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Modelling matrix damage and fibre-matrix interfacial decohesion in composite laminates via a multi-fibre multi-layer representative volume element ((MRVE)-R-2)

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Title Modelling matrix damage and fibre-matrix interfacial decohesion in composite laminates via a multi-fibre multi-layer representative volume element ((MRVE)-R-2)
 
Creator SONI, G
SINGH, R
MITRA, M
FALZON, BG
 
Subject Matrix damage
Fibre-matrix debonding initiation and propagation
Multi-scale modelling
Multi-fibre multi-layer representative volume element
PERIODIC BOUNDARY-CONDITIONS
UNIT-CELL
TRANSVERSE COMPRESSION
MECHANICAL-BEHAVIOR
PREDICTION
SHEAR
 
Description A three-dimensional multi-fibre multi-layer micromechanical finite element model was developed for the prediction of mechanical behaviour and damage response of composite laminates. Material response and micro-scale damage mechanism of cross-ply, (0/90](ns), and angle-ply, [+/- 45](ns), glass-fibre/epoxy laminates were captured using multi-scale modelling via computational micromechanics. The framework of the homogenization theory for periodic media was used for the analysis of the proposed 'multi-fibre multi-layer representative volume element' ((MRVE)-R-2). Each layer in (MRVE)-R-2 was represented by a unit cube with multiple randomly distributed, but longitudinally aligned, fibres of equal diameter and with a volume fraction corresponding to that of each lamina (equal in the present case). Periodic boundary conditions were applied to all the faces of the (MRVE)-R-2. The non-homogeneous stress-strain fields within the (MRVE)-R-2 were related to the average stresses and strains by using Gauss' theorem in conjunction with the Hill-Mandal strain energy equivalence principle. The global material response predicted by the (MRVE)-R-2 was found to be in good agreement with experimental results for both laminates. The model was used to study effect of matrix friction angle and cohesive strength of the fibre-matrix interface on the global material response. In addition, the (MRVE)-R-2 was also used to predict initiation and propagation of fibre-matrix interfacial decohesion and propagation at every point in the laminae. (C) 2013 Elsevier Ltd. All rights reserved.
 
Publisher PERGAMON-ELSEVIER SCIENCE LTD
 
Date 2014-12-28T17:44:58Z
2014-12-28T17:44:58Z
2014
 
Type Article
 
Identifier INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES, 51(2)449-461
0020-7683
1879-2146
http://dx.doi.org/10.1016/j.ijsolstr.2013.10.018
http://dspace.library.iitb.ac.in/jspui/handle/100/17022
 
Language English