CN111301525A - Automobile front longitudinal beam filled with negative Poisson ratio honeycomb material - Google Patents
Automobile front longitudinal beam filled with negative Poisson ratio honeycomb material Download PDFInfo
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- CN111301525A CN111301525A CN201911267101.4A CN201911267101A CN111301525A CN 111301525 A CN111301525 A CN 111301525A CN 201911267101 A CN201911267101 A CN 201911267101A CN 111301525 A CN111301525 A CN 111301525A
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- longitudinal beam
- front longitudinal
- negative poisson
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- automobile
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
- B62D21/15—Understructures, i.e. chassis frame on which a vehicle body may be mounted having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body
Abstract
The invention provides an automobile front longitudinal beam filled with a negative poisson ratio cellular material, which comprises a front longitudinal beam shell, wherein a cavity in the front longitudinal beam shell is filled with the negative poisson ratio cellular structure material, and the negative poisson ratio cellular structure material is connected with the front longitudinal beam shell and is enclosed into a plurality of cells. The structure of the invention can improve the mechanical property of the front longitudinal beam of the automobile, further improve the energy absorption effect, well adapt to the impact at high speed and low speed, well induce the deformation of the front longitudinal beam when impacted, and have reliable performance.
Description
Technical Field
The invention belongs to the technical field of automobile part design, and particularly relates to an automobile front longitudinal beam filled with a negative Poisson ratio honeycomb material.
Background
With the rapid development of electric vehicles, in order to improve the driving range of electric vehicles and reduce energy consumption, light weight becomes an increasingly important part of vehicle design, but the strength of automobile part structures needs to be emphasized while realizing light weight, which is one of the subjects of current research and design.
The front longitudinal beam of the automobile is an important part of an automobile body structure for absorbing collision energy, the front end part of the front longitudinal beam is connected with an energy absorption box of a bumper system through a bolt, and the rear end part of the front longitudinal beam is connected with the floor of the automobile body through welding. The automobile front collision safety protection device is one of an important bearing unit, a force transmission part and an energy absorber of an automobile body, and the design of the automobile front collision safety protection device has great influence on the automobile front collision safety.
The ideal design of the front longitudinal beam of the automobile cannot ensure that the front longitudinal beam is too soft, otherwise, the living space of passengers cannot be effectively protected; the front longitudinal beam cannot be designed to be too rigid, so that the acceleration response of the vehicle is too large, secondary damage is caused to passengers, and the ideal design of the front longitudinal beam of the automobile should find balance between the two points.
The existing front longitudinal beam structure of the automobile mostly adopts a steel plate stamping forming technology, and is mostly a thin-wall beam through the steel plate stamping forming, so that the front longitudinal beam structure has the defects that the front longitudinal beam structure is easy to bend in the high-speed collision process, the good crushing, crumpling and deformation effects cannot be obtained, and the energy absorption efficiency is poor; at low speeds, protection of pedestrians on the road is also very limited.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an automobile front longitudinal beam filled with a negative poisson ratio honeycomb material, wherein the automobile front longitudinal beam is filled with the negative poisson ratio honeycomb structure material, so that the automobile front longitudinal beam has stronger collision energy absorption capacity and better deformation effect.
The technical scheme adopted by the invention for solving the technical problems is as follows: the automobile front longitudinal beam filled with the negative Poisson ratio cellular material is characterized by comprising a front longitudinal beam shell, wherein a cavity in the front longitudinal beam shell is filled with the negative Poisson ratio cellular structure material, and the negative Poisson ratio cellular structure material is connected with the front longitudinal beam shell and is enclosed into a plurality of cells.
According to the scheme, the cross section of each single cell is concave hexagon and trapezoid.
According to the scheme, the concave angle of the single cell element is 150 degrees.
According to the scheme, the negative Poisson ratio honeycomb structure material is perpendicular to the upper wall surface and the lower wall surface of the front longitudinal beam shell.
According to the scheme, the inward concave direction of the single cell element of the negative Poisson ratio honeycomb structure material is vertical to the force transmission direction of the front longitudinal beam when the automobile is subjected to frontal collision.
According to the scheme, the negative Poisson ratio honeycomb structure material and the front longitudinal beam shell are made of the same aluminum profiles.
According to the scheme, the negative Poisson ratio honeycomb structure material is connected with the front longitudinal beam shell through welding or rivets.
The invention has the beneficial effects that: the automobile front longitudinal beam filled with the negative Poisson ratio honeycomb material can improve the energy absorption capacity of the front longitudinal beam by filling the material with the negative Poisson ratio honeycomb structure in the front longitudinal beam, and due to the characteristic of the negative Poisson ratio honeycomb structure, the proportion of the kinetic energy of the honeycomb in the energy absorption is also obviously increased along with the improvement of the front impact speed of an automobile, and the honeycomb structure also has stronger energy absorption capacity. In addition, along with the impact velocity from low to high, the local deformation area gradually concentrates on the impact end, thereby being capable of better inducing the deformation of the front longitudinal beam when being impacted, having reliable performance, well protecting the vehicle body, being capable of better reducing the injury of the collision to passengers in the vehicle or pedestrians on the road, and having reliable performance.
Drawings
Fig. 1 is a schematic structural view of a front side member according to an embodiment of the present invention.
Fig. 2 is a transverse cross-sectional view of a front side member of one embodiment of the present invention.
Fig. 3 is a longitudinal sectional view of a front side member of one embodiment of the present invention.
Wherein: 1. front longitudinal beam shell, 2. honeycomb structure material with negative poisson ratio.
Detailed Description
For a better understanding of the present invention, reference is made to the following description taken in conjunction with the accompanying drawings and examples.
As shown in fig. 1-3, an automobile front longitudinal beam filled with a negative poisson's ratio cellular material comprises a front longitudinal beam shell 1, a cavity inside the front longitudinal beam shell is filled with a negative poisson's ratio cellular structure material 2, and the negative poisson's ratio cellular structure material is connected with the front longitudinal beam shell and is enclosed into a plurality of cells.
The front longitudinal beam shell is of a hollow cavity structure, the inner space of the front longitudinal beam shell can be in various shapes, the cross section of the front longitudinal beam shell can be circular or other polygons, and the cross section of the front longitudinal beam shell is a quadrangle.
The cross section of each single cell is concave hexagon and trapezoid, and the trapezoid cells are arranged close to the left side wall and the right side wall of the front longitudinal beam.
The concave angle of the hexagonal single cell is 150 degrees.
The negative Poisson ratio honeycomb structure material is perpendicular to the upper wall surface and the lower wall surface of the front longitudinal beam shell, so that the plane of the cross section of the negative Poisson ratio honeycomb structure material is parallel to the upper wall surface and the lower wall surface of the front longitudinal beam.
The inward concave direction of the single cell element of the negative Poisson ratio honeycomb structure material is vertical to the force transmission direction of the front longitudinal beam when the automobile is subjected to frontal collision.
The negative poisson ratio honeycomb structure material and the front longitudinal beam shell are made of the same aluminum profiles.
The negative poisson ratio honeycomb structure material and the front longitudinal beam shell are connected into an integral structure through welding or rivets.
The automobile front longitudinal beam with the structure is installed, and then the automobile front longitudinal beam and the frame form a whole. When an automobile is collided frontally, the front longitudinal beam is impacted, under the action of low-speed impact, all cells of the negative poisson ratio honeycomb structure are deformed integrally due to the existence of the negative poisson ratio honeycomb structure material filled inside, and the deformation of the front longitudinal beam is expressed as an integral uniform deformation mode; under the action of high-speed impact, the inertia effect of the front longitudinal beam is enhanced, the invention has stronger energy absorption capacity, and the negative poisson ratio honeycomb structure filled in the front longitudinal beam can better induce the front longitudinal beam body to generate crushing type fold deformation so as to protect the safety of passengers in the automobile.
The above is only a preferred embodiment of the present invention, and certainly, the scope of the present invention should not be limited thereby, and therefore, the present invention is not limited by the scope of the claims.
Claims (7)
1. The automobile front longitudinal beam filled with the negative Poisson ratio cellular material is characterized by comprising a front longitudinal beam shell, wherein a cavity in the front longitudinal beam shell is filled with the negative Poisson ratio cellular structure material, and the negative Poisson ratio cellular structure material is connected with the front longitudinal beam shell and is enclosed into a plurality of cells.
2. The negative poisson's ratio cellular material filled automobile front longitudinal beam of claim 1, wherein the cross-section of the single cell is concave hexagonal and trapezoidal.
3. The negative poisson's ratio cellular material filled automobile front rail of claim 2, wherein the concavity angle of the individual cell is 150 °.
4. The negative poisson's ratio honeycomb material filled automobile front longitudinal beam of claim 2, wherein the negative poisson's ratio honeycomb structural material is arranged perpendicular to the upper and lower wall surfaces of the front longitudinal beam shell.
5. The negative-poisson-ratio cellular material filled automobile front longitudinal beam according to claim 4, characterized in that the inward concave direction of the single cells of the negative-poisson-ratio cellular structure material is perpendicular to the force transmission direction of the front longitudinal beam when an automobile is subjected to a frontal collision.
6. The negative poisson's ratio honeycomb material-filled automobile front longitudinal beam of claim 1 or 5, characterized in that the negative poisson's ratio honeycomb structure material and the front longitudinal beam shell are made of the same aluminum profile.
7. The negative poisson's ratio honeycomb material-filled automobile front longitudinal beam of claim 6, wherein the negative poisson's ratio honeycomb structural material is connected with the front longitudinal beam shell through welding or rivets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911267101.4A CN111301525A (en) | 2019-12-11 | 2019-12-11 | Automobile front longitudinal beam filled with negative Poisson ratio honeycomb material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911267101.4A CN111301525A (en) | 2019-12-11 | 2019-12-11 | Automobile front longitudinal beam filled with negative Poisson ratio honeycomb material |
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| Publication Number | Publication Date |
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| CN111301525A true CN111301525A (en) | 2020-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911267101.4A Pending CN111301525A (en) | 2019-12-11 | 2019-12-11 | Automobile front longitudinal beam filled with negative Poisson ratio honeycomb material |
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| CN (1) | CN111301525A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112590938A (en) * | 2020-12-28 | 2021-04-02 | 湖南大学 | Automobile upper longitudinal beam made of layered filling material and using method and manufacturing method thereof |
| CN112623034A (en) * | 2020-12-28 | 2021-04-09 | 湖南大学 | Automobile front longitudinal beam with partitioned filling materials, automobile and manufacturing method of front longitudinal beam |
| CN112677920A (en) * | 2020-12-16 | 2021-04-20 | 南京理工大学 | Anti-explosion passenger leg protection device for military vehicle |
| CN113343371A (en) * | 2021-01-29 | 2021-09-03 | 北京理工大学重庆创新中心 | Design method of foam-filled negative Poisson's ratio composite structure |
| CN113525274A (en) * | 2021-07-08 | 2021-10-22 | 吉林大学 | Pre-collision device capable of adjusting positive and negative Poisson's ratio and control method |
| CN114798929A (en) * | 2022-05-12 | 2022-07-29 | 山东大学 | Metamaterial structure unit, three-dimensional structure, assembling die, device and method |
| CN114838072A (en) * | 2022-05-25 | 2022-08-02 | 武汉理工大学 | Negative Poisson ratio honeycomb cell element and multi-cell structure introducing square function curved edge |
| CN115246451A (en) * | 2021-04-26 | 2022-10-28 | 北京航空航天大学 | Car body of racing car, preparation method of car body and formula car |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112677920A (en) * | 2020-12-16 | 2021-04-20 | 南京理工大学 | Anti-explosion passenger leg protection device for military vehicle |
| CN112677920B (en) * | 2020-12-16 | 2022-01-11 | 南京理工大学 | Anti-explosion passenger leg protection device for military vehicle |
| CN112623034A (en) * | 2020-12-28 | 2021-04-09 | 湖南大学 | Automobile front longitudinal beam with partitioned filling materials, automobile and manufacturing method of front longitudinal beam |
| CN112590938A (en) * | 2020-12-28 | 2021-04-02 | 湖南大学 | Automobile upper longitudinal beam made of layered filling material and using method and manufacturing method thereof |
| CN113343371A (en) * | 2021-01-29 | 2021-09-03 | 北京理工大学重庆创新中心 | Design method of foam-filled negative Poisson's ratio composite structure |
| CN113343371B (en) * | 2021-01-29 | 2022-07-15 | 北京理工大学重庆创新中心 | Design method of foam-filled negative Poisson's ratio composite structure |
| CN115246451A (en) * | 2021-04-26 | 2022-10-28 | 北京航空航天大学 | Car body of racing car, preparation method of car body and formula car |
| CN115246451B (en) * | 2021-04-26 | 2023-07-28 | 北京航空航天大学 | Automobile body of racing automobile, preparation method of automobile body and formula racing automobile |
| CN113525274B (en) * | 2021-07-08 | 2022-07-12 | 吉林大学 | Pre-collision device capable of adjusting positive and negative Poisson's ratio and control method |
| CN113525274A (en) * | 2021-07-08 | 2021-10-22 | 吉林大学 | Pre-collision device capable of adjusting positive and negative Poisson's ratio and control method |
| CN114798929A (en) * | 2022-05-12 | 2022-07-29 | 山东大学 | Metamaterial structure unit, three-dimensional structure, assembling die, device and method |
| CN114798929B (en) * | 2022-05-12 | 2024-02-13 | 山东大学 | Metamaterial structure unit, three-dimensional structure, assembly mold, device and method |
| CN114838072A (en) * | 2022-05-25 | 2022-08-02 | 武汉理工大学 | Negative Poisson ratio honeycomb cell element and multi-cell structure introducing square function curved edge |
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Application publication date: 20200619 |