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http://dx.doi.org/10.5574/KSOE.2014.28.1.034

Fracture Simulation of Low-Temperature High-Strength Steel (EH36) using User-Subroutine of Commercial Finite Element Code  

Choung, Joonmo (Department of Naval Architecture and Ocean Engineering, Inha University)
Nam, Woongshik (Department of Naval Architecture and Ocean Engineering, Inha University)
Kim, Younghun (Department of Naval Architecture, Ocean and IT Engineering, Kyungnam University)
Publication Information
Journal of Ocean Engineering and Technology / v.28, no.1, 2014 , pp. 34-46 More about this Journal
Abstract
This paper discusses a new formulation for the failure strain in the average stress triaxiaility domain for a low-temperature high-strength steel (EH36). The new formula available at a low average stress triaxiality zone is proposed based on the comparison of two results from tensile tests of flat type specimens and their numerical simulations. In order to confirm the validity of the failure strain formulation, a user-subroutine was developed using Abaqus/Explicit, which is known to be one of the most popular commercial finite element analysis codes. Numerical fracture simulations with the user-subroutine were conducted for all the tensile tests. A comparison of the engineering stress-strain curves and engineering failure strain obtained from the numerical simulation with the user-subroutine for the tensile tests revealed that the newly developed user-subroutine effectively predicts the initiation of failure.
Keywords
Average stress triaxiality; Failure strain; True stress; User-subroutine;
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Times Cited By KSCI : 2  (Citation Analysis)
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