Journal
COMPOSITE STRUCTURES
Volume 201, Issue -, Pages 1004-1017Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2018.06.078
Keywords
Automated Fibre Placement; Defects; Fibre misalignment; Delamination
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Funding
- Rolls-Royce plc through the Composites University Technology Centre (UTC) at the University of Bristol (UK)
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Automated composite manufacturing processes such as Automated Tape Laying (ATL) and Automated Fibre Placement (AFP) are effective methods to produce high quality, lightweight parts. Typically, preimpregnated fibres or tapes are laid side-by-side onto a tooling surface to generate the composite preform. Although these two main technologies are widely used to produce large composite components, inconsistencies such as overlapping tapes or gaps between adjacent tapes may occur during the manufacturing. Within this study, the effect of gaps and overlaps, so-called defects, has been investigated experimentally. Tensile and compressive testing has been carried out on specimens with a quasi-isotropic, symmetric layup into which artificial defects in various defined formations were introduced. Of particular interest were the strength knockdown factors and changes in the failure mode.
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