摘要
本文提供了调质45钢在不同应力集中系数下的P—S—N曲线及疲劳缺口系数的试验值,并为有效应力集中系数计算公式K_б=K^t/[0.88+A(Q/rd)~b[1]进一步简化为K_δ=Kr/(0.88+AQ^b)[2]提供了重要的试验数据。
The paper provides the experiment value of fatigue notch Coefficient and Seven P--S--N curves of diffierent effective stress concentrative Coefficient for 45 (mix) steel. By means of the experi mental date, The formula of effective stress Concentrative coeffi- cient K_6=K_t/[0. 88+A(Q/r^d)~b] is further simplified into K_σ=Kt/ [0. 88+AQ^b].
关键词
调质钢
有效应力
应力集中
系数
metal Fatigue
Effective Stress
stress Concentration
