CN221213869U - Sandwich filling light energy-absorbing box resistant to multi-angle impact - Google Patents
Sandwich filling light energy-absorbing box resistant to multi-angle impact Download PDFInfo
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- CN221213869U CN221213869U CN202323549367.2U CN202323549367U CN221213869U CN 221213869 U CN221213869 U CN 221213869U CN 202323549367 U CN202323549367 U CN 202323549367U CN 221213869 U CN221213869 U CN 221213869U
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- 239000011241 protective layer Substances 0.000 claims abstract description 22
- 238000010521 absorption reaction Methods 0.000 claims abstract description 18
- 239000010410 layer Substances 0.000 claims abstract description 16
- 239000011229 interlayer Substances 0.000 claims abstract description 15
- 230000035939 shock Effects 0.000 claims abstract description 6
- 239000006096 absorbing agent Substances 0.000 claims description 10
- 229910000838 Al alloy Inorganic materials 0.000 claims description 8
- 229910003460 diamond Inorganic materials 0.000 claims description 3
- 239000010432 diamond Substances 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 3
- 230000001413 cellular effect Effects 0.000 claims description 2
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- 230000002195 synergetic effect Effects 0.000 abstract description 2
- 210000004027 cell Anatomy 0.000 description 21
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 210000004754 hybrid cell Anatomy 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000003733 fiber-reinforced composite Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses a multi-angle impact resistant interlayer filling light energy-absorbing box, which is sequentially provided with an outer protective layer, an impact resistant interlayer, an inner protective layer and a filling energy-absorbing layer from outside to inside; the shock-resistant interlayer is formed by filling mixed cells with three-period minimum curved surface structures in a lattice array mode, and the mixed cells comprise an IWP type structure and an FRD type structure; the filling energy-absorbing layer consists of a plurality of round tubes with negative poisson ratio, and a three-period minimum curved surface structure with gradient change of density in the forward impact direction is filled in the round tubes with negative poisson ratio. The utility model effectively improves the deformation stability of the energy-absorbing box structure and the synergistic effect between the structures, improves the energy absorption efficiency, has better crashworthiness and energy-absorbing property, and solves the problems of unstable compression deformation, insufficient impact resistance, limited energy-absorbing efficiency and the like of the existing energy-absorbing box.
Description
Technical Field
The utility model belongs to the technical field of automobile collision protection, and particularly relates to a sandwich filling light energy-absorbing box resistant to multi-angle impact.
Background
Automotive crash boxes are typically made of aluminum alloys for absorbing a portion of the energy during a collision to reduce the impact's injury to the vehicle beam and occupants within the vehicle. The existing energy-absorbing boxes have serious defects: firstly, most of the energy-absorbing boxes are single metal thin-wall components, and when the collision force is overlarge, the compression deformation is unstable, so that the energy-absorbing effect is reduced; secondly, most of the energy-absorbing boxes at present only have good energy-absorbing effect in the collapse direction and cannot well bear impact from all directions; furthermore, the existing energy-absorbing boxes have limited energy-absorbing efficiency during collision, and cannot completely avoid damage to vehicles and personnel.
In the prior art, more advanced materials or optimized structural design are often adopted, so that the performance of the energy absorption box is improved. The material aspect such as fiber reinforced composite material, polymer material, etc. can improve energy absorption efficiency and intensity, and possess light in weight and durability's characteristics. In the aspect of the structure, in order to adapt to different collision conditions and realize better collision buffering and protection effects, various shapes and structural designs are often needed, and different structural designs correspond to different collision angles and forces and have different effects. Therefore, how to optimize the energy absorption box, improve the production efficiency and reduce the cost is a key for promoting the energy absorption box to be popularized and applied in the field of automobiles.
Disclosure of utility model
The utility model aims to overcome the defects of the prior art, provides a multi-angle impact resistant interlayer filling light energy-absorbing box, and solves the problems of unstable compression deformation, insufficient impact resistance, limited energy-absorbing efficiency and the like in the prior art.
The technical scheme adopted for solving the technical problems is as follows: the sandwich filling light energy-absorbing box is provided with an outer protective layer, an impact-resistant sandwich layer, an inner protective layer and a filling energy-absorbing layer from outside to inside in sequence;
The shock-resistant interlayer is formed by filling mixed cells with three-period minimum curved surface structures in a lattice array mode, and the mixed cells comprise an IWP type structure and an FRD type structure; the filling energy absorption layer consists of a plurality of round tubes with negative poisson ratio, cells with three-period minimum curved surface structures are filled in the round tubes with negative poisson ratio, and the density of the cells distributed in the forward impact direction changes in a gradient mode.
In the utility model, the mixed cell is formed by mixing an IWP type structure and an FRD type structure in a quantity ratio of 4:6.
In the utility model, the implicit equation of the curved surface of the three-period minimum curved surface structure of the hybrid cell of the shock-resistant interlayer is as follows:
Where sin is a triangular sine function, cos is a triangular cosine function, x, y, z are coordinates of each curved surface point in a Cartesian coordinate system, and l is a single three-period minimum curved surface cell side length.
In the utility model, the negative poisson ratio round tubes are arranged along the length direction of the outer protective layer (namely the stretching direction of the shell) so that the axial direction of the negative poisson ratio round tubes is parallel to the positive impact direction.
In the utility model, the cell filled with the energy absorption layer is of a diamond structure, and the implicit equation of the curved surface of the three-period minimum curved surface structure is as follows:
Where sin is a triangular sine function, cos is a triangular cosine function, x, y, z are coordinates of each curved surface point in a Cartesian coordinate system, and l is a single three-period minimum curved surface cell side length.
In the utility model, the round tube with negative poisson ratio is formed by arranging three units with negative poisson ratio from top to bottom in a dot matrix mode and then curling the three units.
In the utility model, the three negative poisson ratio units are a concave honeycomb unit, an elliptic unit and a concave hyperbolic unit in sequence.
In the utility model, the three-period minimum curved surface structure filled in the negative poisson ratio circular tube is composed of the following gradient functions:
Where ρ 1 is the starting density, ρ 2 is the ending density, and Z max is the structure forward impact direction length.
In the utility model, the outer protective layer and the inner protective layer are of thin-wall structures with rectangular cross sections, and are made of aluminum alloy.
Compared with the background technology, the technical proposal has the following advantages:
1. Has better impact resistance
The energy-absorbing box adopts an interlayer design of an inner protective layer and an outer protective layer, and a three-period minimum curved surface structure of mixed cell lattice arrangement is filled in the protective layer, and the mixed cells combine the advantages of IWP and FRD cells and display isotropy, so that the arranged lattice structure can well bear impact from all directions, and safer protection is provided.
2. Excellent crashworthiness and energy absorption
According to the scheme, the inner filling layer of the energy-absorbing box adopts the design of a gradient negative poisson ratio tube filling density gradient three-period minimum structure, and the design can improve the deformation stability of the structure and the synergistic effect between the structures, improve the energy absorption efficiency and further show better crashworthiness and energy absorption.
3. Has excellent stability and light weight characteristics
The existence of the shock-resistant interlayer and the filling layer in the energy-absorbing box greatly improves the bearing stability of the structure, and the gradient design ensures that the structure can still keep a good deformation mode under high-speed impact; the porous characteristic of the three-period minimum curved surface structure and the lightweight characteristic can be well ensured by adopting the aluminum alloy material for the structure. And because of the good heat conduction effect of the aluminum alloy, the aluminum alloy can ensure that the aluminum alloy can rapidly conduct energy to the outside in a heat energy mode when absorbing the energy, and avoid the risks of explosion and the like caused by local overheating. In addition, the mechanical property of aluminum can still be kept unchanged in a low-temperature state, so that the aluminum can be effectively ensured to normally play an energy absorption role in severe weather.
Drawings
FIG. 1 is a schematic illustration of the positions of an energy absorber box and a beam;
FIG. 2 is a diagram of the internal structure of the crash box;
FIG. 3 is a schematic diagram of a hybrid of three-period very small curved cells of an impact resistant layer;
FIG. 4 is a schematic diagram of a mixed cell array arrangement of FIG. 3;
FIG. 5 is a schematic diagram of an energy absorbing structure filled with an energy absorbing layer;
Fig. 6 a-b are schematic diagrams of three negative poisson's ratio cell lattice arrangements and a gradient negative poisson's ratio tube;
Fig. 7 a-c are schematic diagrams of cells, density gradient changes and arrangement of a gradient three-period minimum curved surface structure.
The vehicle beam 1, the energy absorption box 2, the outer protective layer 201, the impact-resistant interlayer 202, the inner protective layer 203, the filling energy absorption layer 204, the negative poisson ratio round tube 301 and the gradient three-period minimum curved surface structure 302.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model; it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments, and that all other embodiments obtained by persons of ordinary skill in the art without making creative efforts based on the embodiments in the implementation of the present utility model are within the scope of protection of the implementation of the present utility model.
Example 1
The embodiment provides a sandwich filling light energy-absorbing box resistant to multi-angle impact. As shown in fig. 1, the crash box 2 is fixedly connected with the vehicle beam 1. In fig. 2, the energy absorption box 2 is sequentially provided with an outer protective layer 201, an impact-resistant interlayer 202, an inner protective layer 203 and a filling energy absorption layer 204 from outside to inside.
Considering the collision peak force and the energy absorption effect, the outer protective layer 201 and the inner protective layer 203 are both of rectangular thin-wall structures; in order to ensure the light weight and stable characteristics of the structure, all the structures are made of aluminum alloy materials.
As shown in fig. 4, the anti-impact interlayer 202 is formed by filling a mixed cell with a three-period minimum curved surface structure in a lattice array. As shown in fig. 3, the hybrid cell (right) in this embodiment includes an IWP type structure (left) and an FRD type structure (middle), where the IWP and FRD hybrid ratio is 4:6. the implicit equation of the curved surface of the mixed cell three-period minimum curved surface structure is as follows:
Where sin is a triangular sine function, cos is a triangular cosine function, x, y, z are coordinates of each curved surface point in a Cartesian coordinate system, and l is a single three-period minimum curved surface cell side length.
The filling energy absorbing layer 204 is composed of a plurality of round tubes 301 with negative poisson's ratio, and the round tubes 301 with negative poisson's ratio are arranged along the length direction (i.e. the stretching direction of the shell) of the outer protective layer 201, so that the axial direction of the round tubes 301 with negative poisson's ratio is parallel to the positive impact direction. The cells filled in the round tube 301 with negative poisson ratio are of a diamond structure, and the implicit equation of the curved surface of the three-period minimum curved surface structure is as follows:
Where sin is a triangular sine function, cos is a triangular cosine function, x, y, z are coordinates of each curved surface point in a Cartesian coordinate system, and l is a single three-period minimum curved surface cell side length.
As shown in fig. 6 a and b, the round tube 301 with negative poisson ratio is formed by rolling three negative poisson ratio units, which are a concave cellular unit, an elliptic unit and a concave hyperbolic unit in sequence, after being arranged from top to bottom in a dot matrix manner, and each unit is repeated once in this embodiment. The three-period minimum curved surface structure 302 inside the round tube 301 with negative poisson ratio is in a cylindrical structure, as shown in fig. 7, and is formed by arranging single cell lattices, the relative density of the three-period minimum curved surface structure changes in a gradient manner, the relative density changes from ρ 1 to ρ 2 from top to bottom, and the gradient function is as follows:
Where ρ 1 is the starting density, ρ 2 is the ending density, and Z max is the structure forward impact direction length.
The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.
Claims (10)
1. Multi-angle impact resistant interlayer filling light energy-absorbing box, which is characterized in that: an outer protective layer, an anti-impact interlayer, an inner protective layer and a filling energy-absorbing layer are sequentially arranged from outside to inside;
The shock-resistant interlayer is formed by filling mixed cells with three-period minimum curved surface structures in a lattice array mode, and the mixed cells comprise an IWP type structure and an FRD type structure; the filling energy absorption layer consists of a plurality of round tubes with negative poisson ratio, cells with three-period minimum curved surface structures are filled in the round tubes with negative poisson ratio, and the density of the cells distributed in the forward impact direction changes in a gradient mode.
2. The multi-angle impact resistant sandwich-filled lightweight energy absorber cartridge of claim 1, wherein: the mixed cell is formed by mixing an IWP type structure and an FRD type structure according to the number ratio of 4:6.
3. The multi-angle impact resistant sandwich-filled lightweight energy absorber cartridge of claim 1, wherein: the implicit equation of the curved surface of the mixed cell three-period minimum curved surface structure of the shock-resistant interlayer is as follows:
Where sin is a triangular sine function, cos is a triangular cosine function, x, y, z are coordinates of each curved surface point in a Cartesian coordinate system, and l is a single three-period minimum curved surface cell side length.
4. The multi-angle impact resistant sandwich-filled lightweight energy absorber cartridge of claim 1, wherein: the round tubes with negative poisson ratio are distributed along the length direction of the outer protective layer.
5. The multi-angle impact resistant sandwich-filled lightweight energy absorber cartridge of claim 1, wherein: the negative poisson ratio round tube is formed by three negative poisson ratio units which are arranged in a dot matrix from top to bottom and then curled.
6. The multi-angle impact resistant sandwich-filled lightweight energy absorber cartridge of claim 5, wherein: the three negative poisson ratio units are a concave cellular unit, an elliptic unit and a concave hyperbolic unit in sequence.
7. The multi-angle impact resistant sandwich-filled lightweight energy absorber cartridge of claim 1, wherein: the implicit equation of the curved surface of the cell three-period minimum curved surface structure filled with the energy absorption layer is as follows:
Where sin is a triangular sine function, cos is a triangular cosine function, x, y, z are coordinates of each curved surface point in a Cartesian coordinate system, and l is a single three-period minimum curved surface cell side length.
8. The multi-angle impact resistant sandwich-filled lightweight energy absorber cartridge of claim 1, wherein: and cells filled in the round tube with the negative poisson ratio are of a diamond structure.
9. The multi-angle impact resistant sandwich-filled lightweight energy absorber cartridge of claim 1, wherein: the density gradient function of cell arrangement inside the negative poisson ratio circular tube is as follows:
Where ρ 1 is the starting density, ρ 2 is the ending density, and Z max is the structure forward impact direction length.
10. The multi-angle impact resistant sandwich-filled lightweight energy absorber cartridge of claim 1, wherein: the outer protective layer and the inner protective layer are of thin-wall structures with rectangular cross sections, and are made of aluminum alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323549367.2U CN221213869U (en) | 2023-12-26 | 2023-12-26 | Sandwich filling light energy-absorbing box resistant to multi-angle impact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323549367.2U CN221213869U (en) | 2023-12-26 | 2023-12-26 | Sandwich filling light energy-absorbing box resistant to multi-angle impact |
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| Publication Number | Publication Date |
|---|---|
| CN221213869U true CN221213869U (en) | 2024-06-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323549367.2U Active CN221213869U (en) | 2023-12-26 | 2023-12-26 | Sandwich filling light energy-absorbing box resistant to multi-angle impact |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221213869U (en) |
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2023
- 2023-12-26 CN CN202323549367.2U patent/CN221213869U/en active Active
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