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Micromechanical Computational Analysis for the Prediction of Failure Strength of Porous Composites
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  • Journal title : Composites Research
  • Volume 29, Issue 2,  2016, pp.66-72
  • Publisher : The Korean Society for Composite Materials
  • DOI : 10.7234/composres.2016.29.2.066
 Title & Authors
Micromechanical Computational Analysis for the Prediction of Failure Strength of Porous Composites
Yang, Dae Gyu; Shin, Eui Sup;
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 Abstract
Porosity in polymer matrix composites increases rapidly during thermochemical decomposition at high temperatures. The generation of pores reduces elastic moduli and failure strengths of composite materials, and gas pressures in internal pores influence thermomechanical behaviors. In this paper, micromechanical finite element analysis is carried out by using two-dimensional representative volume elements for unidirectionally fiber-reinforced composites with porous matrix. According to the state of the pores, effective elastic moduli, poroelastic parameters and failure strengths of the overall composites are investigated in detail. In particular, it is confirmed that the failure strengths in the transvers and through-thickness directions are predicted much more weakly than the strength of nonpored matrix, and decrease consistently as the porosity of matrix increases.
 Keywords
Porous composites;Failure strength;Effective elastic moduli;Poroelastic parameter;
 Language
Korean
 Cited by
 References
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