内凹-星型三维负泊松比结构设计及冲击吸能特性

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Abstract Negative Poisson’s ratio structures have considerable application prospects in the field of energy absorption due to their abnormal deformation mechanism. This paper designs and characterizes a novel negative Poisson’s ratio structure with adjustable parameters. The static/dynamic mechanical properties and energy absorption characteristics are systematically studied using a combination of theoretical and numerical simulation research methods. The research results show that the new structure has excellent mechanical properties and adjustable parameters. Under static compression conditions, the new structure has higher stiffness and better energy absorption performance, with a specific energy absorption value 2.64 times that of the concave honeycomb structure and 3.89 times that of the star-shaped honeycomb structure. Under dynamic impact conditions, the energy absorption performance of the concave-star structure is better than that of two traditional honeycomb structures (concave and star-shaped) at low velocity, and its energy absorption advantage degrades at medium and high velocities, which is equivalent to the concave honeycomb structure but much higher than the star-shaped honeycomb structure.

Key words： negative Poisson's ratio structure energy absorption mechanical properties finite element

Received: 17 April 2023 Published: 28 March 2024

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	Articles by authors
	WANG Weijing1
	2
	ZHANG Weiming2
	GUO Mengfu3
	YANG Jinshui1
	MA Li2

Cite this article:

WANG Weijing1,2,ZHANG Weiming2, et al. Design and impact energy absorption characteristics of concave-star three dimensional negative Poisson’s ratio structures[J]. JOURNAL OF VIBRATION AND SHOCK, 2024, 43(6): 75-83.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2024/V43/I6/75

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