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arXiv 0804.4600cond-mat.mtrl-sci
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用平面裂纹扩展相场模型研究分支不稳定性

Study of the branching instability using a phase field model of inplane crack propagation

H. Henry

摘要:

本研究利用相场模型研究二维平面内载荷作用下裂纹扩展的动态分叉失稳。模拟结果与理论预测和实验结果吻合良好。即,开始不稳定的临界速度约为$0.48 c_s$。他们还表明,需要一个完整的3D方法来充分理解分支不稳定性。有限界面效应被发现是可以忽略的大系统尺寸的限制,即使他们比一个简单的一维计算预期的更强。

英文摘要:

In this study, the phase field model of crack propagation is used to study the dynamic branching instability in the case of inplane loading in two dimensions. Simulation results are in good agreement with theoretical predictions and experimental findings. Namely, the critical speed at which the instability starts is about $0.48 c_s$. They also show that a full 3D approach is needed to fully understand the branching instability. The finite interface effects are found to be neglectable in the large system size limit even though they are stronger than the one expected from a simple one dimensional calculation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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