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A 2-D analytical model which is termed the PICC-RICC model combines the effects of plasticity-induced crack closure (PICC) and roughness-induced crack closure (RICC). The PICC-RICC model handles naturally the gradual transition from RICC to PICC dominated crack growth. In this study, the PICC-RICC model is combined with a crack nucleation model to predict the total fatigue life of a notched component. This modified PICC-RICC model will be used to examine several controversial aspects of an earlier, computationally simpler total-life model known as the IP model.
crack closure, notches, total fatigue life, fatigue life prediction models
Senior research engineer, Caterpillar Inc., Technical Center, Peoria, IL
Professor, University of Illinois at Urbana-Champaign, Urbana, IL