About the event
Mechanics of Interfaces and Evolving Discontinuities
Two main approaches can be distinguished for resolving interfaces and evolving discontinuities. Within the class of discrete models, cohesive-surface approaches are probably the most versatile, in particular for heterogeneous materials. However, limitations exist, in particular related to stress triaxiality, which cannot be captured well in standard cohesive-surface models. In this lecture, we will present an elegant enhancement of the cohesive-surface model to include stress triaxiality, which still preserves the discrete character of cohesive-surface models. Subsequently, we will outline how the cohesive-surface approach to fracture can be extended to multi-phase media, in particular fluid-saturated porous media.
Whether a discontinuity is modelled via a continuum model, or in a discrete manner, advanced discretisation methods are needed to model the internal free boundary. A most powerful method is isogeometric analysis. Examples will be given, including analyses, including delamination in layered shells.
René de Borst is currently editor-in-chief of the International Journal for Numerical Methods in Engineering, editor-in-chief of the International Journal for Numerical and Analytical Methods in Geomechanics and Regius Chair of Civil Engineering and Mechanics at the University of Glasgow.