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Strip-yield and finite element analysis of part-through surface flaws

机译:部分贯通表面缺陷的带材屈服和有限元分析

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摘要

A slice synthesis methodology is developed and used to construct a weight function based strip-yield model for a semi-elliptical part-through surface flaw in an elastic-perfectly plastic body under monotonic loading. The model enables rapid approximate computation of the crack surface displacements and the crack front plastic zone size in the crack plane. A detailed mathematical description of the model is presented. Crack surface displacements from the model are shown to compare well with results from detailed three-dimensional elastic-plastic finite element analyses. From the finite element analyses, the crack plane plastic zone is shown to give an unrealistic perspective of overall crack front plasticity.
机译:开发了一种切片合成方法,并将其用于构建基于重量函数的条形屈服模型,用于单调加载下弹性完美的塑料体中的半椭圆形部分贯通表面缺陷。该模型能够快速近似地计算裂缝表面位移和裂缝平面中的裂缝前沿塑性区大小。给出了模型的详细数学描述。结果表明,该模型的裂纹表面位移可以与详细的三维弹塑性有限元分析结果进行比较。从有限元分析来看,裂纹平面塑性区显示出整体裂纹前沿塑性的不切实际的观点。

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