The analytical solution and computational results were compared.
The whole system behavior was modeled using ABAQUS 6.14 to obtain stress-displacement relationship. The softening condition was obtained by analytical and finite element method. The cohesive interface was modeled with a traction-separation linear relationship and for the solids continuum elastic constitutive models were used. In this study, the softening condition behavior of a cohesive interface between two identical materials was assessed for different stiffness values of solid and cohesive. If the displacement jump is greater than a characteristic length (Sn), complete failure occurs. Cohesive interactions are generally a function of displacement jump (or separation). The definition of a traction-separation relationship is a fundamental issue in cohesive zone models because it describes the nonlinear fracture process.
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