Dynamic Crushing Behavior of Graded Hollow Cylindrical Shell under Axial Impact Loading
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摘要: 通过建立应力波在圆管中传播的单波模型,引入圆管屈曲过程中壁厚变化修正参数,分析了壁厚沿轴向变化的梯度圆管在受到冲击载荷作用时的轴向屈曲动力响应,并与均匀壁厚圆管进行对比。修正后的单波模型理论结果与数值模拟结果吻合较好。在轴向冲击载荷作用下,与均匀壁厚圆管相比,梯度薄壁圆管具有更好的缓冲作用。Abstract: In this study, the single shock mode—shock wave propagates along the hollow cylindrical shell—was established and, by introducing the modified pipe wall parameters, the axial dynamic buckling response of the graded hollow cylindrical shell was predicted and compared with that of the hollow cylindrical shell with a uniform wall thickness.The result of the modified single shock mode is in good agreement with that from the numerical simulation.Under axial impact loading, the impact resistance of the graded hollow cylindrical shell is better than that of the hollow cylindrical shell with the uniform wall thickness.
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Key words:
- hollow cylindrical shell /
- buckling /
- impact loading /
- stress wave
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