This paper studies intergranular creep failure of high temperature service material under a stress-controlled unbalanced cyclic loading condition. The grain boundary rupture process was numerically analyzed using Tvergaard’s axisymetric model. The present numerical model incorporated the experimentally verified Murakami-Ohno cyclic strain hardening creep law and Norton’s creep law. The numerical results show that void growth accelerates under cyclic loading condition. Also, analysis shows that a steady state creep law is not sufficient to analyze damage evolution under cyclic loading conditions.
- Pressure Vessels and Piping Division
Unresolved Issues With Regard to Creep and Creep Fatigue Life Prediction
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Oh, J, Katsube, N, & Brust, FW. "Unresolved Issues With Regard to Creep and Creep Fatigue Life Prediction." Proceedings of the ASME 2002 Pressure Vessels and Piping Conference. New and Emerging Computational Methods: Applications to Fracture, Damage, and Reliability. Vancouver, BC, Canada. August 5–9, 2002. pp. 3-15. ASME. https://doi.org/10.1115/PVP2002-1190
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