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A cycle-jump acceleration method for the crystal plasticity simulation of high cycle fatigue of the metallic microstructure
International Journal of Fatigue ( IF 6 ) Pub Date : 2022-08-11 , DOI: 10.1016/j.ijfatigue.2022.107185
Jiahao Cheng , Xiaohua Hu , Michael Kirka

For metallic materials, high-cycle fatigue life is sensitive to underlying microstructure features including secondary phases, textures, grains morphology, etc. The traditional, data-based safe-life approaches for modeling fatigue don’t explicitly consider the microstructure and can’t guide study in microstructure modification for improved fatigue property. Crystal plasticity-based simulation provides increased model fidelity at the expense of immense computation time, making it inapplicable for high cycle fatigue. In this work, an acceleration method based on cycle-jump approach (Lesne and Savalle, 1989) was developed for microstructure-based high-cycle FE simulation using crystal plasticity constitutive-model. This method demonstrated high efficiency in benchmark tests of various conditions.



中文翻译:

金属组织高周疲劳晶体塑性模拟的循环跳跃加速方法

对于金属材料,高周疲劳寿命对潜在的微观结构特征很敏感,包括二次相、织构、晶粒形态等。传统的、基于数据的疲劳建模安全寿命方法没有明确考虑微观结构,也不能指导微观结构改性研究以改善疲劳性能。基于晶体塑性的模拟以巨大的计算时间为代价提供了更高的模型保真度,使其不适用于高周疲劳。在这项工作中,开发了一种基于循环跳跃方法(Lesne 和 Savalle,1989 年)的加速方法,用于使用晶体塑性本构模型进行基于微结构的高循环有限元模拟。该方法在各种条件的基准测试中表现出很高的效率。

更新日期:2022-08-16
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