On the tensile behavior of clay–epoxy nanocomposite considering interphase debonding damage via mixed-mode cohesive zone material

This paper proposes a constitutive 3D multi-scale four-phase model of exfoliated clay/epoxy nanocomposites. The model encompasses a clay platelet, non-perfect bond interactions, an interphase region and an encircling matrix. The outcomes divulge a pronounced influence of the cohesive zone material (CZM) on the tensile behavior of the models which is more significant in higher clay weight percentage. Moreover, the results demonstrate higher load transfer efficiency in the model possessing a CZM and debonding compared with a model without a CZM. The results are consistent with published experimental investigations, and the model can be used as a viable tool to scrutinize the behaviors of clay–polymer nanocomposites.