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<p>The physical applications of negative Poisson’s ratio structures of insufficient bearing capacity were limited. The topologies of high stiffness negative Poisson’s ratio (T-SNPR) were designed, and the bearing and energy absorption performance of their three-dimensional structures (S-SNPR) were analyzed using the finite element method. Furthermore, the experimental results of the second SNPR structure (S-SNPR-2) specimen produced by wire electro discharge machining (WEDM) were identical to the numerical results, and the error values of force and energy absorption were 8.9% and 14.9%, respectively. The SNPR-2 obtained the higher EA value of 83&#xa0;kJ, SEA value of 2.3&#xa0;kJ&#xa0;kg<sup>−1</sup>, and bearing force value of 1050&#xa0;kN, as well as the more extensive compress stroke strain value of 0.18 than S-SNPR-1. Under compression and high-velocity impact, the S-SNPR-2 structure with a relative density value of 0.57 obtained better bearing, energy absorption, and impact resistance capacities. Under low- and medium-velocity impact, the S-SNPR-2 structure with a relative density value of 0.52 obtained better bearing and impact resistance characteristics, and the S-SNPR-2 structure with a relative density value of 0.57 had better energy absorption performance. The S-SNPR-2 proposed in this paper has a good application prospect as an energy-absorbing component in coal mining supporting equipment.</p> Graphical abstract <p></p>

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A comprehensive research on SNPR structures with energy absorption and bearing capacities: topology optimization, numerical simulation and experimental verification

  • 期刊论文

  • 发表日期：

    2025年2月10日

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  • Kaixing Wang,
  • Chengling Yang,
  • Yishan Pan,
  • Lianpeng Dai

摘要

The physical applications of negative Poisson’s ratio structures of insufficient bearing capacity were limited. The topologies of high stiffness negative Poisson’s ratio (T-SNPR) were designed, and the bearing and energy absorption performance of their three-dimensional structures (S-SNPR) were analyzed using the finite element method. Furthermore, the experimental results of the second SNPR structure (S-SNPR-2) specimen produced by wire electro discharge machining (WEDM) were identical to the numerical results, and the error values of force and energy absorption were 8.9% and 14.9%, respectively. The SNPR-2 obtained the higher EA value of 83 kJ, SEA value of 2.3 kJ kg−1, and bearing force value of 1050 kN, as well as the more extensive compress stroke strain value of 0.18 than S-SNPR-1. Under compression and high-velocity impact, the S-SNPR-2 structure with a relative density value of 0.57 obtained better bearing, energy absorption, and impact resistance capacities. Under low- and medium-velocity impact, the S-SNPR-2 structure with a relative density value of 0.52 obtained better bearing and impact resistance characteristics, and the S-SNPR-2 structure with a relative density value of 0.57 had better energy absorption performance. The S-SNPR-2 proposed in this paper has a good application prospect as an energy-absorbing component in coal mining supporting equipment.

Graphical abstract