円周切欠きまたはき裂を有する丸棒の引張りにおける応力集中:第ゼロ節点法に基づくFEM解析

概要

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The finite element method(FEM)is useful for the stress analysis and used widely in general. However, it is still not necessarily easy to obtain the highly accurate values of the stress concentration factors and the stress intensity factors by FEM. Recently, a method for calculating the highly accurate values of the stress concentration factors and the stress intensity factors in two-dimensional crack problems has been proposed by H. Nisitani, based on the usefulness of the stress values at a notch root and a crack tip calculated by FEM. This method is called the zeroth node method. In this study, an extension of the zeroth node method to the round bar with a circumferential notch or a crack was made. The extended method was applied to the tensile problems of a round bar with a single circumferential notch, a single circumferential crack, two circumferential cracks or an infinite row of circumferental cracks. As the results, it was confirmed that the extended zeroth node method has the sufficient accuracy in these problems.
一般社団法人日本機械学会の論文
2000-12-25