Influence of Embedded Gap and Overlap Fiber Placement Defects on Interlaminar Properties of High Performance Composites

Type Article
Date 2021-09
Language English
Author(s) Cartié Denis1, Lan Marine2, Davies PeterORCID3, Baley Christophe2
Affiliation(s) 1 : Coriolis Composites SAS, Rue Condorcet, Z.A. du Mourillon, 56350 Quéven, France
2 : IRDL, Université de Bretagne Sud, UMR CNRS 6027, Rue de Saint Maudé, 56000 Lorient, France
3 : Ifremer, Centre Bretagne, Technopôle Brest Iroise, 29280 Plouzané, France
Source Materials (1996-1944) (MDPI AG), 2021-09 , Vol. 14 , N. 18 , P. 5332 (18p.)
DOI 10.3390/ma14185332
WOS© Times Cited 5
Keyword(s) fiber placement, gap, overlap, interlaminar, delamination

Automated fiber placement (AFP), once limited to aerospace, is gaining acceptance and offers great potential for marine structures. This paper describes the influence of manufacturing defects, gaps, and overlaps, on the out-of-plane properties of carbon/epoxy composites manufactured by AFP. Apparent interlaminar shear strength measured by short beam shear tests was not affected by the presence of defects. However, the defects do affect delamination propagation. Under Mode I (tension) loading a small crack arrest effect is noted, resulting in higher apparent fracture energies, particularly for specimens manufactured using a caul plate. Under Mode II (in-plane shear) loading there is a more significant effect with increased fracture resistance, as stable propagation for specimens with small gaps changes to arrest with unstable propagation for larger gaps

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