arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1906.04740math.NAcs.NA
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各向同性和各向异性表面能动态脆性断裂的相场材料点法

Phase-field material point method for dynamic brittle fracture with isotropic and anisotropic surface energy

Emmanouil Kakouris, Savvas P. Triantafyllou

摘要:

在考虑各向异性表面能的最一般情况下,提出了一种新的相场材料点法,用于弹性介质动态断裂的鲁棒模拟。各向异性是明确地通过一个适当定义的裂纹密度泛函。冲击驱动断裂的特殊情况下,处理采用离散场方法内的材料点方法设置。在此,运动方程和相场控制方程的求解独立于每个离散场使用预测校正算法。界面处的接触通过摩擦接触条件来解决。所提出的方法进行了验证,使用分析预测。通过一组基准问题评估表面能各向异性和加载条件对所得裂纹路径的影响。与标准的相场有限元法和实验观察进行了比较。

英文摘要:

A novel phase field material point method is introduced for robust simulation of dynamic fracture in elastic media considering the most general case of anisotropic surface energy. Anisotropy is explicitly introduced through a properly defined crack density functional. The particular case of impact driven fracture is treated by employing a discrete field approach within the material point method setting. In this, the equations of motion and phase field governing equations are solved independently for each discrete field using a predictor-corrector algorithm. Contact at the interface is resolved through frictional contact conditions. The proposed method is verified using analytical predictions. The influence of surface energy anisotropy and loading conditions on the resulting crack paths is assessed through a set of benchmark problems. Comparisons are made with the standard Phase Field Finite Element Method and experimental observations.

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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