Finite Element Analysis of Tensile Behavior of Ductile Steel with Defects
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The 34CrMo4 material as an excellent alloy has been increasingly applied to the design and manufacture of pressure vessel and piping. However, the potential geometrical defects affect their mechanical performance to some extent. In this article, a parametric finite element analysis using ANSYS-APDL (Ansys Parametric Design Langrage) is performed to predict the tensile behavior of the 34CrMo4 steel rectangular tensile specimens with defects using the Gurson–Tvergaar–Needleman model which was originally developed to describe the ductile fracture initiation of metals. The defects are simulated using the node deflection technique and the influence of various defect sizes and material parameters on the tensile results is investigated. By comparison, the predicted tensile results using finite element analysis are in good agreement with those by experiments in terms of the elongation and tensile strengths. Besides, results show both the elongation and the tensile strength decrease with increasing defect sizes, but the defects affect the elongation more remarkably than the tensile strength.
Keywords34CrMo4 steel Failure analysis Defects
This research is supported by the research fund for the doctoral program of high education of China (Number: 20090101120161), the Tang’s fund in the Department of Chemical Engineering in Zhejiang University, the high-technology research and development program (863 key program) of China (Number: 2009AA044801) and the key project Chinese universities scientific funding of Zhejiang University.
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