Ls动力学是分析冲击载荷下应力波传播的有效工具

Journal of Engineering and Applied Sciences , University of Engineering and Technology, Peshawar Pub Date : 2008-06-30 DOI:10.25211/JEAS.V27I1.170

Ahmad Junaid, M. Irfan, H. Ullah

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引用次数: 2

摘要

在ANSYS - LS DYNA软件中成功建立了霍普金森断裂杆的模型。结果表明，该方法与应力波理论在分析冲击试验中的应用具有较好的一致性。Ramberg-Osgood本构模型成功地模拟了高应变率变形。通过与实验对比，确定了工业纯铝和440 WGA钢的Ramberg-Osgood法所用的材料常数。结果显示网格独立性。本研究验证了LS DYNA作为应力波理论分析动态实验的工具。

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LS DYNA AS A VALID TOOL FOR ANALYZING STRESS WAVE PROPAGATION UNDER IMPACT LOADING

Hopkinson Fracture bar was successfully modeled in ANSYS — LS DYNA. The results showed very good conformity with stress wave theory used for analyzing impact experiments. Ramberg-Osgood constitutive model was successfully employed to simulate high strain rate deformation. The materials constants used in Ramberg-Osgood for the commercial purity aluminum and 440 WGA steel were determined by comparison with experiments. The results showed mesh independence. The current study validates LS DYNA as a tool to analyze dynamic experiments using stress wave theory.

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Journal of Engineering and Applied Sciences , University of Engineering and Technology, Peshawar

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