Influence of embedded gap and overlap fiber placement defects on the microstructure and shear and compression properties of carbon-epoxy laminates
|Author(s)||Lan Marine1, Cartie Denis2, Davies Peter3, Baley Christophe1|
|Affiliation(s)||1 : Univ South Brittany, LIMATB, Rue St Maude, F-56000 Lorient, France.
2 : Coriolis Composites SAS, Rue Condorcet, F-56350 Za Du Mourillon, Queven, France.
3 : IFREMER, Ctr Bretagne, Technopole Brest Iroise, F-29280 Plouzane, France.
|Source||Composites Part A-applied Science And Manufacturing (1359-835X) (Elsevier Sci Ltd), 2016-03 , Vol. 82 , P. 198-207|
|WOS© Times Cited||33|
|Keyword(s)||Structural composites, Defects, Mechanical properties, Mechanical testing|
|Abstract||This paper presents results from an experimental study of the influence of embedded defects created during automated fiber tape placement, on the mechanical properties of carbon/epoxy composites. Two stacking sequences have been examined, [(-45°/+45°)3/-45°] and [90°4/0°3/90°4], in which gaps and overlaps have been introduced during fiber placement. These materials have been cured in an autoclave either with or without a caul plate, then analyzed by ultrasonic C-scan. The microstructures were characterized by scanning electron microscopy. In-plane shear tests were performed on the ±45° laminates and showed that the use of a caul plate does not affect mechanical behavior of plies in the embedded defect region. Compression tests were performed on 0/90° laminates and in this case the presence of a caul plate is critical during polymerization as it prevents thickness variations and allows defects to heal.|