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- W1971890501 abstract "The effort of this study is to develop a simulation method to predict the effect of micro-structural morphology in two-phase steel on structural performance in terms of ductile cracking resistance. This is based on the clarification of a mechanism to control the ductile cracking with focusing on the heterogeneity in strength of microstructure. The particular number of micro-voids formation at lower strength side near two-phase boundary associated with the localization of stress/strain was found to control ductile cracking. According to this experimental result, we developed meso-scale 3D-model to reproduce micro-structural morphology of practical two-phase steel of interest for analyzing the behaviors of stress/strain localization associated with heterogeneous microstructure. Moreover, damage evolution model to nucleate micro-void was proposed taking into account the decreasing yield strength due to damage, which is based on the GTN (Gurson-Tvergaard-Needleman) model, so that ductile crack nucleation and subsequent growth could be simulated. The ductile cracking behavior for two-phase structural steel was simulated by means of developed meso-scale micro-structural FE-model together with damage evolution model. The effect of applied triaxial stress state on critical macro-strain for ductile cracking, in which critical strain could be decreased with increasing stress triaxiality, was numerically simulated." @default.
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- W1971890501 date "2007-03-01" @default.
- W1971890501 modified "2023-09-26" @default.
- W1971890501 title "Simulation of Ductile Damage in Two-Phase Structural Steel with Meso-Scale Model" @default.
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- W1971890501 doi "https://doi.org/10.4028/www.scientific.net/msf.539-543.2168" @default.
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