CN112428949B - Recoverable car energy-absorbing box that warp based on vibration material disk - Google Patents
Recoverable car energy-absorbing box that warp based on vibration material disk Download PDFInfo
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- CN112428949B CN112428949B CN202011408103.3A CN202011408103A CN112428949B CN 112428949 B CN112428949 B CN 112428949B CN 202011408103 A CN202011408103 A CN 202011408103A CN 112428949 B CN112428949 B CN 112428949B
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- thin
- wall shell
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- filling structure
- energy absorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/24—Arrangements for mounting bumpers on vehicles
- B60R19/26—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means
- B60R19/34—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means destroyed upon impact, e.g. one-shot type
Abstract
The invention discloses a restorable automobile energy absorption box based on additive manufacturing, which comprises an upper end cover, a filling structure, a thin-wall shell, a mounting plate and a thin-wall corrugated pipe, wherein the mounting plate is arranged at the bottom of the thin-wall shell, a plurality of mounting holes are formed in the mounting plate, the filling structure is arranged in the thin-wall shell, the thin-wall corrugated pipe is arranged in the filling structure, and the upper end cover is arranged at the top of the thin-wall shell; the thin-wall shell is detachably connected with the automobile anti-collision beam through the mounting hole, and the filling structure, the thin-wall shell and the thin-wall corrugated pipe are integrally printed and formed by high-entropy alloy materials; the filling structure provided by the invention is a regular hexahedron, wherein four edges of two opposite surfaces of the regular hexahedron are respectively connected with other four unit cell structures in different directions, so that the bearing capacity of the energy absorption box is improved while the energy absorption is improved, the stability and the continuity of the energy absorption are kept, the bearing capacity is high, the stability is good, the filling structure can be repeatedly used, and the maintenance cost of an automobile is reduced.
Description
Technical Field
The invention relates to the field of passive safety of automobiles, in particular to a recoverable deformation automobile energy absorption box based on material increase manufacturing.
Background
In recent years, with the rapid growth of Chinese science and technology, the living standard of people is greatly improved, the holding capacity of automobiles in China is rapidly increased, and according to statistics, 238351 caused by traffic accidents occur nationwide in 2019, and the number of dead people is 67759; the direct property loss is 9.1 million yuan, so the safety of the automobile becomes a more and more concerned problem in the development of the automobile, and the research on the automobile energy absorption box has important significance for guaranteeing the life and property safety of driving and passengers.
The energy absorption box is an energy absorption device in the bumper, when collision occurs, energy absorption is realized through self compression deformation, peak collision force is reduced, and accordingly injury to passengers is reduced.
In view of the current research situation of the energy absorption box, the automobile energy absorption box capable of recovering deformation and high energy absorption efficiency is designed by taking the honeycomb structure in nature as a reference, introducing an intelligent deformation material which is high-entropy alloy and can recover deformation and has high strength and adopting an additive manufacturing method.
Disclosure of Invention
The invention aims to provide a restorable automobile energy absorption box based on additive manufacturing, and solves the problems that the traditional energy absorption box is low in energy absorption efficiency, and the deformation of the energy absorption box cannot be restored, so that the automobile maintenance cost is high, and the like.
A restorable automobile energy absorption box based on additive manufacturing comprises an upper end cover, a filling structure, a thin-wall shell, a mounting plate and a thin-wall corrugated pipe, wherein the mounting plate is arranged at the bottom of the thin-wall shell, a plurality of mounting holes are formed in the mounting plate, the filling structure is arranged in the thin-wall shell, the thin-wall corrugated pipe is arranged in the filling structure, and the upper end cover is arranged at the top of the thin-wall shell; the thin-wall shell is detachably connected with the automobile anti-collision beam through the mounting hole;
the thin-wall shell is of a square tube structure comprising four side walls, and the outer side wall of the thin-wall shell is provided with two induction grooves;
the induction grooves extend along the direction parallel to the upper surface of the thin-wall shell on the side surface of the thin-wall shell and are sunken towards the interior of the thin-wall shell, and the induction grooves are uniformly distributed on the side surface of the thin-wall shell;
the filling structure, the thin-wall shell and the thin-wall corrugated pipe are integrally printed and formed by high-entropy alloy materials;
specifically, the high-entropy alloy is an alloy composed of a plurality of elements, the mixture ratio of the elements is equal to or close to the equal atomic ratio, and the high-entropy alloy is prepared by the method (TiZrHf)50(NiCoCu)50The high-entropy alloy has stronger plastic deformation resistance and can effectively improveThe bearing capacity of the energy absorption box, and the high-entropy alloy provided by the invention is an alloy with shape memory property, and the high-entropy alloy has higher strength due to unique high-entropy effect, delayed diffusion effect, lattice distortion effect and cocktail effect; the material has the characteristic of being restored to the original shape by heating after being deformed, which is mainly because the mutual transformation of two crystal phases of martensite and austenite exists when the external force or the temperature is changed, thereby realizing the deformation restoration of the material;
the filling structure comprises 4 combined unit structures, wherein the 4 combined unit structures are distributed in a circular array by taking a central shaft of the thin-wall shell as a center, the array angle is 90 degrees, and the combined unit structures of the new array are kept to be completely overlapped with the upper bottom surfaces of the original combined unit structures;
the combined unit structure comprises a plurality of unit structures, the unit structures are arranged in an array mode in a longitudinal plane, and the lower side of the original structure is completely overlapped with the upper side of the array structure;
the unit structure comprises two regular hexagonal cells and a cell rod, wherein the two regular hexagonal cells are connected through the cell rod, and the length of the cell rod is the same as the side length of the regular hexagonal cells.
The invention has the beneficial effects that:
1. the energy absorption characteristic is excellent. Different from the arrangement of a common honeycomb structure, the filling structure provided by the invention is a regular hexahedron, wherein four edges of two opposite surfaces of the regular hexahedron are respectively connected with other four unit cell structures in different directions, so that the bearing capacity of the energy absorption box is improved while the energy absorption is improved, and the stability and the continuity of the energy absorption are kept.
2. The initial peak force is reduced. The thin-wall shell is provided with two inwards-sunken induction grooves, so that buckling deformation of the thin-wall shell can be effectively guided, stability of crumpling deformation in a collision process is guaranteed, initial peak force is reduced, and personal safety of passengers is effectively guaranteed.
3. High bearing capacity and high stability. The high-entropy alloy is an alloy consisting of multiple elements, and the interaction of solute atoms and dislocation generates the phenomenon of improving the strength and hardness, so that the bearing capacity of the energy absorption box can be effectively improved, and the bearing stability of the energy absorption box is improved.
4. Can be repeatedly used, and the maintenance cost of the automobile is reduced. The filling structure is made of high-entropy alloy, and the high-entropy alloy is a material with shape memory and can automatically recover to the original shape at a certain temperature. According to the characteristic, after the energy absorption box absorbs energy and deforms, the energy absorption box is heated to restore the original shape, so that the energy absorption box can be repeatedly used, and the maintenance cost of the automobile is reduced.
5. The material is manufactured by adopting an additive manufacturing technology, materials are piled up into a solid body layer by layer through three-dimensional model data, a complex sample is manufactured rapidly and precisely, the production link is simplified, the manufacturing period is shortened, the automobile maintenance is convenient, and the material is suitable for new requirements of automobile development.
Drawings
FIG. 1 is a structural schematic of the present invention;
FIG. 2 is a schematic view of the internal structure of the present invention;
FIG. 3 is an overall schematic view of the fill structure of the present invention;
FIG. 4 is an overall schematic view of the bellows of the present invention;
FIG. 5 is a schematic diagram of the combined unit structure of the present invention;
FIG. 6 is a schematic diagram of the cell structure of the present invention.
Detailed Description
Referring to fig. 1 to 6, a recoverable deformation automobile energy absorption box based on additive manufacturing comprises an upper end cover 1, a filling structure 2, a thin-wall shell 3, a mounting plate 4 and a thin-wall corrugated pipe 6, wherein the mounting plate 4 is arranged at the bottom of the thin-wall shell 3, the mounting plate 4 is provided with a plurality of mounting holes 5, the filling structure 2 is arranged inside the thin-wall shell 3, the thin-wall corrugated pipe 6 is arranged inside the filling structure 2, and the upper end cover 1 is arranged at the top of the thin-wall shell 3; the thin-wall shell 3 is detachably connected with the automobile anti-collision beam through a mounting hole 5;
the thin-wall shell 3 is of a square tube structure comprising four side walls, and two induction grooves 31 are formed in the outer side wall of the thin-wall shell 3;
the induction grooves 31 extend along the direction parallel to the upper surface of the thin-wall shell 3 on the side surface of the thin-wall shell 3, and are sunken towards the inside of the thin-wall shell 1, and the induction grooves 31 are uniformly distributed on the side surface of the thin-wall shell 3;
the filling structure 2, the thin-wall shell 3 and the thin-wall corrugated pipe 6 are integrally printed and formed by high-entropy alloy materials;
specifically, the selective laser cladding technology is adopted for the experiment to be integrally printed and formed, a three-dimensional drawing software CATIA is used for drawing a model of a sample piece, the sample piece is digitally edited, then the three-dimensional model is cut into a plurality of thin layers by using layered slicing software, the cross sections are printed layer by using powdery alloy, all the cross sections are adhered in various modes, and then post-treatment such as stripping, polishing and the like is needed, so that an entity is manufactured, the additive manufacturing technology can realize accurate printing of complex sample pieces, and the manufacturing period is shortened;
specifically, (TiZrHf)50(NiCoCu)50The high-entropy alloy is a shape memory alloy, contains a plurality of component elements, has good bearing capacity, good contact strength and structural stability and can improve the load level of the energy absorption box due to the phenomenon of improving the strength and the hardness caused by the interaction of solute atoms and dislocation. Meanwhile, due to the phenomenon of stress-induced martensite phase transformation/reverse transformation under the condition of compression or tension, the material has the shape memory effect, so that the energy absorption box is recycled, the resource utilization rate is improved, and the new requirements of automobile development are met;
specifically, the high-entropy alloy is prepared by mixing powder, weighing Ni, Zr, Hf, Co, Ni and Cu metal powder according to proportion, uniformly mixing, and carrying out vacuum ball milling for more than 3h to obtain (TiZrHf)50(NiCoCu)50High entropy alloy powder;
the filling structure 2 comprises 4 combined unit structures 21, wherein the 4 combined unit structures 21 are distributed in a circular array by taking the central axis of the thin-wall shell 3 as the center, the array angle is 90 degrees, and the combined unit structures 21 of a new array are kept to be completely overlapped with the upper bottom surfaces of the original combined unit structures 21;
the combined unit structure 21 comprises a plurality of unit structures 211, the unit structures 211 are arranged in an array in a longitudinal plane, and the lower sides of the original structures are completely overlapped with the upper sides of the array structures;
the unit structure 211 comprises two regular hexagonal cells 2111 and a cell bar 2112, the two regular hexagonal cells 2111 are connected by the cell bar 2112, and the length of the cell bar 2112 is the same as the side length of the regular hexagonal cell 2111.
The working principle and the process of the invention are as follows:
referring to fig. 1 to 6, in use, when an automobile collides, the thin-wall shell 3, the filling structure 2 and the corrugated pipe 6 of the energy absorption box absorb energy through compression deformation, so that the initial peak force is reduced, and the injury to passengers is reduced; after the energy absorption box is plastically deformed, the energy absorption box is detached from the automobile through the mounting plate and is heated to Af(austenite phase transition temperature termination point) to restore the original state, thereby realizing the recycling.
The invention fully combines the advantages of each thin-wall structure, the cross section of the thin-wall shell is quadrilateral, the initial peak force can be effectively reduced, and the injury to passengers is reduced; the cross section of the thin-wall corrugated pipe structure is circular, so that the comprehensive optimal performance is achieved, the corrugated pipe can effectively induce the structure to generate buckling deformation, and the stability of the structure is guaranteed.
Claims (1)
1. The utility model provides a recoverable car crash box that warp based on vibration material disk which characterized in that: the filling structure comprises an upper end cover (1), a filling structure (2), a thin-wall shell (3), a mounting plate (4) and a thin-wall corrugated pipe (6), wherein the mounting plate (4) is arranged at the bottom of the thin-wall shell (3), a plurality of mounting holes (5) are formed in the mounting plate (4), the filling structure (2) is arranged inside the thin-wall shell (3), the thin-wall corrugated pipe (6) is arranged inside the filling structure (2), and the upper end cover (1) is arranged at the top of the thin-wall shell (3); the thin-wall shell (3) is detachably connected with the automobile anti-collision beam through a mounting hole (5);
the thin-wall shell (3) is of a square-tube structure comprising four side walls, and two induction grooves (31) are formed in the outer side wall of the thin-wall shell (3);
the induction grooves (31) extend along the direction parallel to the upper surface of the thin-wall shell (3) on the side surface of the thin-wall shell (3) and are sunken towards the inside of the thin-wall shell (3), and the induction grooves (31) are uniformly distributed on the side surface of the thin-wall shell (3);
the filling structure (2), the thin-wall shell (3) and the thin-wall corrugated pipe (6) are integrally printed and formed by high-entropy alloy materials;
the filling structure (2) comprises 4 combined unit structures (21), the 4 combined unit structures (21) are distributed in a circular array by taking the central axis of the thin-wall shell (3) as the center, the array angle is 90 degrees, and the combined unit structures (21) of the new array are kept to be completely coincided with the upper bottom surfaces of the original combined unit structures (21);
the combined unit structure (21) comprises a plurality of unit structures (211), the unit structures (211) are arranged in an array mode in a longitudinal plane, and the lower edge of the original structure is completely overlapped with the upper edge of the array structure;
the unit structure (211) comprises two regular hexagonal cells (2111) and a cell bar (2112), the two regular hexagonal cells (2111) are connected through the cell bar (2112), and the length of the cell bar (2112) is the same as the side length of the regular hexagonal cell (2111).
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| CN202011408103.3A CN112428949B (en) | 2020-12-05 | 2020-12-05 | Recoverable car energy-absorbing box that warp based on vibration material disk |
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| CN202011408103.3A CN112428949B (en) | 2020-12-05 | 2020-12-05 | Recoverable car energy-absorbing box that warp based on vibration material disk |
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| CN112428949B true CN112428949B (en) | 2022-05-13 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113339440A (en) * | 2021-05-26 | 2021-09-03 | 吉林大学 | Multidirectional bearing honeycomb buffering combined energy absorption structure of imitated football alkene structure |
| CN114228651A (en) * | 2021-12-10 | 2022-03-25 | 重庆交通大学绿色航空技术研究院 | Light-weight automobile energy absorption box with lattice structure |
| CN114407816A (en) * | 2021-12-17 | 2022-04-29 | 中国科学技术大学 | Foam metal filling pipe buffering energy-absorbing structure capable of controlling energy absorption and initial peak value |
| CN116398567B (en) * | 2023-03-27 | 2023-09-22 | 江苏科技大学 | Corrugated thin-wall three-layer buffering energy-absorbing structure and manufacturing method thereof |
| CN117104389B (en) * | 2023-10-23 | 2023-12-26 | 吉林大学 | Preparation method of vibration-damping submarine pressure-resistant shell capable of recovering shape |
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| CN110645298A (en) * | 2019-09-17 | 2020-01-03 | 吉林大学 | Double-platform filling structure with double protection |
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| KR101073953B1 (en) * | 2009-11-26 | 2011-10-17 | 주식회사 성우하이텍 | Crash box in automotive bumper system |
| CN106960096B (en) * | 2017-03-24 | 2020-06-09 | 哈尔滨工业大学 | Three-dimensional negative-stiffness honeycomb structure and preparation method thereof |
| CN107856743A (en) * | 2017-10-31 | 2018-03-30 | 南京理工大学 | Vehicle energy absorption box based on periodic cellular structure inner core |
| CN109591743B (en) * | 2018-11-22 | 2021-11-02 | 华侨大学 | Automobile collision energy absorption box capable of efficiently and stably absorbing energy |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110645298A (en) * | 2019-09-17 | 2020-01-03 | 吉林大学 | Double-platform filling structure with double protection |
| CN111660977A (en) * | 2020-06-30 | 2020-09-15 | 华侨大学 | Energy absorption box |
Non-Patent Citations (1)
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| 基于NiTi合金的仿生防护结构自恢复特性;于征磊等;《吉林大学学报(工学版)》;20200531;第50卷(第03期);第1138-1143页 * |
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