Fatigue crack growth modelling for S355 structural steel considering plasticity-induced crack-closure by means of UniGrow model

The UniGrow model is an analytical procedure to assess the fatigue crack growth based on elastic–plastic tip stresses and strains. assumption that (FCG) can be considered as a process of successive re-initiations resulting from material damage in zone. main parameters this are radius elementary block size. Experimental FCG data obtained for S355 carbon steel showed assuming size with same value collapse using non-coherent experimental evidence. In sense, new approach proposed by establish clear distinction between radius, ?, was defined correlation numerical values residual compressive stress field ahead while size, ??, expression which relies effective intensity factor range cyclic yield strength. This research intends valuable contribution implementation material.