STRAIN CONCENTRATION CALCULATION OF FATIGUE

On the basis of the authors' rule of sliding to transform elastic solu tion to plastic in a previous paper, a new method of calculating fatig ue is developed by using ordinary relaxation methods in conjunction to take care of the gradual enlarging of the plastic zone. The results o f the calculations agree with the experimental data by the fine grid m ethod. The calculation method developed here with the authors' crack p ropagation prediction method in another previous paper lead to an inte rpretation of fatigue mechanism.