Dynamic stress control of bi-material structure subjected to sawtooth shock pulse based on interface characteristics
Dynamic stress control of bi-material structure subjected to sawtooth shock pulse based on interface characteristics
复制标题
基于界面特性的锯齿冲击脉冲双材料结构动态应力控制
DOI：
10.1016/j.mechrescom.2020.103558
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发表时间：
2020-07
影响因子：
2.4
通讯作者：
Guang Pan
中科院分区：
文献类型：
--
作者：
Xiangyuan Zhang;Yao Shi;Guang Pan
本文重点研究锯齿冲击脉冲作用下双材料结构的动态应力控制。基于解析方法，研究了可能影响动应力的因素。然后，通过有限元方法研究了两种双材料模型和一种均匀材料模型。提出了添加碳化钨层可以显著降低铝合金的应力，而添加聚酰胺层则在一定程度上增大了铝合金的应力。应力控制与声阻抗、泊松比、材料的厚宽比、变形和波的频率等因素有关。
This paper focuses on dynamic stress control of bi-material structure under the action of sawtooth shock pulse. The factors that are likely to influence the dynamic stress are studied based on the analytical method. Then two bi-material models and a homogenous material model are investigated through the finite element method. The supplement of tungsten carbide layer could reduce the stress of aluminum alloy significantly are proposed here, while the supplement of polyamides layer, to some extent, enlarge the stress of aluminum alloy. It also suggests that the stress control is related to several key factors - the acoustic impedance, the Poisson's ratio, the ratio of thickness to width of material, the deformation and the wave frequency.
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