A finite strain, finite band method for modeling ductile fracture |
| |
Authors: | AE Huespe A NeedlemanJ Oliver PJ Sánchez |
| |
Institution: | a CIMEC-INTEC-UNL-CONICET, Güemes 3450, 3000 Santa Fe, Argentina b Department of Materials Science and Engineering, College of Engineering and Center for Advanced Scientific Computing and Modeling, University of North Texas, Denton, TX, United States c ETSECCP, Technical University of Catalonia, Barcelona, Spain d GIMNI-UTN-FRSF, Lavaisse 610, 3000 Santa Fe, Argentina |
| |
Abstract: | We present a finite deformation generalization of the finite thickness embedded discontinuity formulation presented in our previous paper A.E. Huespe, A. Needleman, J. Oliver, P.J. Sánchez, A finite thickness band method for ductile fracture analysis, Int. J. Plasticity 25 (2009) 2349-2365]. In this framework the transition from a weak discontinuity to a strong discontinuity can occur using a single constitutive relation which is of importance in a range of applications, in particular ductile fracture, where localization typically precedes the creation of new free surface. An embedded weak discontinuity is introduced when the loss of ellipticity condition is met. The resulting localized deformation band is given a specified thickness which introduces a length scale thus providing a regularization of the post-localization response. The methodology is illustrated through several example problems emphasizing finite deformation effects including the development of a cup-cone failure in round bar tension. |
| |
Keywords: | Ductile fracture modeling Finite element methods Finite strain plasticity Embedded weak discontinuities Regularization |
本文献已被 ScienceDirect 等数据库收录! |
|