Monte Carlo Simulation of Stress Corrosion Cracking on Smooth Surface of a Sensitized Stainless Steel Type 304 under Non-Uniform Stress Condition
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概要
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A Monte Carlo simulation model for the process of stress corrosion cracking (SCC) in structural materials under non-uniform stress condition has been proposed. The possible number of crack initiations is set for a given space and initiation times for all cracks are assigned by random numbers based on exponential distributions depending on stress level. Sites and lengths of the cracks are assigned by random numbers based on uniform distribution and normal distribution, respectively. Coalescence of cracks and subcritical crack growth are determined based on the fracture mechanics concept. Through the SCC process in the model, the influence of semi-elliptical surface cracks is taken into consideration. SCC simulations were carried out on an area around a weld line by taking account of residual stress distribution. Multiple parallel cracks were obtained along the weld line. Numerical examples exhibit the applicability of the model to describe the SCC behavior observed in real structures.
- 一般社団法人 日本機械学会の論文
著者
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TOHGO Keiichiro
Department of Mechanical Engineering, Shizuoka University
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Tohgo Keiichiro
Department Of Iron And Steel Engineering Nagoya University
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Shimamura Yoshinobu
Department Of Mechanical Engineering And Science Tokyo Institute Of Technology
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SUZUKI Hiromitsu
Department of Mechanical Engineering, Shizuoka University
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NAKAYAMA Guen
Research Laboratory, IHI Corporation
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HIRANO Takashi
Nuclear Power Division, IHI Corporation
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