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Damage Coupled Viscoplastic Modeling of Particulate Composites With Imperfect Interphase

  1. Cemal Basaran,
  2. Shihua Nie,
  3. Eray M. Gunel

Published Online: 20 JUL 2012

DOI: 10.1002/9781118097298.weoc063

Wiley Encyclopedia of Composites

Wiley Encyclopedia of Composites

How to Cite

Basaran, C., Nie, S. and Gunel, E. M. 2012. Damage Coupled Viscoplastic Modeling of Particulate Composites With Imperfect Interphase. Wiley Encyclopedia of Composites. 1–15.

Author Information

  1. University at Buffalo, The State University of New York, Buffalo, NY

Publication History

  1. Published Online: 20 JUL 2012

Abstract

A micromechanical damage model is proposed to predict the overall viscoplastic behavior and damage evolution in particulate polymer composites with imperfect interfacial bonds. The constituents are treated as three distinct phases, consisting of agglomerate of particles, bulk matrix, and interfacial transition zone around the agglomerate. The influence of the interfacial transition zone on the overall mechanical behavior of composites is studied analytically and experimentally. Test data on particle-filled acrylic composites with three different interfacial properties are presented. The coefficient of thermal expansion (CTE) mismatch between the matrix and the filler particles is also introduced into the model. A damage evolution function based on irreversible thermodynamics is also introduced into the constitutive model to describe the degradation of the composite. The efficient general return-mapping algorithm is exploited to implement the proposed unified damage-coupled viscoplastic model into finite element formulation. Furthermore, the model predictions for uniaxial loading conditions are compared with the experimental data. Both the experimental results and analytical prediction show that interfacial conditions have great influence on the elastic properties of particle-filled acrylic composites.

Keywords:

  • micromechanics;
  • particulate composite;
  • interfaces;
  • interfacial bond;
  • damage