Thermoviscoelastic analysis of stress in composite structures-micro-to-structural approach

Liri Shemesh, Jacob Aboudi, Rami Eliasi, David Livshits

Research output: Contribution to journalArticlepeer-review

Abstract

Manufacturing of composite materials is usually accompanied with residual stresses. These stresses should be evaluated and assessed. To this end, a micromechanical model for periodic material whose temperature dependent constituents behave as thermorheologically complex materials (TCM) has been developed. This model, referred as the high fidelity generalized method of cells (HFGMC), takes into account the detailed interaction between the fiber and resin, their volume ratios, the fibers distribution and their waviness. This model is linked, in conjunction with a special UMAT subroutine, to the ABAQUS finite element code for prediction of the response of thermoviscoelastic composite structures during cool down process. The present investigation shows the effect of the cool down rate on the residual stress developed in the composite cylindrical structures.

Original languageEnglish
Pages (from-to)191-194
Number of pages4
JournalTransactions of Nanjing University of Aeronautics and Astronautics
Volume31
Issue number2
StatePublished - Apr 2014

Keywords

  • Cool down
  • Epoxy
  • Finite element method (FEM)
  • High fidelity generalized method of cells (HFGMC)
  • Thermorheologically complex materials (TCM)

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