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Prediction of the crack growth propagation direction in non-proportional mixed-mode missions
International Journal of Fatigue ( IF 6 ) Pub Date : 2022-09-14 , DOI: 10.1016/j.ijfatigue.2022.107233
Daniele Amato, Lukas Mayrhofer, Christian Robl, Guido Dhondt, Roberto Citarella

The prediction of the crack growth propagation direction due to Non-Proportional Mixed-Mode missions is still an open debate in industrial applications. This study proposes two algorithms, both based on the dominant step criterion, to evaluate the cyclic crack propagation due to missions with varying mixed-mode loading conditions. They are implemented in the commercial software FRANC3D (coupled with ABAQUS) and the MTU Aero Engines AG in house tool, CRACKTRACER3D (coupled with CalculiX). The results of the numerical simulations are validated with the experimental data from tension-torsion tests with and without phase shift. The comparisons show that both software predictions are in good agreement with the experimental results and they can be confirmed as valid tools to simulate crack propagation due to a mission.



中文翻译:

非比例混合模式任务中裂纹扩展扩展方向的预测

由于非比例混合模式任务导致的裂纹扩展扩展方向的预测仍然是工业应用中的公开辩论。本研究提出了两种基于主导步长准则的算法来评估循环裂纹扩展由于具有不同混合模式加载条件的任务。它们在商业软件 FRANC3D(与 ABAQUS 结合)和 MTU Aero Engines AG 内部工具 CRACKTRACER3D(与 Ca​​lculiX 结合)中实现。数值模拟的结果通过有和没有相移的拉伸扭转试验的实验数据得到验证。比较表明,这两种软件的预测与实验结果非常吻合,可以确认它们是模拟任务引起的裂纹扩展的有效工具。

更新日期:2022-09-19
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