4048 応力分布下の構造材料における応力腐食割れのモンテカルロ・シミュレーション(G03-8 解析・計算技術,G03 材料力学)

概要

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A Monte Carlo simulation model for the process of stress corrosion cracking (SCC) in structural materials under nonuniform stress condition has been proposed. The possible number of crack initiations is set for a given space and the 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 uniform random numbers and normal random numbers, 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. Numerical examples exhibit the possibility for the model to describe the SCC behavior observed in real structures.
社団法人日本機械学会の論文
2006-09-15