101 Evaluation of Delamination along Fiber-Matrix Interface of Composites Using Periodical Cluster Model
Details
Mechanical behavior of the metal matrix composite is affected by microscopically distributed residual stress owing to interaction of fibers. A periodical cluster model is made to analyze both macro- and microscopic behavior of the composite. The fiber-matrix interface of the composite is modeled as Coulomb frictional contact under compressive residual stress. To solve for the perturbed displacement field of the composite, boundary integral formulation is introduced into the interface contact problem. The formulation enables simultaneous numerical calculations for macro- and microscopic fields to evaluate nonlinear mechanical behavior of composite.
