Finite element prediction of curing micro-residual stress distribution in polymeric composites considering hybrid interphase region

Teimouri, V.; Safarabadi, M.

Growing Science » Engineering Solid Mechanics » Finite element prediction of curing micro-residual stress distribution in polymeric composites considering hybrid interphase region

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Engineering Solid Mechanics

ISSN 2291-8752 (Online) - ISSN 2291-8744 (Print) Quarterly Publication Volume 6 Issue 1 pp. 11-20 , 2018

Finite element prediction of curing micro-residual stress distribution in polymeric composites considering hybrid interphase region Pages 11-20 Download PDF

Authors: V. Teimouri, M. Safarabadi

DOI: 10.5267/j.esm.2017.11.004

Keywords: Finite element simulation, UMAT code, Interphase, Variable properties, Residual micromechanical stress

Abstract: The interphase is a region between fibers and a matrix, which has different properties from the matrix and the fibers, but is dependent on them. Considering the interphase region has a significant effect on the accuracy of obtained residual stresses. So far, in order to obtain the micromechanical residual stresses, the interphase properties are considered as an average. In this paper, the properties of the interphase are assumed variable by using a suitable UMAT code in the ABAQUS software. The equations of previous studies that have acquired interphase properties to be variable are used to write the UMAT code. A representative volume element (RVE) in polymer composites is modeled in three phases in the ABAQUS software and the interphase properties are considered as FGM by using the UMAT code. Temperature variation during curing to environment temperature is the only loading factor in the RVE. The matrix, fiber and interphase stresses are obtained in the ABAQUS software. The achieved stresses were compared with the results of previous studies that considered interphase properties as average. Finite element and energy methods were used in previous papers but in the present study just the finite element method with variable interphase properties was use. In addition, residual stress diagrams with the variable interphase properties are plotted to study the effect of the thermal expansion coefficient. The results of this study are similar to those in previous ones, and the curves are improved.

How to cite this paper

 Teimouri, V & Safarabadi, M. (2018). Finite element prediction of curing micro-residual stress distribution in polymeric composites considering hybrid interphase region.Engineering Solid Mechanics, 6(1), 11-20.

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