Abstract Short cracks appearing under fatigue conditions are of major concern for safety-critical components. In this paper, a computational approach based on crystal plasticity and extended finite element method is developed to predict the slip-controlled short crack growth in a single crystal nickel-based superalloy. The onset of fracture is controlled by cumulative shear strain of individual slip system and the direction of crack growth follows the crystallographic slip plane. Simulations are carried out for [111] orientation at 24 °C and 650 °C, and the results confirm the capability of this approach in predicting the tortuous crack path and irregular propagation rate.

中文翻译：

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使用晶体塑性和 XFEM 模拟单晶镍基高温合金中的短裂纹扩展

摘要 疲劳条件下出现的短裂纹是安全关键部件的主要关注点。在本文中，开发了一种基于晶体塑性和扩展有限元方法的计算方法来预测单晶镍基高温合金中滑移控制的短裂纹扩展。断裂的开始由单个滑移系统的累积剪切应变控制，裂纹扩展方向遵循晶体滑移平面。在 24 °C 和 650 °C 下对 [111] 取向进行了模拟，结果证实了这种方法在预测曲折裂纹路径和不规则传播速率方面的能力。