Evaluation of Hydrogen Concentration in High Strength Steels under Stress Loading

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  • 高張力鋼板における応力負荷時の水素濃度分布評価

Abstract

<p>In order to evaluate hydrogen concentration under mechanical loading, a stress-hydrogen diffusion or distribution coupling computing method was developed based on Oriani's theory. The method was implemented to commercial finite element (FE) analysis software, Abaqus, with its user subroutine UMAT and UMATHT. This method was applied to analyze concentration of hydrogen near a blunting crack tip. It is shown that the results of hydrogen distribution were nearly identical compared to the Krom's study, and it is also shown that hydrogen concentration was higher supposing high strength steels.</p>

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