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Journal of Engineering
Volume 2013, Article ID 973026, 9 pages
http://dx.doi.org/10.1155/2013/973026
Research Article

Prediction of Matrix Failure in Fibre Reinforced Polymer Composites

1Air Vehicles Division, Defence Science and Technology Organisation, 506 Lorimer Street, Fishermans Bend, VIC 3207, Australia
2School of Mechanical Engineering, Monash University, Clayton, VIC 3800, Australia

Received 16 January 2013; Revised 16 June 2013; Accepted 18 June 2013

Academic Editor: Tae Jin Kang

Copyright © 2013 J. Wang and W. K. Chiu. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Recent development has enabled fibre and matrix failure in a fibre reinforced composite material to be predicted separately. Matrix yield/failure prediction is based on a Von Mises strain and first strain invariant criteria. Alternative matrix failure criteria for enhanced prediction accuracy are discussed in this paper. The proposed failure envelope formed with basic failure criteria intersects with uniaxial compression, pure shear and uniaxial tensile test data points smoothly. For failure of typical neat resin, significant improvement of prediction accuracy compared with measured material data is demonstrated. For a unit cell with a fibre and surrounding matrix with typical material properties, a FEM analysis indicates a significant improvement in prediction accuracy in the pure shear load case and a marginal improvement in the biaxial tensile load case. This paper also provided a preliminary discussion about the issues when material nonlinearity of the matrix material is involved.