Fracture mechanics of bonding interface: a cohesive zone model

• Published in: Sensors and Actuators A: Physical Vol. 99; no. 1; pp. 198 - 206
• Main Authors: Kishimoto, K., Omiya, M., Yang, W.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Lausanne Elsevier B.V 01.04.2002; Elsevier BV; Elsevier Science
• Subjects: Cohesive force model; Condensed matter: structure, mechanical and thermal properties; Exact sciences and technology; Fatigue, brittleness, fracture, and cracks; Fracture criterion; Fracture toughness; Interface crack; Mechanical and acoustical properties; Mechanical and acoustical properties of condensed matter; Mechanical properties of solids; Physical properties of thin films, nonelectronic; Physics; Stress intensity factor; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties); Cohesive force model; Interface crack; Stress intensity factor; Fracture criterion; Fracture toughness; Interfaces; Interface properties; Stress intensity factors; Fracture mechanics; Digital simulation; Theoretical study; Mechanical properties
• ISSN: 0924-4247; 1873-3069
• DOI: 10.1016/S0924-4247(01)00884-6

The initiation of the interface crack propagation is analyzed by the finite element method in which a cohesive model is embedded along the line extending ahead of the crack-tip. The constitutive equation of the cohesive model formulated by Ma and Kishimoto is employed. The critical stress intensity factors at the crack initiation are evaluated for a wide range of bimaterial constant and the fracture boundary curves are obtained. It is shown that if the characteristic length existing in the definition of the interface stress intensity factors is chosen suitably the fracture boundary curves converges to one unique boundary curve, which is considered to be the intrinsic fracture boundary curve. The effect of plastic deformation is also examined. The results show that the fracture boundary curves are influenced by the plastic deformation especially when the shear stress is dominant.