Dynamic Fracture of Functionally Graded Composites Using an Intrinsic Cohesive Zone Model
This paper presents a Cohesive Zone Model (CZM) approach for investigating dy- namic failure processes in homogeneous and Functionally Graded Materials (FGMs). The failure criterion is incorporated in the CZM using both a ßnite cohesive strength and work to fracture in the material description. A novel CZM for FGMs is explored and incorporated into a ßnite element framework. The material gradation is approximated at the element level using a graded element formulation. A numerical example is provided to demonstrate the eácacy of the CZM approach, in which the inàuence of the material gradation on the crack branching pattern is studied.
Omer Van der Biest, Michael Gasik, Jozef Vleugels
G. H. Paulino and Z. Y. Zhang, "Dynamic Fracture of Functionally Graded Composites Using an Intrinsic Cohesive Zone Model ", Materials Science Forum, Vols. 492-493, pp. 447-452, 2005