Identification of material parameters of the cohesive law in delamination of laminated composites

There are several methods for prediction of delamination in composites, among which the cohesive zone model (CZM) is one of the best. There are several material parameters in various CZMs that have a prominent effect on the model's accuracy. In the present study, an inverse methodology is proposed for obtaining the material constants of various traction-separation laws of the delamination phenomenon in composites materials. Linear and exponential cohesive laws are utilized in this research to predict the delamination behavior. Through a numerical example, effectiveness of the proposed method for identification of the material parameters of the cohesive laws is assessed. Moreover, the effect of initial guesses and also the measurement error on the overall performance of the proposed method are investigated.

کلیدواژه ها:

Delamination ، Cohesive zone model ، Inverse analysis ، Finite element method ، Double cantilever beam