect to sheet material 620.In the design, part or whole axle bush can be substituted by NPR structure.For example, cylindrical body 612 can be made by NPR structural material, and is connected with the extremity piece 614,616 of rigidity or flexibility.Fig. 6 C has also shown the lining of the third type that the present invention was suitable for.In the design, alternative axle bush 628 is at least partially contained within a cup die cavity body 634 and with bar 630 and is connected, thereby realizes damped motion between bar 630 and 632.Fig. 6 A, the present invention shown in 6B and 6C not exhaustive, because in the situation that can to take function be the design of guiding, can revise to change its physical arrangement by suitable engineering.
Fig. 7 A to 7C has shown according to the present invention the slightly different NPR lining structure of manufacturing.In these figure, with the unary unit of nido V-arrangement band, be radial outside stack, there is the ideal length perpendicular to paper.The rigid sleeve that outer shroud 702 and 704 representatives of interior ring are made by metal, pottery, plastics, polyurethane or other macromolecular materials or other suitable materials.Described supporting member equally also can be made by metal, pottery, rubber plastic, polyurethane or other macromolecular materials, and the expanded material of unit band can be more soft, and by natural or artificial rubber, polyurethane, macromolecular material or other flexible or deformable materials are made.In other embodiments, described blocking materials and expanded material can be the same and described structure can extrusion modling.According to the needs of application, described supporting member and/or stretching element can be solid or hollow bar or pipes, smooth or crooked plate or bar, or U-shaped, T shape, V-arrangement or I ellbeam.
Fig. 7 A is the schematic diagram of two-layer NPR bush structure, and comprising 24 unit pieces, first layer stretching element 701 is of a size of 1.016 millimeters, and second layer stretching element 703 is of a size of 1.27 millimeters, and the supporting member between two-layer is of a size of 0.5 millimeter.Fig. 7 B is the schematic diagram of two-layer NPR bush structure, and comprising 20 unit pieces, first layer stretching element 701 is of a size of 1.016 millimeters, and second layer stretching element 703 is of a size of 1.27 millimeters, and the supporting member between two-layer is of a size of 0.5 millimeter.Fig. 7 C is the schematic diagram of two-layer NPR bush structure, comprising 20 unit pieces, but different from Fig. 7 B of the size of support/stretching element, first layer stretching element 701 is of a size of 1.5 millimeters, second layer stretching element 703 is of a size of 2 millimeters, and the supporting member between two-layer is of a size of 1 millimeter.。The structure that it should be noted that individual layer, bilayer or multilayer is also contained in protection scope of the present invention.
Fig. 8 provides the stiffness curve of three kinds of bushing design shown in Fig. 7 A to 7C, wherein f1 has represented the stiffness curve of the bushing design shown in Fig. 7 A, wherein f2 has represented the stiffness curve of the bushing design shown in Fig. 7 B, and wherein f3 has represented the stiffness curve of the bushing design shown in Fig. 7 C.As expected, owing to having adopted thicker supporting member and stretching element, the lining in Fig. 7 C shows larger rigidity to applied pressure.Fig. 7 B lining is identical with the cross-sectional diameter of stretching element with the supporting member of Fig. 7 A lining, but structure is in the unary quantity different (one is 20, and one is 24) around circumferencial direction.Therefore, both stiffness curves are not identical and the pressure downcrossings of about 1300 Ns yet.Fig. 9 represents if the lining of spliced map 7B and Fig. 7 C, and because the size of different direction upper support/stretching element is different, the rigidity of the different direction that it is corresponding also can be different.Figure 10 represents if the lining of spliced map 7A and Fig. 7 C is different by the periodicity of element of construction on different direction, and the rigidity of the different direction that it is corresponding also can be different.Figure 11 represent if the lining of spliced map 7A and Fig. 7 B because the angle of the supporting member on different direction is different with periodicity, the rigidity of the different direction that it is corresponding also can be different.
Wherein, in bush structure, the V-arrangement unit piece of nido is outwards stack of radioactivity.In other devices, buffer stopper for example, unit piece is along longitudinally stack of parts.Figure 12 A is the partial cross section sketch that comprises buffer stopper 1200 structures of interior pin 1202 and cup cover 1204.Figure 12 B is the oblique drawing of the NPR buffer stopper alternative of structure in alternate figures 12A, wherein can use identical cup cover and interior pin.
Figure 13 rushes unary schematic diagram in piece embodiment for being applicable to the present invention top.Point before being different from, A ', B ', C ', D ' region can include a plane unit piece can be linked together by stickup, welding or other effective methods.Lining embodiment as disclosed in this, described supporting member 1210 can be made by metal, pottery or plastics, and the expanded material 1212 of unit band can be more soft, and by natural or artificial rubber, or other flexible or deformable materials are made.In other embodiments, described blocking materials and expanded material can be the same and described structure can cast or push and form.
Adopted and take function and be the design of guiding, in described buffer stopper (and lining), in direction longitudinal and/or that radioactivity is outside, can change stretching element and supporting member quantity, size, make material and/or shape reaches concrete application requirements.The axonometric drawing that for example Figure 14 A is buffer stopper, wherein forms a four sides structure by the unit piece stack in two picture groups 13; Figure 14 B is the axonometric drawing of buffer stopper, wherein the unit piece stack in three picture groups 13 is formed to six structures; Figure 14 C is the axonometric drawing of buffer stopper, wherein the unit piece stack in four picture groups 13 is formed to an octahedral structure; Figure 14 D is the axonometric drawing of buffer stopper, wherein the unit piece stack in five picture groups 13 is formed to ten structures.In addition, in the negative poisson ' s ratio structure member in the present invention, all unit pieces can have identical or different shape, size, sectional shape, sectional dimension and angle, can use identical or different material.And in different directions, there are being similar and different equivalent stiffness, equivalent mass and equivalent damping characteristics.This is no longer going to repeat them.
Claims (26)
1. a negative poisson ' s ratio structure member, is characterized in that, comprising:
The structure of tubulose or other shapes, has corresponding axle, length and cross section; Described structure is comprised of two V-arrangement unit pieces of a plurality of nidos, described in each, unit piece comprises that a pair of terminal A and B define width, first pair of stretching element is connected with B with terminal A and intersects in end points C, thereby form first V-arrangement, second pair of supporting member is connected with B with terminal A and intersects in end points D, thereby forms second V-arrangement;
The mode that described unit piece is connected with a unary terminal B unary terminal A adjacent with another is in a first direction connected, until form a continuous unit band;
The mode that described unit piece is connected with a unary end points D unary end points C adjacent with another further in second direction is connected; Wherein, described unit band is the radioactivity formation lining that outwards superposes along axle; Or described unit band longitudinally superposes and forms the buffer stopper that jolts along described structure.
2. negative poisson ' s ratio structure member as claimed in claim 1, is characterized in that, described stretching element is straight or crooked.
3. negative poisson ' s ratio structure member as claimed in claim 1, is characterized in that, described stretching element has constant or variable cross section.
4. negative poisson ' s ratio structure member as claimed in claim 1, is characterized in that, described supporting member is straight or crooked.
5. negative poisson ' s ratio structure member as claimed in claim 1, is characterized in that, described supporting member has constant or variable cross section.
6. negative poisson ' s ratio structure member as claimed in claim 1, is characterized in that, described stretching element and described supporting member are made by similar and different material.
7. negative poisson ' s ratio structure member as claimed in claim 1, is characterized in that, described stretching element and described supporting member are comprised of similar and different material, and described stretching element is more soft than described supporting member.
8. negative poisson ' s ratio structure member as claimed in claim 1, is characterized in that, described stretching element is a part for one or more continuous sheet materials.
9. negative poisson ' s ratio structure member as claimed in claim 1, is characterized in that, described stretching element and described supporting member are manufactured from the same material; Described parts are by casting or extrusion modling.
10. negative poisson ' s ratio structure member as claimed in claim 1, is characterized in that, the two V-arrangement unit pieces of a plurality of described nidos are connected with the outer surface of coaxial cylinders shape sleeve.
11. negative poisson ' s ratio structure members as claimed in claim 1, is characterized in that, the two V-arrangement unit pieces of a plurality of described nidos are connected with the internal surface of coaxial cylinders shape sleeve.
12. negative poisson ' s ratio structure members as claimed in claim 1, is characterized in that, the two V-arrangement unit pieces of a plurality of described nidos are connected with the internal surface of cup-like containers.
13. negative poisson ' s ratio structure members as claimed in claim 1, is characterized in that, the described unary quantity in described unit band is defined as periodicity, and described periodicity can change according to application.
14. negative poisson ' s ratio structure members as claimed in claim 1, is characterized in that, the described unit piece in described unit band defines the thickness of height or ring, and the described height between different units band can be identical or different.
15. negative poisson ' s ratio structure members as claimed in claim 1, is characterized in that, comprise wall scroll, two bar or many described unit bands.
16. negative poisson ' s ratio structure members as claimed in claim 1, is characterized in that, the angle of first described at least some in unit piece or the second V-arrangement is different.
17. negative poisson ' s ratio structure members as claimed in claim 1, is characterized in that, described supporting member, stretching element or both are made by metal, pottery, rubber, fibre reinforced composites, polymer matrix material or plastics.
18. negative poisson ' s ratio structure members as claimed in claim 1, is characterized in that, also comprise foam or other blocking materials between described supporting member and stretching element.
19. negative poisson ' s ratio structure members as claimed in claim 1, is characterized in that, described parts cross section be circular, there is the polygonal of even number of sides, or other shape that can manufacture.
20. negative poisson ' s ratio structure members as claimed in claim 1, is characterized in that, described unary V-arrangement bottom can or form a U-shaped for plane.
21. negative poisson ' s ratio structure members as claimed in claim 1, is characterized in that, described tensile layer, supporting layer or both are plane sheets or any curved sheets.
22. negative poisson ' s ratio structure members as claimed in claim 1, is characterized in that, v-shaped structure can be degenerated to straight line under special circumstances, curve or reversed V-shape structure.
23. negative poisson ' s ratio structure members as claimed in claim 1, is characterized in that, all unit pieces can have identical or different shape, size, sectional shape, sectional dimension and angle, can use identical or different material.
24. negative poisson ' s ratio structure members as claimed in claim 1, is characterized in that in different directions, having similar and different equivalent stiffness, equivalent mass and equivalent damping characteristics.
25. lining and/or the buffer stoppers that utilize the arbitrary negative poisson ' s ratio structure member of the claims 1-24 to make.
26. utilize that the arbitrary negative poisson ' s ratio structure member of the claims 1-24 makes other are crashproof, shockproof, vibration isolation and spring-damping structure.
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| CN110077345A (en) * | 2019-04-22 | 2019-08-02 | 南京理工大学 | A kind of negative poisson's ratio car crass energy-absorption box |
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| CN110777700A (en) * | 2019-11-07 | 2020-02-11 | 湘潭大学 | Multistage energy consumption highway buffer stop |
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| US10878791B2 (en) | 2016-12-20 | 2020-12-29 | Airbus Operations S.L. | Energy absorbing structure for attenuating the energy transmitted from an energy source |
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| CN104864016B (en) * | 2014-02-21 | 2017-08-22 | 广州汽车集团股份有限公司 | A kind of vibration damper assembly and its buffer block structure |
| CN104864016A (en) * | 2014-02-21 | 2015-08-26 | 广州汽车集团股份有限公司 | Vibration reducer assembly and buffer block structure thereof |
| CN106553332A (en) * | 2016-10-12 | 2017-04-05 | 深圳大学 | The method that direct write forming technique prepares fibre-reinforced negative Poisson characteristics structure |
| US10878791B2 (en) | 2016-12-20 | 2020-12-29 | Airbus Operations S.L. | Energy absorbing structure for attenuating the energy transmitted from an energy source |
| CN107145626A (en) * | 2017-03-30 | 2017-09-08 | 南京航空航天大学 | A kind of negative poisson's ratio structure energy-absorption box and its multidisciplinary collaboration optimization method |
| CN107145626B (en) * | 2017-03-30 | 2023-11-07 | 南京航空航天大学 | Negative poisson ratio structure energy-absorbing box and multidisciplinary collaborative optimization method thereof |
| CN107187501A (en) * | 2017-05-12 | 2017-09-22 | 南京理工大学 | Negative poisson's ratio automobile energy-absorbing device |
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| CN107600012A (en) * | 2017-09-20 | 2018-01-19 | 江苏大学 | A kind of automotive front end endergonic structure based on customizing functions |
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| CN108032912A (en) * | 2017-12-05 | 2018-05-15 | 吉林大学 | A kind of new automobile hood with special infinitesimal born of the same parents filled layer |
| CN108032912B (en) * | 2017-12-05 | 2022-04-15 | 吉林大学 | Automobile engine hood with special microcell filling layer |
| CN109579618A (en) * | 2018-12-21 | 2019-04-05 | 华侨大学 | A kind of composite bulletproof garment |
| CN110077345A (en) * | 2019-04-22 | 2019-08-02 | 南京理工大学 | A kind of negative poisson's ratio car crass energy-absorption box |
| CN110067682A (en) * | 2019-05-09 | 2019-07-30 | 华南农业大学 | A kind of variable intake manifold device based on negative poisson's ratio structure |
| CN110169675A (en) * | 2019-05-16 | 2019-08-27 | 广州美术学院 | A kind of negative poisson's ratio mattress |
| CN110777700A (en) * | 2019-11-07 | 2020-02-11 | 湘潭大学 | Multistage energy consumption highway buffer stop |
| CN110819843A (en) * | 2019-11-15 | 2020-02-21 | 南京理工大学 | Negative poisson ratio cellular lattice shaped ceramic skeleton reinforced composite material and manufacturing method thereof |
| CN112549057A (en) * | 2020-12-23 | 2021-03-26 | 山东理工大学 | Novel mechanical arm flexible clamping jaw for sorting and recycling garbage |
| CN114941673A (en) * | 2021-12-08 | 2022-08-26 | 西安交通大学 | Composite negative Poisson's ratio structure for buffering energy absorption |
| CN114941673B (en) * | 2021-12-08 | 2023-08-18 | 西安交通大学 | Composite negative poisson ratio structure for buffering and absorbing energy |
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