OS0823 Model for fatigue crack growth arrest by overload in work-hardening elastic-plastic materials
Details
We propose a model for overload effects on the fatigue crack growth (FCG) threshold of work-hardening elastic-plastic materials at various stress ratios R ≥ 0 by evaluating the effective residual stress intensity factor K_<rs> at crack-tip, which combines elastic-plastic analysis using the finite element method and a theoretical-model-based calculation. Using this method, we evaluate the actual maximum and minimum stress intensity factor and actual stress ratio at the fatigue crack tip in SUS316. The nominal maximum threshold stress intensity factor ^NK_<max,th> values for various R estimated by the model agree well with reported experimental results, demonstrating the model's validity.
