The Proceedings of the Materials and Mechanics Conference
Online ISSN : 2424-2845
2019
Session ID : OS0104
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Application of nonlinear crack mechanics to V-shaped notch strength evaluation
*Kazuhiro ODAHarutaka INOUEMasafumi YAMAMOTONoriko TSUTSUMI
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Abstract

In this study, the non-linear crack mechanics proposed by Prof. Nisitani is applied to the strength evaluation of V-shaped notch plate under large scale yielding condition. The tensile test of carbon steel JIS S45C specimen is carried out to obtain failure stress for various notch depths and angles. The value of plastic strain at the notch-tip-node in the specimen is computed by elastic-plastic FEM analysis under the same mesh pattern. As a result, it is found that the failure strength of the sharp notched specimens for various notch depths and angles can be estimated by using the plastic strain at the notch tip calculated by FEM. In addition, the plastic singularity index of V-shaped notch can be obtained by a simple analysis using the finite element method. The Mode I and Mode II indices of plastic stress singularity can be easily obtained under tension and shear loading conditions.

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© 2019 The Japan Society of Mechanical Engineers
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