CN109878443A - Energy-absorption box based on interior concave polyhedron negative poisson's ratio three-dimensional structure inner core - Google Patents
Energy-absorption box based on interior concave polyhedron negative poisson's ratio three-dimensional structure inner core Download PDFInfo
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- CN109878443A CN109878443A CN201910184512.0A CN201910184512A CN109878443A CN 109878443 A CN109878443 A CN 109878443A CN 201910184512 A CN201910184512 A CN 201910184512A CN 109878443 A CN109878443 A CN 109878443A
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Abstract
The invention discloses a kind of energy-absorption boxes based on interior concave polyhedron negative poisson's ratio three-dimensional structure inner core, including the front mounting plate being connected with automobile buffer beam, the rear mounting plate being connected with automobile longitudinal girder, energy-absorption box box body and the interior concave polyhedron negative poisson's ratio three-dimensional structure inner core for being filled in box cavity；Inner core is formed by connecting by multiple interior concave polyhedron negative poisson's ratio single cell structures in three-dimensional array arrangement.Energy-absorption box of the invention makes energy-absorption box have negative poisson's ratio and rigidity enhancing characteristic in the direction that is hit, can improve the energy-absorbing effect under multiple operating conditions simultaneously, improve the collision safety performance of vehicle by combining negative poisson's ratio three-dimensional structure.
Description
Technical field
The present invention relates to vehicle structure crash-worthiness design fields, and in particular to one kind is based on interior concave polyhedron negative poisson's ratio three
Tie up the energy-absorption box of structure inner core.
Background technique
Automobile front beam system is as the main component part in vehicle passive safety design, and the purpose is in automobile
Occur to realize following functions when head-on crash: when vehicle-occurrences in human life event occurs, system should reduce to greatest extent impact force to eliminate to row
The injury of people leg and knee；When generation Che-vehicle, vehicle-formal matter are former, system can control part distortion in smaller area as far as possible
It is interior to protect remaining important spare part, reduce subsequent maintenance cost.Energy-absorption box is the important energy-absorbing portion of automobile front beam system
Part, it is between bumper beam and automobile front longitudinal beam.
Generally use metal thin-wall pipe fitting when traditional energy-absorbing box structure design, such as Chinese patent is announced
CN103909888A, when colliding, thin-wall pipe can will be impacted by the plastic deformation of the forms such as bending, warpage or fold
Kinetic energy dissipation be deformation can, account for 90% by the energy absorbed when low speed collision, but its under high speed collision because itself is lower
Strength and stiffness can not absorb more energy, cause energy transfer to cause stringer or even enging cabin to the front longitudinal beam at rear
The destruction of components.
In addition, there is the light porous material of good energy absorption characteristics can not change original knot for filling inside thin wall box
Buffering energy-absorbing effect, such as the CN105235617A that Chinese patent is announced are significantly improved under the premise of structure.But this kind filling is fine
There is deformation when automobile collides and be not sufficiently stable, compress not thorough enough and can not control in the energy-absorption box of dimension enhancing composite material
The problems such as making the injury to pedestrian.
Summary of the invention
The purpose of the present invention is to provide a kind of energy-absorption boxes based on interior concave polyhedron negative poisson's ratio three-dimensional structure inner core, bear
Steady and controllable compressive deformation can occur when being acted on by load for Poisson's ratio structural material, while in negative poisson's ratio characteristic
Under the action of present rigidity enhance characteristic, by negative poisson's ratio structural material applications in energy-absorption box design, different vehicles can be met simultaneously
To the protection demand of pedestrian, vehicle and occupant when speed collision.
Realize the technical solution of the object of the invention are as follows: a kind of suction based on interior concave polyhedron negative poisson's ratio three-dimensional structure inner core
Energy box, including the front mounting plate being connect with automobile buffer beam, the rear mounting plate being connect with automobile longitudinal girder, energy-absorption box box body, and
It is filled in the interior concave polyhedron negative poisson's ratio three-dimensional structure inner core of energy-absorption box box cavity；The energy-absorption box box body is that section is square
The closed thin wall structure of shape, both ends are connect with forward and backward mounting plate respectively；The single cell structure of the negative poisson's ratio three-dimensional structure is by six
A symmetrical inner concave composition, six faces of single cell structure are in umbrella-shaped structure, and intermediate four isometric bevel edges are bending on inner concave
Rib, the orthogonal thereto arrangement of four curved ribs and top are intersected in some formation indent vertex of surface, each face surrounding and four branch are distributed with
Born of the same parents' arm is supportted, every support born of the same parents arm is made of two bevel edges, and inner concavity is presented, and support born of the same parents' arm is shared in two neighboring face, each
There is a connecting rod at the fovea superior angular vertex of face, adjacent cell element is attached by sharing this connecting rod, to form one
A complete single cell structure.
Compared with prior art, the invention has the following advantages that
(1) present invention is by negative poisson's ratio three-dimensional structure and traditional thin-walled energy-absorption box a kind of novel negative Poisson designed in conjunction
Than structure energy-absorption box, lower impact force is maintained in low speed collision, there is good pedestrian protecting performance, while stablizing, is controllable
Crumple process improve energy absorbing efficiency, enhance the protection to vehicle body rear part structure, saved maintenance cost；
(2) the negative poisson's ratio three-dimensional structure inner core applied in the present invention is when high speed collision occurs for vehicle, in negative Poisson
Enhance characteristic than rigidity is presented under the action of effect, generates higher plateau stress, absorb more impact energys, touched in high speed
Energy-absorbing effect under hitting is significantly improved.
Detailed description of the invention
Fig. 1 is that the present invention is based on the energy-absorption box overall structure diagrams of interior concave polyhedron negative poisson's ratio three-dimensional structure inner core.
Fig. 2 is that the present invention is based on the energy-absorption box cross-sectional view of the structure of interior concave polyhedron negative poisson's ratio three-dimensional structure inner core.
Fig. 3 is that the present invention is based on the negative poisson's ratio three-dimensional knots of the energy-absorption box of interior concave polyhedron negative poisson's ratio three-dimensional structure inner core
Structure inner core schematic diagram.
Fig. 4 is that the present invention is based on the energy-absorption box single cell structure schematic diagrames of interior concave polyhedron negative poisson's ratio three-dimensional structure inner core.
Specific embodiment
A kind of energy-absorption box based on interior concave polyhedron negative poisson's ratio three-dimensional structure inner core, comprising: connect with automobile buffer beam
Front mounting plate, the rear mounting plate connecting with automobile longitudinal girder, energy-absorption box box body and the interior concave polyhedron for being filled in box cavity are negative
Poisson's ratio three-dimensional structure inner core；
The energy-absorption box box body is the closed thin wall structure that section is rectangle, and both ends are connect with forward and backward mounting plate respectively；Institute
The unit cell for stating negative poisson's ratio three-dimensional structure is made of six symmetrical inner concaves, and six faces of single cell structure are in umbrella-shaped structure,
Intermediate four isometric bevel edges are curved ribs on inner concave, and the orthogonal thereto arrangement of four curved ribs and top are intersected in any and form indent
Four support born of the same parents' arms are distributed in vertex of surface, each face surrounding, and every support born of the same parents arm is made of two bevel edges, and inner concavity, phase is presented
Support born of the same parents' arm is shared in adjacent two faces, has a connecting rod at each face fovea superior angular vertex, adjacent cell element is by sharing this
One connecting rod is attached, to form complete single cell structure.
The energy-absorption box box body is equipped with two inner concavity crumple grooves, the crumple groove edge at the trisection point of axial length
Box surface one week, and two crumple groove widths, the depth are identical.
The front mounting plate is bolted by flange and automobile buffer beam, before rear mounting plate is by flange and body of a motor car
Stringer is bolted.
The energy-absorption box box body, front and back mounting plate material made of steel alloy or aluminium alloy punch forming.
Support born of the same parents arm, curved ribs and the connecting rod of the interior concave polyhedron negative poisson's ratio single cell structure are square sections
Solid hopkinson bar.
The interior concave polyhedron negative poisson's ratio three-dimensional structure inner core is fixed with energy-absorption box box cavity surfaces stick.
The interior concave polyhedron negative poisson's ratio three-dimensional structure inner core is passed through by materials such as metal, plastic cement, foam or ceramics
Made of the rapid shaping techniques such as 3D printing.
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1
A kind of energy-absorption box based on interior concave polyhedron negative poisson's ratio three-dimensional structure inner core combined with Figure 1 and Figure 2, including preceding peace
Loading board 1, rear mounting plate 2, energy-absorption box box body 3 and the interior concave polyhedron negative poisson's ratio three-dimensional structure inner core 4 for being filled in box cavity.
Energy-absorption box box body 3 is shaped by the high-strength alloy steel plate cold stamping of 1.2 millimeters thicks, while being welded into section using spot-welding technology and being
The closed thin wall box body structure of rectangle, a length of 160mm of box body size, the wide and high respectively 280mm and 280mm in section.Energy-absorption box
Box body 3 is equipped with two inner concavity crumple grooves 301 at the trisection point of axial length, crumple groove 301 along 3 surface of box body one week,
Two crumple grooves 301 of same size are 6mm, and identical depth is 4mm.Induction slot can guide energy-absorption box to send out by design method
Raw deformation, so that energy-absorption box stabilization and sufficiently when colliding, so as to improve the energy absorption performance of energy-absorption box.Box
3 two end faces of body are equipped with flange, and flange is connect by spot welding with front mounting plate 1 and rear mounting plate 2.Front mounting plate 1 and rear installation
Plate 2 is equipped with flange, and front mounting plate 1 is bolted to connection on automobile buffer beam, rear 2 company of being bolted of mounting plate
It connects on automobile front longitudinal beam.Interior concave polyhedron negative poisson's ratio three-dimensional structure inner core 4 is fixed on energy-absorption box box by way of adhesion
The length of 3 surface of internal cavity of body, three-dimensional structure inner core 4 is consistent with box body length, width and height and 3 lumenal cross-section size of box body
Quite.
As shown in figure 3, concave polyhedron negative poisson's ratio three-dimensional structure inner core 4 is born by concave polyhedron in 7*7*4 in entire
401 periodic arrangement of Poisson's ratio single cell structure is formed by connecting, wherein totally 7 layers of length direction, every layer of width direction 4, height side
To 7.As shown in figure 4, each single cell structure 401 is made of six symmetrical inner concaves, each inner concave is in umbrella-shaped structure.
Four support born of the same parents arms 402 are distributed in surrounding, and every support born of the same parents arm is made of two bevel edges, every the length of the hypotenuse L1=20mm, and two
Angle α=150 ° between bevel edge, every support born of the same parents arm are shared by two neighboring face；Intermediate four isometric bevel edges are curved ribs
403, length L2=25mm, angle β=150 ° between opposite two curved ribs 403；Six roots of sensation connecting rod 404 is respectively perpendicular to six
A inner concave, every root long degree L3=15mm；Herein, the value of α and β can freely adjust within the scope of 90 ° -180 °, and each bevel edge is long
Variation meets structural relation and does not interfere degree therewith.Support born of the same parents' arm 402, curved ribs 403 and connecting rod 404 are all to have to put down
The square section solid beam on whole surface, sectional dimension are 3 × 3 millimeters.Multiple single cell structures 401 are on two direction of cross section
It is connected with each other by way of sharing adjacent unit cell connecting rod 404, to extend to form a continuous unit in the horizontal direction
Layer；Be connected with each other by way of shared connecting rod 404 in the multiple elementary layers of length direction, and so on to constitute in entire
Concave polyhedron negative poisson's ratio three-dimensional structure inner core 4.Negative poisson's ratio three-dimensional structure inner core 4 is to use but be not limited in the present embodiment
ABS plastic 3D printing forms.
Automobile with the present embodiment maintains lower impact force when low speed collision occurs, and has good pedestrian protecting
Can, crumple groove can guide quick crumple, improve the uniformity of overall deformation, be improved by stabilization, controllable crumple process
Energy absorbing efficiency enhances the protection to vehicle body rear part structure, has saved maintenance cost.And when high speed collision occurs for vehicle,
Material is radially contracted while negative poisson's ratio structure inner core axial direction crumple, and rigidity is presented under the action of Negative poisson's ratio and increases
Powerful feature generates higher plateau stress, absorbs more impact energys, and the energy-absorbing effect under high speed collision is significantly mentioned
It rises.
Claims (7)
1. a kind of energy-absorption box based on interior concave polyhedron negative poisson's ratio three-dimensional structure inner core, which is characterized in that including anti-with automobile
The front mounting plate of beam connection, the rear mounting plate connecting with automobile longitudinal girder, energy-absorption box box body are hit, and is filled in energy-absorption box box body
The interior concave polyhedron negative poisson's ratio three-dimensional structure inner core of chamber；The energy-absorption box box body is the closed thin wall structure that section is rectangle,
Both ends are connect with forward and backward mounting plate respectively；The single cell structure of the negative poisson's ratio three-dimensional structure is by six symmetrical inner concave groups
At six faces of single cell structure are in umbrella-shaped structure, and intermediate four isometric bevel edges are curved ribs on inner concave, and four curved ribs are in just
It hands over arrangement and top is intersected in and a little forms indent vertex of surface, four support born of the same parents' arms, every support born of the same parents are distributed in each face surrounding
Arm is made of two bevel edges, inner concavity is presented, two neighboring face is shared support born of the same parents' arm, had at each face fovea superior angular vertex
A piece connecting rod, adjacent cell element are attached by sharing this connecting rod, to form a complete single cell structure.
2. the energy-absorption box according to claim 1 based on interior concave polyhedron negative poisson's ratio three-dimensional structure inner core, which is characterized in that
The energy-absorption box box body is equipped with two inner concavity crumple grooves at the trisection point of axial length, and the crumple groove is along box surface
One week, and two crumple groove widths, the depth are identical.
3. the energy-absorption box according to claim 1 based on interior concave polyhedron negative poisson's ratio three-dimensional structure inner core, which is characterized in that
The front mounting plate is bolted by flange and automobile buffer beam, and rear mounting plate passes through flange and front longitudinal beam of automobile body bolt
Connection.
4. the energy-absorption box according to claim 1 based on interior concave polyhedron negative poisson's ratio three-dimensional structure inner core, which is characterized in that
The material of the energy-absorption box box body, front and back mounting plate is made of steel alloy or aluminium alloy punch forming.
5. the energy-absorption box according to claim 1 based on interior concave polyhedron negative poisson's ratio three-dimensional structure inner core, which is characterized in that
Support born of the same parents arm, curved ribs and the connecting rod of the interior concave polyhedron negative poisson's ratio single cell structure are square the solid hopkinson bar in section.
6. the energy-absorption box according to claim 1 based on interior concave polyhedron negative poisson's ratio three-dimensional structure inner core, which is characterized in that
The interior concave polyhedron negative poisson's ratio three-dimensional structure inner core is fixed with energy-absorption box box cavity surfaces stick.
7. the energy-absorption box according to claim 1 based on interior concave polyhedron negative poisson's ratio three-dimensional structure inner core, which is characterized in that
The interior concave polyhedron negative poisson's ratio three-dimensional structure inner core is made up of metal, plastic cement, foam or ceramics of 3D printing.
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| CN201910184512.0A CN109878443B (en) | 2019-03-12 | 2019-03-12 | Energy absorption box based on inner core with concave polyhedron negative Poisson ratio three-dimensional structure |
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| CN110744873A (en) * | 2019-11-22 | 2020-02-04 | 南京工业大学 | 3D printing structure composite material sandwich board with negative Poisson ratio effect and processing method |
| CN111017270A (en) * | 2019-12-20 | 2020-04-17 | 北京空间机电研究所 | Non-positive poisson ratio buffering energy-absorbing structure filled with round pipe |
| CN111516627A (en) * | 2020-04-15 | 2020-08-11 | 吉利汽车研究院（宁波）有限公司 | Energy absorption box, energy absorption performance optimization method and automobile |
| CN112249509A (en) * | 2020-09-01 | 2021-01-22 | 哈尔滨工业大学（深圳） | Energy-absorbing structure and energy-absorbing buffer device |
| CN112406756A (en) * | 2020-12-01 | 2021-02-26 | 大连理工大学 | Anticollision roof beam assembly based on jump single cell structure of bullet |
| CN112606495A (en) * | 2020-12-22 | 2021-04-06 | 北京理工大学 | Compound antiknock protective structure |
| CN112658256A (en) * | 2019-09-30 | 2021-04-16 | 河北工业大学 | Three-dimensional enhanced star structure |
| CN112895424A (en) * | 2021-01-14 | 2021-06-04 | 中南大学 | Three-dimensional negative Poisson ratio structure, additive manufacturing method, 3D printer and application |
| CN112922995A (en) * | 2019-12-06 | 2021-06-08 | 同济大学 | Composite energy absorption structure based on negative Poisson ratio structure |
| CN113808684A (en) * | 2020-06-16 | 2021-12-17 | 湖南大学 | Three-dimensional metamaterial structure with thermal expansion and Poisson's ratio capable of being regulated and controlled simultaneously and design method and application thereof |
| CN113991221A (en) * | 2021-10-25 | 2022-01-28 | 吉林大学 | Battery pack sandwich shell with negative Poisson ratio layered quadrilateral energy absorption structure |
| CN114635589A (en) * | 2022-03-14 | 2022-06-17 | 国网山东省电力公司莒县供电公司 | Protection type removes prefabricated transformer substation system |
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| CN112658256B (en) * | 2019-09-30 | 2024-05-07 | 河北工业大学 | Three-dimensional enhanced star-shaped structure |
| CN110744873A (en) * | 2019-11-22 | 2020-02-04 | 南京工业大学 | 3D printing structure composite material sandwich board with negative Poisson ratio effect and processing method |
| CN112922995B (en) * | 2019-12-06 | 2022-07-05 | 同济大学 | Composite energy absorption structure based on negative Poisson ratio structure |
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| CN111017270A (en) * | 2019-12-20 | 2020-04-17 | 北京空间机电研究所 | Non-positive poisson ratio buffering energy-absorbing structure filled with round pipe |
| CN111017270B (en) * | 2019-12-20 | 2021-12-07 | 北京空间机电研究所 | Non-positive poisson ratio buffering energy-absorbing structure filled with round pipe |
| CN111516627A (en) * | 2020-04-15 | 2020-08-11 | 吉利汽车研究院（宁波）有限公司 | Energy absorption box, energy absorption performance optimization method and automobile |
| CN113808684A (en) * | 2020-06-16 | 2021-12-17 | 湖南大学 | Three-dimensional metamaterial structure with thermal expansion and Poisson's ratio capable of being regulated and controlled simultaneously and design method and application thereof |
| CN112249509A (en) * | 2020-09-01 | 2021-01-22 | 哈尔滨工业大学（深圳） | Energy-absorbing structure and energy-absorbing buffer device |
| CN112249509B (en) * | 2020-09-01 | 2022-08-02 | 哈尔滨工业大学（深圳） | Energy-absorbing structure and energy-absorbing buffer device |
| CN112406756A (en) * | 2020-12-01 | 2021-02-26 | 大连理工大学 | Anticollision roof beam assembly based on jump single cell structure of bullet |
| CN112606495A (en) * | 2020-12-22 | 2021-04-06 | 北京理工大学 | Compound antiknock protective structure |
| CN112895424A (en) * | 2021-01-14 | 2021-06-04 | 中南大学 | Three-dimensional negative Poisson ratio structure, additive manufacturing method, 3D printer and application |
| CN113991221A (en) * | 2021-10-25 | 2022-01-28 | 吉林大学 | Battery pack sandwich shell with negative Poisson ratio layered quadrilateral energy absorption structure |
| CN113991221B (en) * | 2021-10-25 | 2023-09-22 | 吉林大学 | Battery pack sandwich shell with negative poisson ratio layered quadrilateral energy absorption structure |
| CN114635589A (en) * | 2022-03-14 | 2022-06-17 | 国网山东省电力公司莒县供电公司 | Protection type removes prefabricated transformer substation system |
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| CN115325069A (en) * | 2022-07-02 | 2022-11-11 | 三峡大学 | Assembled concave negative Poisson's ratio metamaterial |
| CN116920169A (en) * | 2023-07-19 | 2023-10-24 | 北京科技大学 | Three-dimensional negative poisson ratio metamaterial unit cell and array structure and manufacturing method thereof |
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