Finite element analysis of localization in FCC polycrystalline sheets under plane stress tension |
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| Institution: | 4. School of Mechanical and Control Engineering, Handong Global University, Pohang, Republic of Korea;1. School of Physics, The University of Sydney, NSW 2006, Australia;2. Thin Film Physics, Linköping University, 581 83 Linköping, Sweden;1. Department of Mechanical Engineering, KAIST, Science Town, Daejeon, 305-701, Republic of Korea;2. Institute for Frontier Materials, Deakin University, Geelong Waurn Ponds, VIC 3220, Australia;3. Manufacturing Systems Research Lab, General Motors R&D Center, Warren, MI, USA |
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| Abstract: | Localization phenomena in thin sheets subjected to plane stress tension are investigated. The sheet is modelled as a polycrystalline aggregate, and a finite element analysis based on rate-dependent crystal plasticity is developed to simulate large strain behaviour. Accordingly, each material point in the specimen is considered to be a polycrystalline aggregate consisting of a large number of FCC grains. The Taylor model of crystal plasticity theory is assumed. This analysis accounts for initial textures as well as texture evolution during large plastic deformations. The numerical analysis incorporates certain parallel computing features. Simulations have been carried out for an aluminum sheet alloy, and the effects of various parameters on the formation and prediction of localized deformation (in the form of necking and/or in-plane shear bands) are examined. |
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