This paper presents a micro-mechanical model of ductile fracture for the API X65 steel using the Gurson-Tvergaard-Needleman (GTN) model. Experimental tests and FE damage simulations using the GTN model are performed for smooth and notched tensile bars, from which the parameters in the GTN model are calibrated. As application, the developed GTN model is applied to simulate small-sized, single-edge-cracked tensile and bend bars, via three-dimensional FE damage analyses. Comparison with experimental test data shows overall good agreements.
Finite Element Ductile Failure Simulations of Tensile and Bend Bars Made of API X65 Steels
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Kim, Y, Oh, C, Song, T, & Shim, D. "Finite Element Ductile Failure Simulations of Tensile and Bend Bars Made of API X65 Steels." Proceedings of the ASME 2007 Pressure Vessels and Piping Conference. Volume 6: Materials and Fabrication. San Antonio, Texas, USA. July 22–26, 2007. pp. 551-560. ASME. https://doi.org/10.1115/PVP2007-26218
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