The effect of damage due to particle debonding on the constitutive response of highly filled composites is investigated using two multiscale homogenization schemes: one based on a closed-form micromechanics solution, and the other on the finite element implementation of the mathematical theory of homogenization. In both cases, the particle debonding process is modeled using a bilinear cohesive law which relates cohesive tractions to displacement jumps along the particle–matrix interface. The analysis is performed in plane strain with linear kinematics. A detailed comparative assessment between the two homogenization schemes is presented, with emphasis on the effect of volume fraction, particle size and particle-to-particle interaction.
This work was supported by the Center for Simulation of Advanced Rockets (CSAR) under Contract number B341494 by the US Department of Energy. K. Matouš and P.H. Geubelle also acknowledge support from ATK/Thiokol (Program Managers, J. Thompson and Dr. I. L. Davis). H. Tan and Y. Huang acknowledge additional support from ONR Composites for Marine Structures Program (Grant N00014-01-1-0205, Program Manager Dr. Y.D.S. Rajapakse).
- Particle-reinforced composites
- Damage mechanics