Failure Modes in Hybrid Titanium Composite Laminates

[+] Author and Article Information
Johannes Reiner

Department of Civil Engineering, University of British Columbia, Vancouver, British Columbia, Canada

Martin Veidt

School of Mechanical and Mining Engineering, The University of Queensland, Brisbane, Queensland, Australia

Matthew Dargusch

School of Mechanical and Mining Engineering, The University of Queensland, Brisbane, Queensland, Australia

1Corresponding author.

ASME doi:10.1115/1.4037273 History: Received January 27, 2017; Revised June 21, 2017


Hybrid Titanium Composite Laminates (HTCLs) combine the benefits of thin titanium sheets and Fibre Reinforced Polymer (FRP) composite laminates to design high performance light-weight materials with optimised impact resistance, fracture toughness, durability and/or thermal performance. This papers starts with a detailed review of typical failure modes observed in HTCLs. The critical manufacturing process of thin Grade II titanium sheets combined with HexPly G947/M18 carbon fibre-reinforced polymer laminates is described in detail. This includes the evaluation of titanium surface preparation techniques which guarantee good adhesive bonding. A systematic experimental study of different HTCL configurations under tensile loading confirms that the major failure modes are debonding between the titanium sheet and the FRP laminate, matrix cracking in the 90 ? plies of the FRP laminate and interlaminar delamination. The results show that HTCLs made from woven carbon fibre-reinforced polymer plies show higher ultimate strengths and strain at breaks than HTCLs containing a cross-ply composite core made from unidirectional pre-preg.

Copyright (c) 2017 by ASME
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