Experimental Identification of Cohesive Zone Models from Thermomechanical Imaging Techniques

In recent years, cohesive zone models (CZMs) have been developed and widely used in numerical simulations to account for crack initiation and propagation in different materials and structures. This study is focused on the modeling of the elastoplastic damageable behaviour of ductile materials. The damage is associated with a cohesive behaviour of the interface between the purely elastoplastic solid elements. The recent developments in imaging techniques allow reaching local measurement fields (e.g. displacement, strain, strain rate, temperature,...). Under certain assumptions, these measurements allow us to get the distributions of local thermomechanical fields. These distributions can be used to identify the shape and the parameters of the CZM, and then ensure the thermomechanical consistency of this identified model.