An analysis of 3D crack propagation using cohesive zone models and the theory of configurational forces

A continuum theory of 3D fracture with a cohesive zone model is presented. The analysis uses the theory of configurational forces and is valid for any crack propagation regime. The theory provides insight into the modeling of crack growth accompanied by progressive damage accumulation and other type s of local microstructural changes. Furthermore, it offers justification fo r the introduction of less traditional cohesive zone models which, in addit ion to the opening displacement, include other types of crack surface defor mation parameters.