A new nite element scheme for modelling fracture is presented, which extends to the case of elastodamaging interfaces the approach for elastic interfaces developed by the authors in reference [1]. The process zone is modelled as a soft elastodamaging layer, whose thickness introduces a characteristic length scale into the continuum model. When the characteristic length is nite, an extended FE model with a nite process zone is obtained. When the characteristic length vanishes, an interface model with a cohesive traction-separation law is recovered. The associated nite element formulation is based on the partition if unit property of the standard interpolation functions, and can be seen as an extended nite element formulation (xfem) with a regularized kinematics. Some results obtained for a DCB test and a plate subjected to shear loading are synthetically presented.
A regularized XFEM formulation for process zone modelling
BENVENUTI, Elena;TRALLI, Antonio Michele
2007
Abstract
A new nite element scheme for modelling fracture is presented, which extends to the case of elastodamaging interfaces the approach for elastic interfaces developed by the authors in reference [1]. The process zone is modelled as a soft elastodamaging layer, whose thickness introduces a characteristic length scale into the continuum model. When the characteristic length is nite, an extended FE model with a nite process zone is obtained. When the characteristic length vanishes, an interface model with a cohesive traction-separation law is recovered. The associated nite element formulation is based on the partition if unit property of the standard interpolation functions, and can be seen as an extended nite element formulation (xfem) with a regularized kinematics. Some results obtained for a DCB test and a plate subjected to shear loading are synthetically presented.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
