Prediction of Ductile Fracture for S235JR Steel Using the Stress Modified Critical Strain and Gurson-Tvergaard-Needleman Models
Publication: Journal of Materials in Civil Engineering
Volume 24, Issue 12
Abstract
This paper presents results of experimental and numerical modeling of ductile fracture and failure of elements made of S235JR steel subjected to static tension. The prediction of failure was generally based on the stress modified critical strain (SMCS) model. The numerical simulations were performed using the Gurson-Tvergaard-Needleman (GTN) model, which takes into consideration the material structure. The approach applied in this study was based on the computational cells with microstructurally based length scales. The cell size and initial porosity were determined through microstructural examinations of S235JR steel. The parameters of the GTN model for S235JR steel were established on the basis of the microstructural analysis and the numerical modeling of tensile strength tests. As a result, it was possible to determine the SMCS failure criterion to predict ductile fracture for S235JR steel.
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Information
Published In
Journal of Materials in Civil Engineering
Volume 24 • Issue 12 • December 2012
Pages: 1492 - 1500
Copyright
© 2012 American Society of Civil Engineers.
History
Received: Sep 12, 2011
Accepted: Apr 18, 2012
Published online: Apr 20, 2012
Published in print: Dec 1, 2012
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