Composite energy-absorbing layer, sandwich structure and preparation method
A sandwich structure and energy-absorbing cavity technology, which is applied in the field of energy-absorbing materials, can solve problems such as poor energy-absorbing effect and reduced compressive strength of thin-walled structures
Pending Publication Date: 2021-07-30
GUANGZHOU UNIVERSITY
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is: the existing thin-walled structure adopts a uniform structure, and after a certain section is damaged by collision, the overall compressive strength of the thin-walled structure drops rapidly, resulting in poor energy absorption effect
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[0031] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0032] In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "top", "bottom" etc. are based on those shown in the accompanying drawings. Orientation or positional relationship is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. It should be understood that the terms "first", "secon...
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The invention relates to the technical field of energy-absorbing materials, and discloses a composite energy-absorbing layer, a sandwich structure and a preparation method, the composite energy-absorbing layer comprises a plurality of energy-absorbing core layers which are sequentially arranged from top to bottom; each energy-absorbing core layer comprises a plurality of energy-absorbing cavities which are arranged at intervals, the plurality of energy-absorbing cavities located in the middle of each energy-absorbing core layer are arranged in a sealed mode, and the plurality of energy-absorbing cavities located on the edge of each energy-absorbing core layer are provided with openings; and the included angle of the upper portion of each energy-absorbing cavity is a first dihedral angle, and the first dihedral angles of the multiple layers ofenergy-absorbing core layers are sequentially reduced from top to bottom. Due to the fact that the first dihedral angles of the energy-absorbing core layers are sequentially reduced from top to bottom, the composite energy-absorbing layer has gradient damage when bearing large collision force, and more energy can be absorbed when the composite energy-absorbing layer is damaged; and the composite energy-absorbing layer is formed at a time through 3D printing, the structure is compact, and the energy-absorbing effect is guaranteed.
Description
technical field [0001] The invention relates to the technical field of energy-absorbing materials, in particular to a composite energy-absorbing layer, a sandwich structure and a preparation method. Background technique [0002] At present, the number of motor vehicles is increasing, and the probability of vehicle collision accidents continues to increase, and people pay more and more attention to the safety protection performance of vehicles. The buffer energy-absorbing structure located at the front end of the vehicle has a great influence on the test results of vehicle safety performance. Therefore, energy-absorbing materials with excellent impact resistance have always been the focus of research. [0003] The thin-walled structure can not only absorb energy efficiently, but also has a lighter weight, which can improve the vehicle's fuel economy while improving the vehicle's collision performance. Therefore, the thin-walled structure is widely used in the collision system...
Claims
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IPC IPC(8): B32B15/20B32B15/088B32B27/34B32B3/12B32B7/12B32B37/12B29C64/386B33Y50/00B60R19/18
CPCB32B15/20B32B15/088B32B27/34B32B3/12B32B7/12B32B37/12B29C64/386B33Y50/00B60R19/18B32B2307/558B32B2605/08B60R2019/1846
Inventor 项新梅崔文天
Owner GUANGZHOU UNIVERSITY