Abstract:In order to accurately study the numerical simulation of negative stiffness honeycombs with viscoelastic materials, a numerical simulation method that based on the viscoelastic generalized Maxwell model was proposed to simulate the compression properties of negative stiffness honeycombs. A dynamic mechanical analysis (DMA) testing was carried out for nylon 12, and the generalized Maxwell model was used to fit the measured data, thus, the dynamic modulus that reflected nylon 12 dynamic viscoelastic dimensionless modulus gi and relaxation time τi were obtained. The finite element model of the negative stiffness honeycombs was established in Abaqus, and the dynamic viscoelastic parameters were applied to study the compression performance of the structure. At the same time, the compression experiment was carried out to verify the accuracy of the numerical simulation results. Finally, the influence of geometric parameters on compression the performance of structures was numerically simulated. The results show that the simulation analysis method based on the generalized viscoelastic Maxwell model can accurately simulate the compression performance of negative stiffness honeycombs, which provided help for the scientific prediction of the mechanical properties of negative stiffness honeycombs.
原新嫣,王树青,张媛,方辉,宋宪仓,许益华. 负刚度蜂窝结构压缩性能分析[J]. 振动与冲击, 2021, 40(8): 255-262.
YUAN Xinyan, WANG Shuqing, ZHANG Yuan, FANG Hui, SONG Xiancang, XU Yihua. A study on compression performance of negative stiffness honeycombs. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(8): 255-262.
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