Journal Article


M. D. Gilchrist
N. Svensson



experimental data mixed mode delamination interlaminar fracture surface roughness energy formation carbon fibre epoxy laminates

Mixed Mode delamination of multidirectional carbon fibre/epoxy laminates (1998)

Abstract Scanning electron microscopy was used to identify fractographic features that are characteristic of different modes of interlaminar fracture. The cusp angle and the amount of fiber pull-out on the fracture surface can be used to characterize the different loading modes. A large amount of fiber pull-out is the dominant feature of a mode I fracture, while in mode II large cusp angles and many cusps are the main characteristics. The amount of fiber pull-out, and subsequently brokenfibers, per unit area was investigated and found to vary in proportion to the degree of mode I loading. Such methods can be used to analyze failure and the propagation ofdelamination in structural components. The energy associated with cusp formation constitutes a large proportion of the mode IIfracture toughness component, while the amount of fiber pull-out and fracture has a considerable influence on the mode I fracture component. The cusp angle was seen to provide a quantitative measure of the fracture surface roughness. A failure criterion that takes the fracture surface appearance into account was evaluated. The cusp angle was subsequently used to modify this failure criterion. As a consequence, this provided improved agreement with the experimental data.
Collections Ireland -> University College Dublin -> Mechanical & Materials Engineering Research Collection
Ireland -> University College Dublin -> College of Engineering & Architecture
Ireland -> University College Dublin -> School of Mechanical and Materials Engineering

Full list of authors on original publication

M. D. Gilchrist, N. Svensson

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M. D. Gilchrist
University College Dublin
Total Publications: 172