• Transactions of the Korean Society of Pressure Vessels and Piping
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• v.20 no.2
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• pp.122-129
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• 2024

The International Atomic Energy Agency (IAEA) highlights the importance of maintaining the structural integrity of key safety equipments and facilities not only under design-basis earthquake but also beyond-design-basis earthquake. To ensure this integrity, it is essential to utilize appropriate elastic-plastic fatigue analysis methods for earthquake resistance. In this study, a parametric study of FE simulation for piping elbow under dynamic cyclic loading was conducted by varying the damping ratio and element density for the pipe elbow specimen for application of the JSME Code Case for elastic-plastic fatigue analysis. The elbow used in this research was made from SA403 WP316 stainless steel, used in primary and secondary piping systems of nuclear power plants. To simulate the pipe elbow test, 3-D elastic-plastic FE analysis were performed using the bi-linear kinematic hardening model. Dynamic cyclic loadings were applied at room temperature. The FE analysis was compared with experimental acceleration response and the opening-closing displacement data.