This paper presents an experimental and numerical study of the mechanical behaviour of Alloy 800 tubes with a circumferential crack-like throughwall flaw. The crack-like throughwall flaw was simulated as a slot fabricated by Electron Discharge Machining (EDM). A digital image correlation (DIC) method is employed to measure the distribution of strain and the deformed EDM slot profile during the tension test. A Finite Element Analysis (FEA) model in ANSYS is then developed to predict the mechanical behaviour of Alloy 800 steam generator (SG) tubing in the tension tests. The FEA model with a verified material stress-strain curve and the calibrated failure criterion is applied to simulate the burst test of SG tubing with a circumferential crack-like throughwall flaw. The maximum allowable size for a circumferential throughwall crack is recommended based on FEA simulations.
Mechanical Behaviour of Alloy 800 Steam Generator Tube With a Circumferential Crack-Like Throughwall Flaw
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Wang, C, Duan, X, & Jain, M. "Mechanical Behaviour of Alloy 800 Steam Generator Tube With a Circumferential Crack-Like Throughwall Flaw." Proceedings of the ASME 2011 Pressure Vessels and Piping Conference. Volume 2: Computer Technology and Bolted Joints. Baltimore, Maryland, USA. July 17–21, 2011. pp. 93-105. ASME. https://doi.org/10.1115/PVP2011-57161
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