A robust fatigue parameter determination method for a local fatigue cohesive zone model

In this work, a robust method for determining the input fatigue parameters of a fatigue cohesive zone model recently developed by D ' avila is presented. The method is based on surrogate modelling and multi objective optimization. Experimental data from delamination tests is used for the parameter determination, highlighting the phenomenological nature of the model. The ability to simulate both fatigue onset and propagation is verified for two different monotonic cohesive laws. The predictive capability of the methodology is validated against the experimental results of a partially reinforced double cantilever beam specimen (R-DCB) with non-self-similar crack propagation.

Automated summary

In this study, a robust method based on surrogate modelling and multi objective optimization is presented for determining the input fatigue parameters of a fatigue cohesive zone model. The parameter determination is conducted using experimental data from delamination tests, emphasizing the phenomenological nature of the model. The capability to simulate both fatigue onset and propagation is validated for two different monotonic cohesive laws. The methodology's predictive capability is further validated against experimental results of a partially reinforced double cantilever beam specimen (R-DCB) with non-self-similar crack propagation.