FATIGUE-CRACK GROWTH-BEHAVIOR OF SM45C STEEL UNDER MIXED-MODE I AND II LOADING

The practical applications of studies related to constant amplitude mo de I loading are somewhat limited in situations where more than one mo de exists. So, criteria, rules and laws for these situations have to b e validated with experiments. This paper extends previous results by t he authors for mixed-mode I and II fatigue loading. An effective stres s intensity factor range which considers crack closure and crack surfa ce interference is described for the analysis of a crack under mixed-m ode I and II fatigue loadings, and this factor is assessed from experi mental results.