Elasto-Plastic Fatigue Crack Growth: Mathematical Models and Experimental Evidence

Abstract

This paper d~~bes some analytical models developed for the evaluation of the cyclic J•integral, ~J. The J-integral is usually obtained through involved graphical procedures with experimental load-load point displacement plots. Numerical and other procedures are even more time consuming. For typical specimens, such as C(T), TPB and DCB (double cantilever beam) the graphical procedures are much simpl~r.An easily applicable analytical formula for the cyclic J-integral, by means of which the integral could be calculated and which would be comprehensive enough to be applicable for the conditions of fatigue and creep would be particularly helpful~