Rate-dependent Fracture

fracThe goal is to study the effects rate-dependent inelastic material behavior (e.g., viscoelasticity, viscoplasticity, and continuum damage), and rate-dependent failure mechanisms (e.g., crazing, chain pull-out) on the fracture behavior of soft materials.  We pursue this using a cohesive approach which partitions the energy dissipation rate of crack growth into inelastic processes of the bulk and failure processes of a cohesive zone of finite size. Our work focuses on developing mechanism-based cohesive models of rate-dependent failure mechanisms and numerical methods for finite element analysis of fracture and failure.