1011 FATIGUE LIFE PREDICTIONS FOR INDUCTION HARDENED SHAFTS

概要

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Compressive residual stresses introduced into shafts during induction hardening have been found to improve the fatigue life of notched shafts in torsion. However it is only recently that work by the authors and their colleagues has produced extensive data and a fatigue damage parameter that accurately describes the effect of residual stresses normal to the crack plane in torsional fatigue. This paper uses this parameter in predicting the fatigue lives of such shafts. Hardness and residual stress profiles were obtained for potential failure locations. Torsional shear stress distributions for these locations were calculated and shear stress amplitudes and residual stresses were combined at various radial distances from the center to obtain parameter values. Parameter values and parameter versus fatigue life curves for the appropriate hardness levels were used to predict failure locations and fatigue lives. Predicted fatigue lives agree well with the authors' experimental results.
一般社団法人日本機械学会の論文
2003-09-23