進展抵抗の不規則性を考慮した疲労き裂進展過程の確率モデル

概要

論文の詳細を見る
A stochastic fatigue crack growth model has been proposed in consideration of spatial random propagation resistance. The Fokker-planck equation has first been formed and solved analytically for a locally stationary random process. Then, by use of the solution, a stochastic growth model has been constructed which is deemed to reflect the engineering reality of random propagation resistance due to material inhomogeneity. Based upon the mode., the theoretical fatigue crack propagation life distribution has been derived explicitly, and its characteristics have been examined carefully. At the same time, it is exemplified that the derived life distribution shows a very good agreement with experimental data, and this suggests a wide applicability of the proposed model in the practical design.
社団法人日本機械学会の論文
1984-06-25