INTERFACIAL FRACTURE TOUGHNESS OF UNCONVENTIONAL SPECIMENS: SOME KEY ISSUES

Laboratory specimens used to assess the interfacial fracture toughness of layered materials can be classified as either conventional or unconventional. We call a specimen cut from unidirectional composite laminate an adhesive joint between two identical adherents. Assessing using is common practice guided by international test standards. In contrast, we term unconventional resulting from, for instance, bimaterial joints, fiber metal laminates, laminates with elastically coupled behavior residual stresses. This paper deals and highlights key issues in determining their toughness(es) based on tests. Firstly, mode decoupling partitioning approaches are briefly discussed tools extract pure-mode toughnesses that experiences mixed-mode during testing. Next, elaborate effects bending-extension coupling thermal stresses often appearing reviewing major mechanical models consider those effects. Lastly, reviews our previous analytical surpass state-of-the-art they while also offer partitioning.