Abstract: | A general expression is established for the overall participation to the damage in case of a non-linear material with cracks, fatigue loaded; it allows fatigue strength calculation, with respect to the critical state (fatigue breaking) or to the allowable state. Through particularisation there were obtained the well-known relations for fatigue strength of linear-elastic materials (Gough and Pollard, Buzdugan, Soderberg, Goodman, Gerber, Cioclov. Crawford and Benham), Miner's cumulative damage rule. Morozov's relation for a cracked material loaded in tension. Generally speaking, the theoretical results may be used for a better evaluation of the experimental results, as well as for a better understanding of the superposition problems with application in the field of fatigue. |
