Numerical study on the mode I delamination toughness of z-pinned laminates

Article

Yan, Wenyi, Liu, Hong-Yuan and Mai, Yiu-Wing. 2003. "Numerical study on the mode I delamination toughness of z-pinned laminates." Composites Science and Technology. 63 (10), pp. 1481-1493. https://doi.org/10.1016/S0266-3538(03)00167-2
Article Title

Numerical study on the mode I 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 Citation63 (10), pp. 1481-1493
Number of Pages13
Year2003
PublisherElsevier
Place of PublicationOxford, United Kingdom
ISSN0266-3538
1879-1050
Digital Object Identifier (DOI)https://doi.org/10.1016/S0266-3538(03)00167-2
Web Address (URL)http://www.sciencedirect.com/science/article/pii/S0266353803001672
Abstract

A finite element (FE) model is developed to investigate mode I delamination toughness of z-pin reinforced composite laminates. The z-pin pull-out process is simulated by the
deformation of a set of non-linear springs. A critical crack opening displacement (COD) criterion is used to simulate crack growth in a double-cantilever-beam (DCB) made of z-pinned laminates. The toughness of the structure is quantified by the energy release rate, which is calculated using the contour integral method. The FE model is verified for both unpinned and z-pinned laminates. Predicted loading forces from FE analysis are compared to
available test data. Good agreement is achieved. Our numerical results indicate that z-pins can greatly increase the mode I delamination toughness of the composite laminates. The influence of design parameters on the toughness enhancement of z-pinned laminates is also investigated, which provides important information to optimise and improve the z-pinning technique.

Keywordsfracture toughness; laminates; delamination; computational simulation; z-pin reinforcement
ANZSRC Field of Research 2020401602. Composite and hybrid materials
490109. Theoretical and applied mechanics
401706. Numerical modelling and mechanical characterisation
Public Notes

© 2003 Elsevier Science Ltd. All rights reserved. Published version deposited in accordance with the copyright policy of the publisher.

Byline AffiliationsUniversity of Sydney
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