フェライト粒径の異なるS20C平滑材における微小き裂伝ぱ速度の統計的性質

概要

論文の詳細を見る
In order to investigate the scatter characteristics of growth rate for small cracks, rotating bending fatigue tests of smooth specimens were carried out using 0.21% carbon steel with different ferrite grain sizes. Fifteen to eighteen specimens were fatigued at each stress range, and the growth rate of a crack which led to the fracture was measured for all the specimens. The growth data were analyzed statistically. The results show that the growth rate for each crack length can be expressed by a three-or two-parameter Weibull distribution. The CV, coefficient of variance, for crack growth rate distribution was calculated, and using the CV the relations between the scatter in growth rate and the ferrite grain size and stress level were investigated.
社団法人日本機械学会の論文
1994-01-25