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Research of structure with negative Poisson’s ratiounder three-point bending(PDF)


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Research of structure with negative Poisson’s ratiounder three-point bending
Gao Qiang1Wang Liangmo1Zhong Hong1Qian Yahui1Wang Chenzhi2
1.School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China; 2.InDepth Engineering Solutions,Limited Liability Corporation,Troy 48084,US
concave hexagonal structure negative Poisson’s ratio three-point bending cellular structure
In order to study the crashworthiness of the concave hexagonal structure with negative Poisson’s ratio under three-point bending,the effect of cellular structure parameters including the thickness,the width,the height and the inner concave angle on the performance is focused using the explicit dynamic finite element ANSYS/LS-DYNA. The specific energy absorption(SEA)and the peak crushing force(PCF)are adopted as crashworthiness indices. The results show that the SEA and the PCF increase at the same time with the increase of the thickness of the cell and decrease of the cell height; With the increase of the cell width,the SEA increases first and then decreases,while the PCF presents the opposite trend. The SEA decreases with the increase of the inner concave angle. When the inner concave angle is small or about 45°,the PCF is higher. It is inportant to choose appropriate cellular parameters for improving bending performance of the structure.


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Last Update: 2019-04-26