A method for energy absorption control of self-similar hierarchical cellular materials
A technology of cellular materials and control methods, which is applied in the field of energy absorption control of self-similar hierarchical cellular materials, can solve problems such as poor load consistency, and achieve the effect of improving energy absorption efficiency
Active Publication Date: 2018-12-07
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology
The compressive stress-strain curve of type I energy-absorbing structure is relatively flat, with good load consistency, and the energy absorbed by the structure changes almost linearly with the increase of compressive deformation; while the compressive stress-strain curve of type II energy-absorbing structure experiences Rapid drop after an initial stress peak, poor load consistency
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[0017] Below in conjunction with specific embodiment, further set forth the invention. It should be noted that: the following examples are only used to illustrate the present invention rather than limit the technical solutions described in the present invention. All technical solutions and their improvements that do not deviate from the spirit and scope of the present invention shall be included in the scope of the claims of the present invention.
[0018] The schematic diagram of the self-similar hierarchical multicellular energy-absorbing structure calculation model is attached figure 1 shown, where L 1 and L 2 Respectively represent the original structure size of the cellular material, V represents the impact velocity of the rigid plate, 1 represents the impact on the rigid plate, and 2 represents the fixed rigid plate.
[0019] The method of the self-similar hierarchical multicellular energy-absorbing structure of the present invention is to introduce a new self-similar...
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The invention relates to an energy absorption control method for a self-similarity layering cellular material. The method specifically comprises the steps that a novel self-similarity cellular microstructure in a smaller shape is used for replacing all cell wall connecting points of an original traditional cellular materials, and thus a design method for the self-similarity layering cellular material is proposed; a layering structure impact factor for reflecting the dynamic sensitivity of the self-similarity layering cellular material is introduced; a speed correlation factor for reflecting the correlation between the impact speed and energy absorption of the self-similarity layering cellular material is introduced; the dynamic carrying capability and the energy absorption efficiency of the self-similarity layering cellular material are controlled by adjusting the order of the layering structure, the layering structure impact factor and the relative density. The energy absorption control method is used for controlling the energy absorption capability of the material, high specific strength, specific stiffness and dynamic carrying capability are achieved, and the energy absorption efficiency of the material is improved.
Description
Technical field: [0001] The invention belongs to the technical field of energy absorption control of materials and structures, and in particular relates to a method for energy absorption control of self-similar hierarchical multicellular materials. Background technique: [0002] In recent years, with the rapid development of various vehicles such as automobiles, high-speed trains, ships and ultra-high-speed aircraft, and the increasingly prominent environmental pollution problems, the lightweight design of materials and structures has attracted the attention of many countries and governments. In this context, ultra-light cellular materials / structures have been widely used in many fields of engineering energy absorption due to their excellent specific stiffness, specific strength and excellent dynamic response characteristics. However, in actual engineering, the protected components are often used under the condition that the overall mass (or volume) is limited to a certain e...
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IPC IPC(8): G06F17/50
CPCG06F30/13G06F30/367G06F2111/04
Inventor张新春安利强祝晓燕李娜韩会龙
OwnerNORTH CHINA ELECTRIC POWER UNIV (BAODING)