Modeling approach for a unified crack growth model in short and long fatigue crack regimes

摘要: Abstract In this paper, the recently proposed UniGrow model modification is further improved and a modeling framework of developed to account for both short long crack growth behavior. The approach incorporates integration propagation into address in unified manner. A systematic study performed validate assess its prediction capabilities shortcomings predict behavior cracks. assessed by first comparing predicted fatigue results with data sets 7010-T7, 2024-T3, 2324-T3, 7050-T7 7075-T6 aluminum alloys at four different R ratios; are comparison predictions 2090-T8E41, LC9cs Ti-6Al-4V titanium two R-ratios. showed good correlation matched well nonlinearity material revealed that even though was agreement R-ratios, did not correlate these three materials accurately variability growth.