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Dynamic stress control of bi-material structure subjected to sawtooth shock pulse based on interface characteristics
Mechanics Research Communications ( IF 2.4 ) Pub Date : 2020-07-01 , DOI: 10.1016/j.mechrescom.2020.103558
Xiangyuan Zhang , Yao Shi , Guang Pan

Abstract 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.

中文翻译:

基于界面特性的锯齿冲击脉冲双材料结构动态应力控制

摘要 本文研究了锯齿波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个双材料模型和一个均质材料模型。这里提出添加碳化钨层可以显着降低铝合金的应力,而添加聚酰胺层在一定程度上增大了铝合金的应力。它还表明应力控制与几个关键因素有关——声阻抗、泊松比、材料的厚宽比、变形和波频率。
更新日期:2020-07-01
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