Failure of Composite T-Joints in Bending with Through-the-Thickness Reinforcement: Stitching Vs Z-Pinning

H. Cui; Yu Long Li

doi:10.4028/www.scientific.net/KEM.525-526.233

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 525-526Failure of Composite T-Joints in Bending with...

Failure of Composite T-Joints in Bending with Through-the-Thickness Reinforcement: Stitching Vs Z-Pinning

Abstract:

The stitched composite T-joints and Z-pinned ones subject to bending load were investigated in this paper. A simple theoretical model characterizing the failure process of through the thickness reinforcement (TTR) during mode I delamination was presented. The experimental results showed that the initial damage load and maximum load of stitched specimens are higher than that of Z-pinned ones, while the energy absorption of stitched specimens during delamination is lower than that of Z-pinned ones. The energy absorption values predicted by the present model meet the experiments reasonably well. High friction force at the interface between TTR tow and matrix, with a long pull-out displacement of the tow, helps to improve the delamination resistance.

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Periodical:

Key Engineering Materials (Volumes 525-526)

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233-236

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https://doi.org/10.4028/www.scientific.net/KEM.525-526.233

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Online since:

November 2012

Authors:

H. Cui, Yu Long Li

Keywords:

Delamination, Fracture Toughness, Stitch, Z-PiN

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