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http://dx.doi.org/10.3795/KSME-A.2003.27.6.914

Non-Local Analysis of Forming Limits of Ductile Material Considering Damage Growth  

Kim, Young-Suk (경북대학교 기계공학부)
Won, Sung-Yeun (경북대학교 대학원 기계공학과)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.27, no.6, 2003 , pp. 914-922 More about this Journal
Abstract
In this paper, the strain localization of voided ductile material has been analyzed by nonlocal plasticity formulation in which the yield strength not only depends on an equivalent plastic strain measure (hardening parameter), but also on the Laplacian thereof. The gradient terms in yield criterion show an important role on modeling strain-softening phenomena of material. The influence of the mesh size on the elastic -plastic deformation behavior and the effect of the characteristic length parameter for localization prediction are also investigated. The proposed nonlocal plasticity shows that the load -strain curves converge to one curve. Results using nonlocal plasticity also exhibit the dependence of mesh size is much less sensitivity than that for a corresponding local plasticity formulation.
Keywords
Non-Local; Characteristic Length; Void; Gradient-Dependent Plasticity;
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