This paper introduces a new approach to calculate stress intensity factors based on a combination of Displacement Extrapolation Method and Peridynamic Theory. After obtaining the displacement field from Peridynamic Theory, by appropriately selecting nodes at the crack tip region and their displacements yield stress intensity factors at the crack tips. To demonstrate the capability of the proposed approach, three different benchmark problems are considered including plate with a central crack, plate with an edge crack and plate with a slanted crack. Results evaluated from the current approach are compared against analytical and finite element analysis results, and good agreement is obtained between three different approaches. This shows that coupled Displacement Extrapolation Method and Peridynamic Theory approach can be an alternative method to calculate stress intensity factors.

中文翻译：

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在近场动力学框架中使用位移外推法计算应力强度因子

本文介绍了一种基于位移外推法和近场动力学理论相结合的应力强度因子计算新方法。在从白动力学理论获取位移场后，通过适当地选择裂缝尖端区域的节点及其位移在裂缝提示处产生应力强度因子。为了证明所提出方法的能力，考虑了三个不同的基准问题，包括具有中心裂纹的板、具有边缘裂纹的板和具有倾斜裂纹的板。将当前方法评估的结果与解析和有限元分析结果进行比较，三种不同方法之间获得了良好的一致性。