SEDL / STP / STP1343-EB / STP15767S

A Comparison of Two Total Fatigue Life Prediction Methods

Chen, N
Senior research engineer, Caterpillar Inc., Technical Center, Peoria, IL

Lawrence, FV
Professor, University of Illinois at Urbana-Champaign, Urbana, IL

Pages: 16    Published: Jan 1999

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Abstract

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.