Mode II delamination toughness of z-pinned laminates

Yan, Wenyi and 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. ISSN 0266-3538

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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.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: © 2004 Elsevier Ltd. All rights reserved. Published version deposited in accordance with the copyright policy of the publisher.
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Mechanical and Mechatronic Engineering
Date Deposited: 11 Oct 2007 00:15
Last Modified: 29 Aug 2013 23:36
Uncontrolled Keywords: fracture (delamination) toughness; laminates; delamination; computational simulation; z-pin reinforcement
Fields of Research : 09 Engineering > 0905 Civil Engineering > 090503 Construction Materials
09 Engineering > 0912 Materials Engineering > 091202 Composite and Hybrid Materials
09 Engineering > 0913 Mechanical Engineering > 091307 Numerical Modelling and Mechanical Characterisation
Socio-Economic Objective: B Economic Development > 87 Construction > 8703 Construction Materials Performance and Processes > 870399 Construction Materials Performance and Processes not elsewhere classified
Identification Number or DOI: 10.1016/j.compscitech.2004.02.008

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