Mode II delamination toughness of z-pinned laminates

Article


Yan, Wenyi, Liu, Hong-Yuan and Mai, Yiu-Wing. 2004. "Mode II delamination toughness of z-pinned laminates." Composites Science and Technology. 64 (13-14), pp. 1937-1945. https://doi.org/10.1016/j.compscitech.2004.02.008
Article Title

Mode II delamination toughness of z-pinned laminates

ERA Journal ID4884
Article CategoryArticle
AuthorsYan, Wenyi (Author), Liu, Hong-Yuan (Author) and Mai, Yiu-Wing (Author)
Journal TitleComposites Science and Technology
Journal Citation64 (13-14), pp. 1937-1945
Number of Pages9
Year2004
PublisherElsevier
Place of PublicationOxford, United Kingdom
ISSN0266-3538
1879-1050
Digital Object Identifier (DOI)https://doi.org/10.1016/j.compscitech.2004.02.008
Web Address (URL)https://www.sciencedirect.com/science/article/pii/S0266353804000478
Abstract

Mode II delamination toughness of z-pin reinforced composite laminates is investigated using the finite element (FE) method. The z-pin pullout process is simulated by the deformation and breakage of non-linear springs. A critical shear stress criterion based on linear elastic
fracture mechanics is used to simulate crack growth in an end-notched flexure (ENF) beam made of z-pinned laminates. The mode II toughness is quantified by the potential energy
release rate calculated using the contour integral method. This FE model is verified for an unpinned ENF composite beam. Numerical results obtained indicate that z-pins can
significantly increase the mode II delamination toughness of composite laminate. The effects of design variables on the toughness enhancement of z-pinned laminates are also studied, which provide an important technological base and useful data to optimise and improve the z-pinning technique.

Keywordsfracture (delamination) toughness; laminates; delamination; computational simulation; z-pin reinforcement
ANZSRC Field of Research 2020400505. Construction materials
401602. Composite and hybrid materials
401706. Numerical modelling and mechanical characterisation
Public Notes

© 2004 Elsevier Ltd. All rights reserved. Published version deposited in accordance with the copyright policy of the publisher.

Byline AffiliationsComputational Engineering and Science Research Centre
University of Sydney
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