首页> 外文期刊>The Journal of Strain Analysis for Engineering Design >Stress intensity factors for a semi-elliptical surface crack in a T-shaned geometry Part 2: approximate solutions at the deepest point for arbitrary crack-face loading
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Stress intensity factors for a semi-elliptical surface crack in a T-shaned geometry Part 2: approximate solutions at the deepest point for arbitrary crack-face loading

机译:T形几何中半椭圆形表面裂纹的应力强度因子,第2部分:任意裂纹面载荷的最深点处的近似解

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摘要

The Petroski-Achenbach displacement formulation is applied in conjunction with the weight function method in order to determine the mode I stress intensity factor at the deepest point of a semi- elliptical surface crack in a T-shaped geometry subjected to arbitrary crack-face loadings. The T-geometry is taken to be representative of the web and fiange of an I-section and was previously investigated for tensile and bending loading. Comparison between the model developed here and the finite element solutions for two different stress distributions reveals very good agreement for shallow cracks, although the differences between the results of the weight function formulation and the finite element results increase as the crack becomes deeper and more rounded. The normalized stress intensity factors, for up to fifth-degree polynomial crack-face loading, are given in tabular form.
机译:将Petroski-Achenbach位移公式与权函数方法结合使用,以确定在承受任意裂纹面载荷的T形几何形状中半椭圆形表面裂纹最深处的模式I应力强度因子。 T形代表了I型截面的腹板和边缘,并且先前已进行过拉伸和弯曲载荷研究。此处开发的模型与两种不同应力分布的有限元解决方案之间的比较表明,对于浅裂缝,尽管权函数公式化结果与有限元结果之间的差异随着裂缝的深化和圆化而增加,但一致性很好。以表格形式给出了至多五阶多项式裂纹面载荷的归一化应力强度因子。

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