焼入れ残留応力を考慮した損傷力学モデリングとクランクシャフトへの適用

抄録

To cope with the higher output of the engine, crankshaft is made to satisfy the required performance by heat treatment. During heat treatment, residual stress due to the phase transformation occurs. Therefore, not only the stress amplitude at the time of operation, it is necessary fatigue life prediction of complex stress state in consideration of the residual stress. In the past, a material modeling of non-heat treated carbon steel was reported sing the two scale model of the continuum damage mechanics, and subjected to life prediction in consideration of the average stress. In this study, the analysis method is applied to quenched crankshaft, to verify the usefulness of this study.