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EFFECTS OF STRAIN RATE ON THE STRESS PROPAGATIONS IN BONDED SHRINK FITTED JOINTS UNDER IMPACT PUSH-OFF LOADINGS

机译:应变率对冲击推式载荷下粘结收缩嵌入接头应力传播的影响

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摘要

The effects of the strain rate sensitivity on the stress propagations of bonded shrink fitted joint, in which a ring is fitted using an adhesive layer at the middle part of a shaft, subjected to impact push-off loadings are examined. The plastic flow deformation behaviors of structural adhesive under some strain rates are examined experimentally. In addition, the stress wave propagations in the joint are analyzed using finite element method (FEM). The experimental results show that the yield stress of the adhesive increases as the strain rate increases nonlinearly. It is observed that the maximum equivalent von Mises stress occurs in the adhesive layer at the upper interfaces, which causes the rupture of the joint based on the numerical calculations. Furthermore, the strain responses obtained from numerical and experimental methods are compared with each other. A fairly good agreement is obtained between FEM calculations and experiments. In addition, the joint strength is predicted by impact energy using experimental results, which is about 20.85 J in the present study.
机译:上粘结收缩的应力的传播的应变率敏感性的影响嵌合接头,其中一个环是用在轴的中间部分的粘合层,进行冲击按压断开负载嵌合被检查。下一些应变率结构粘合剂的塑性流动变形行为进行了实验研究。另外,在接头中的应力波的传播是采用有限元法(FEM)进行分析。实验结果表明,粘合剂随着应变速率的屈服应力非线性增大。据观察,最大等效von Mises应力在在上部界面的粘接层,这会导致基于该数值计算的接头的断裂发生。此外,从数值模拟和实验方法获得的应变响应进行相互比较。为FEM计算和实验之间获得了相当不错的协议。另外,接合强度是通过使用实验结果的冲击能量,其是关于在本研究20.85Ĵ预测。

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