Mini-constitutive finite element model for plastic response of unidirectional fiber composites

L. Parietti, S. Y. Hsu, O. H. Griffin

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

A micromechanical finite element model to compute the overall instantaneous stiffness of fiber-reinforced composites in elastoplastic response is presented. This model is applicable to a periodic diamond array of elastic circular fibers embedded in an elastic-plastic matrix subjected to a plane stress loading. This model enforces symmetry and anti-symmetry conditions isolating the smallest unit cell and should greatly increase the speed of doing "built-in" micromechanics within a larger finite element program, because of the small number of degrees of freedom (12-14 DOF). At this stage of development, effective properties of a composite with a nearly incompressible matrix are presented to assess the model's plasticity performance. Comparison with a fine grid finite element solution shows very good results and demonstrates the effectiveness of the mini-model presented.

Original languageEnglish
Pages (from-to)463-470
Number of pages8
JournalComputers and Structures
Volume55
Issue number3
DOIs
Publication statusPublished - 1995 May 3

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Modelling and Simulation
  • Materials Science(all)
  • Mechanical Engineering
  • Computer Science Applications

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