The extended finite element method for large deformation ductile fracture problems with a non-local damage-plasticity model

Modelling of localized ductile fracture with volumetric locking‐free tetrahedral elements

“…In this study, due to the lack of such information, we adopt a value of l m = 0.3 mm, which is within a widely adopted range of 0.3 to 0.5 mm in many nonlocal ductile fracture models. [54][55][56] The material parameters adopted are shown in Table 1. Note that different damage parameters are adopted for the conventional and localizing gradient enhanced models, to match the experimentally obtained softening response.…”

X-FEM modeling of large plasticity deformation; a convergence study on various blending strategies for weak discontinuities

“…In order to model the weak discontinuities in large deformations, the Lagrangian formulation is employed in the framework of X-FEM technique (Broumand & Khoei, 2013;Khoei, Biabanaki, & Anahid, 2008). Since the enrichment function (x) is defined on an initial undeformed configuration, an appropriate mapping is used to transfer the values of enrichment functions on the current configuration in an updated Lagrangian framework.…”

Experimental characterization and numerical prediction of ductile damage in forming of AA1050-O sheets

“…Commonly, softening induced by the full coupling of damage with local models induces an important dependence on the mesh size. In order to avoid this complex problem, various non-local models are developed in the literature (Brunet et al, 2005, Broumand andKhoei, 2013). Another way used in this framework to avoid this problem is to identify the mesh size ∆x within material parameters.…”