Numerical study of the mode I delamination toughness of Z-pinned laminates

Yan, Wenyi, Liu, H. and Mai, Y. 2003, Numerical study of the mode I delamination toughness of Z-pinned laminates, Composites science and technology, vol. 63, no. 10, pp. 1481-1493, doi: 10.1016/S0266-3538(03)00167-2.

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Title Numerical study of the mode I delamination toughness of Z-pinned laminates
Author(s) Yan, Wenyi
Liu, H.
Mai, Y.
Journal name Composites science and technology
Volume number 63
Issue number 10
Start page 1481
End page 1493
Publisher Pergamon
Place of publication London, England
Publication date 2003-08
ISSN 0266-3538
Keyword(s) B. fracture toughness
C. laminates
C. delamination
C. computational simulation
Z-pin reinforcement
Summary A finite element (FE) model is developed to investigate mode I delamination toughness of z-pin reinforced composite laminates. The z-pin pullout 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.
Notes Available online 4 June 2003.
Language eng
DOI 10.1016/S0266-3538(03)00167-2
Field of Research 091202 Composite and Hybrid Materials
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2003, Elsevier Science
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