異周期の曲げ・ねじり組合せ応力を受ける切欠き材のS-N線図に基づく疲労寿命推定法(<特集>疲労特集)

概要

論文の詳細を見る
In order investigate the fatigue life of notched specimens under combined bending and torsion which were acting at different frequencies, a testing machine was deviced, and some experiments were carried out on three types of notched carbon steel specimens. In the same way as that proposed in the previous paper, a modified Findley equation including the correction factor of different freqoencies R^<1/t> was used as the criterion of fatigue life. (σ/(σ_N))^<a/ψN>+((R^<1/t>・τ)/(τ_N))^2=1 where σ_N, τ_N=fatigue strengths at N cycles ψ_N=τ_N/σ_N R=the frequency ratio of torsion to bending t=the gradient of the S-N diagram of torsion It was found that the method was applicable to the notched specimens also.
社団法人日本材料学会の論文
1987-10-15