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首页> 外文期刊>Journal of Computational Physics >Improved CE/SE scheme with particle level set method for numerical simulation of spall fracture due to high-velocity impact
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Improved CE/SE scheme with particle level set method for numerical simulation of spall fracture due to high-velocity impact

机译:改进的CE / SE方案,采用粒子水平集方法,对高速撞击引起的剥落破坏进行数值模拟

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摘要

In the present paper, an Eulerian scheme combined with the hybrid particle level set method for numerical simulation of spall fracture due to high-velocity impact is proposed. An axisymmetric framework is established, based on an improved CE/SE scheme, to solve the high-velocity impact problems with large deformations, high strain rates and spall fractures. The hybrid particle level set method is adopted for tracking material interfaces and describing the formation and propagation of a crack. A novel representation of crack by level set is proposed. Numerical simulations are carried out and compared to the corresponding experimental results. The numerical results are in good agreement with the experimental data. The edge effects are reproduced and the decrease of scab thickness with increase in impact velocity is observed owing to the numerical analysis. It is proved that our computational technique is feasible and reliable for analyzing the spall fracture.
机译:提出了一种结合混合粒子水平集方法的欧拉方案,对高速冲击引起的剥落破坏进行了数值模拟。基于改进的CE / SE方案,建立了轴对称框架,以解决变形大,应变率高和剥落破裂的高速冲击问题。采用混合粒子水平集方法来跟踪材料界面并描述裂纹的形成和扩展。提出了一种新的水平集裂纹表示方法。进行了数值模拟,并与相应的实验结果进行了比较。数值结果与实验数据吻合良好。由于数值分析,再现了边缘效应,并且观察到ab的厚度随着冲击速度的增加而减小。证明了我们的计算技术对分析剥落裂缝是可行和可靠的。

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