Predicting residual stiffness of cracked composite laminates subjected to multi-axial inplane loading

M. Kashtalyan, C. Soutis

    Research output: Contribution to journalArticlepeer-review

    Abstract

    This is a contribution to the exercise that aims to benchmark and validate the current continuum damage and fracture mechanics methodologies used for predicting the mechanical behaviour of fibre-reinforced plastic composites under complex loadings. The paper describes an analytical approach to predict the effect of intra- (matrix cracking and splitting) and inter-laminar (delamination) damage on the residual stiffness properties of the laminate, which can be used in the post-initial failure analysis, taking full account of damage mode interaction. The approach is based on a two-dimensional shear lag stress analysis and the equivalent constraint model of the damaged laminate with multiple damaged plies. The application of the approach to predicting degraded stiffness properties of a multidirectional laminate with multilayer intra- and inter-laminar damage is demonstrated for [0/90/0] and [0/908/0] cross-ply laminates made from a specific glass/epoxy system under in-plane uniaxial and biaxial loading damaged by transverse and longitudinal matrix cracks and crack-induced transverse and longitudinal delamination. © The Author(s) 2013.
    Original languageEnglish
    Pages (from-to)2513-2524
    Number of pages11
    JournalJournal of Composite Materials
    Volume47
    Issue number20-21
    DOIs
    Publication statusPublished - Sept 2013

    Keywords

    • damage mechanics
    • matrix cracking
    • Polymer-matrix composites
    • transverse cracking

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