Analysis of Fatigue Crack Propagation With Multiple Mechanisms

ABSTRACT In this paper, an attempt is made to analyze and correlate load ratio effects on fatigue crack growth (FCG) when multiple mechanisms are involved. To identify different mechanisms, a plot of normalized stress intensity factor (SIF) range as a function of the load ratio (R) at a given constant fatigue crack growth (FCG) rate is used. The proposed analysis is validated and compared with FCG data reported in the literature.