Computational Mechanics and Design Group

Department of Civil & Structural Engineering

Research Seminar - René de Borst

René de Borst

Date/time

20/11/2013 - 15:00 to 16:00

Speakers

René de Borst

Venue

LT4, Mappin Building, University of Sheffield, Mappin Street, Sheffield, S1 3JD.

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.