High-fidelity micro-scale modeling of the thermo-visco-plastic behavior of carbon fiber polymer matrix composites

Xiaoming Bai, Miguel A. Bessa, António R. Melro, Pedro P. Camanho, Licheng Guo*, Wing K. Liu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

50 Scopus citations

Abstract

An experimentally validated micro-scale analysis of the visco-thermo-mechanical behavior of polymer matrix composites under different loads is proposed. A new constitutive law for the matrix material is developed taking into account the pressure dependence of the material as well as strain-rate and temperature dependence. Capturing the matrix behavior under multi-axial stress states is concluded to be essential to accurately predict the composite material behavior, even when considering simple load cases such as transverse compression and/or shear. Without any calibration procedure at the composite level, good agreement with the experimental data is observed for different loading conditions, including strain-rate dependency.Using this validated micro-scale model, a three-dimensional simulation of the formation of a kink band under longitudinal compression of the composite is conducted. A new evidence at micro-scale is found supporting the hypothesis that shear stresses transferred between fibers and matrix are particularly important in the formation of the kink band.

Original languageEnglish (US)
Pages (from-to)132-141
Number of pages10
JournalComposite Structures
Volume134
DOIs
StatePublished - Dec 15 2015

Keywords

  • A. Epoxy
  • A. Polymer matrix composite (PMC)
  • B. Thermo-visco-plasticity
  • C. Kink band
  • C. Micro-scale

ASJC Scopus subject areas

  • Ceramics and Composites
  • Civil and Structural Engineering

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