Mode II delamination toughness of Z-pinned laminates

Yan, Wenyi, Liu, Hong-yuan and Mai, Yiu-Wing 2004, Mode II delamination toughness of Z-pinned laminates, Composites science and technology, vol. 64, no. 13-14, pp. 1937-1945, doi: 10.1016/j.compscitech.2004.02.008.

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Title Mode II delamination toughness of Z-pinned laminates
Author(s) Yan, Wenyi
Liu, Hong-yuan
Mai, Yiu-Wing
Journal name Composites science and technology
Volume number 64
Issue number 13-14
Start page 1937
End page 1945
Publisher Elsevier Applied Science Publishers
Place of publication Barking, England
Publication date 2004-10
ISSN 0266-3538
Keyword(s) B. Fracture (delamination) toughness
C. Laminates
C. Delamination
C. Computational simulation
Z-pin reinforcement
Summary Mode II delamination toughness of z-pin reinforced composite laminates is investigated using 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 provides an important technological base and useful data to optimize and improve the z-pinning technique.
Language eng
DOI 10.1016/j.compscitech.2004.02.008
Field of Research 091202 Composite and Hybrid Materials
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2004, Elsevier Ltd
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