COMPUTATIONAL MICROSTRUCTURE-BASED ANALYSIS OF RESIDUAL STRESS EVOLUTION IN METAL-MATRIX COMPOSITE MATERIALS DURING THERMOMECHANICAL LOADING

A technique for computer simulation of three-dimensional structures materials with reinforcing particles complex irregular shapes observed in the experiments is proposed, which assumes scale invariance natural mechanical fragmentation. Two-phase metal-matrix composites and coatings different spatial scales are created, randomly distributed over matrix coating computational domains. Using titanium carbide particle embedded into aluminum as an example, plastic strain localization residual stress formation along matrix-particle interface numerically investigated during cooling followed by compression or tension composite. detailed analysis performed to evaluate concentration local regions bulk formed under all-round uniaxial composite due concave convex interfacial asperities.