Predictive capability of a new mori-tanaka micromechanical model for particulate composites

摘要

The objective of this study was to develop a micromechanical model that accounts for material nonlinearity due to matrix nonlinear behavior and inclusion debonding in polymeric particulate composites. An existing model was improved by using a new modulus prediction routine based on the work of Mori-Tanaka and Ju-Chen and by incorporating a nonlinear elastic matrix description. The modulus prediction routine accounted for particle interaction and described more accurately the effects of a debonded inclusion on overall mechanical properties. A critical analysis using data from glass bead/HTPB composites showed that debonding of largest to smallest par-ticles throughout the monotonic strain history was a reasonable assumption. There were indications that particles did not fully debond. A sensitivity analyses revealed that overall behavior was controlled by particle-matrix adhesive characteristics. For glass bead/HTPB, glass based/PU and glass bead/HDPE composites, the model was capable of predicting mechanical behavior as long as suitable adhesive characteristic values were available.