Elastoplastic micromechanics model for multiscale analysis of metal matrix composite structures

• A model was developed for elastoplastic analyses of metal matrix composites.
• It was applied for multiscale analysis by linking constituent and composite levels.
• Thermal or mechanical residual stresses were computed at both levels.
• Various examples were provided to demonstrate the developed model.

An elastoplastic micromechanics model was developed for metal matrix composites reinforced by elastic particles, long or short fibers. The matrix material undergoes elastoplastic deformation. The model is based on a unit cell consisting of multiple subcells representing reinforcing and binding materials, respectively. The model can be implemented for multiscale analysis because it can compute mechanical properties and stresses/strains at both the constituent and composite levels and link them from one level to the other. Residual stresses at the both levels can also be computed with unloading. Elastoplastic analyses of various composites and structures were presented to demonstrate the developed model.