回転曲げ疲労におけるS45C鋼の表面き裂進展速度の破壊力学的検討

概要

論文の詳細を見る
Surface crack growth under rotary bending, where a stress gradient is produced in the cross section of the specimen, was analyzed in terms of the stress intensity factor range, ΔK, and the cyclic J-integral range, ΔJ. These data were compared with those of a large through crack in a center-cracked specimen and a short surface crack in a smooth specimen under a push-pull load. The surface crack growth rate plotted against ΔJ in the rotary bending test was nearly coincident with those for the short surface crack and the large center crack under the push-pull load. The stress intensity factor, which was analyzed for a crack in a semi-infinite body by Raju-Newman, could be applied to the analysis of the fatigue crack growth of the laboratory-type specimen in a practical sense.
一般社団法人日本機械学会の論文
1988-07-25