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http://dx.doi.org/10.3744/SNAK.2009.46.6.611

Fracture Estimation of Stiffened Plates under Impact Loading using Micromechanics Plasticity Model  

Choung, Joon-Mo (Dep' t of Naval Architecture and Ocean Engineering, Inha University)
Cho, Sang-Rai (School of Naval Architecture and Ocean Engineering, University of Ulsan)
Kim, Kyung-Su (Dep' t of Naval Architecture and Ocean Engineering, Inha University)
Publication Information
Journal of the Society of Naval Architects of Korea / v.46, no.6, 2009 , pp. 611-621 More about this Journal
Abstract
This paper first reviews the physical meanings and the expressions of two representative strain rate models: CSM (Cowper-Symonds Model) and JCM (Johnson-Cook Model). Since it is known that the CSM and the JCM are suitable for low-intermediate and intermediate-high rate ranges, many studies regarding marine accidents such as ship collision/grounding and explosion in FPSO have employed the CSM. A formula to predict the material constant of the CSM is introduced from literature survey. Numerical simulations with two different material constitutive equations, classical metal plasticity model based on von Mises yield function and micromechanical porous plasticity model based on Gurson yield function, have been carried out for the stiffened plates under impact loading. Simulation results coincide with experimental results better when using the porous plasticity model.
Keywords
Stiffened plate; Impact test; von Mises yield function; Gurson yield function; Equivalent plastic strain; Void volume fraction; Strain rate;
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Times Cited By KSCI : 1  (Citation Analysis)
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