Item


Damage occurrence at edges of non-crimp-fabric thin-ply laminates under off-axis uniaxial loading

Thin-ply based laminates are a promising development in composite materials and are expected in the near future to outperform conventional laminates in mechanical performance. A rational design with thin plies requires understanding the effect of ply thickness on each damage mechanism. This paper presents an experimental investigation into damage occurrence in a quasi-isotropic laminate made from thin-ply, bi-axial, Non-Crimp-Fabric (NCF), under different off-axis uniaxial loadings. The NCF layers are positioned through the laminate thickness creating two regions, namely THICK and THIN (with and without ply clustering). Then, the onset and progress of three damage mechanisms (transverse matrix cracking, matrix crack induced delamination and free-edge delamination) for both regions are analyzed by monitoring the specimen鈥檚 free-edge. The results show that the critical region where damage occurs is that with ply clustering (THICK), whereas delamination originating from matrix cracks or free edge effects are delayed or even suppressed in the THIN region

The authors would like to acknowledge Chomarat (Ardeche, France) and Prof. S.W. Tsai (Stanford University, USA) for providing the material, Aldila (Poway, California, USA) for the epoxy system pre-preg and VX Aerospace (Leesburg, Virginia, USA) for manufacturing the panel. The authors also acknowledge the support of the Spanish government through the Ministerio de Economia y Competitividad under the contracts DPI2012-34465 and MAT2012-37552-C03-03. The first author especially acknowledges the support of the Generalitat de Catalunya with the pre-doctoral Grant FI-DGR (2013FI-801062)

漏 Composites Science and Technology, 2014, vol. 98, p. 44-50

Elsevier

Author: Guillamet Busquets, Gerard
Turon Travesa, Albert
Costa i Balanzat, Josep
Renart Canalias, Jordi
Linde, Peter
Mayugo Maj贸, Joan Andreu
Date: 2014 June 27
Abstract: Thin-ply based laminates are a promising development in composite materials and are expected in the near future to outperform conventional laminates in mechanical performance. A rational design with thin plies requires understanding the effect of ply thickness on each damage mechanism. This paper presents an experimental investigation into damage occurrence in a quasi-isotropic laminate made from thin-ply, bi-axial, Non-Crimp-Fabric (NCF), under different off-axis uniaxial loadings. The NCF layers are positioned through the laminate thickness creating two regions, namely THICK and THIN (with and without ply clustering). Then, the onset and progress of three damage mechanisms (transverse matrix cracking, matrix crack induced delamination and free-edge delamination) for both regions are analyzed by monitoring the specimen鈥檚 free-edge. The results show that the critical region where damage occurs is that with ply clustering (THICK), whereas delamination originating from matrix cracks or free edge effects are delayed or even suppressed in the THIN region
The authors would like to acknowledge Chomarat (Ardeche, France) and Prof. S.W. Tsai (Stanford University, USA) for providing the material, Aldila (Poway, California, USA) for the epoxy system pre-preg and VX Aerospace (Leesburg, Virginia, USA) for manufacturing the panel. The authors also acknowledge the support of the Spanish government through the Ministerio de Economia y Competitividad under the contracts DPI2012-34465 and MAT2012-37552-C03-03. The first author especially acknowledges the support of the Generalitat de Catalunya with the pre-doctoral Grant FI-DGR (2013FI-801062)
Format: application/pdf
ISSN: 0266-3538
Document access: http://hdl.handle.net/10256/10904
Language: eng
Publisher: Elsevier
Collection: MINECO/PN 2013-2015/DPI2012-34465
MINECO/PN 2013-2015/MAT2012-37552-C03-03
AGAUR/2013FI-801062
Reproducci贸 digital del document publicat a: http://dx.doi.org/10.1016/j.compscitech.2014.04.014
Articles publicats (D-EMCI)
Is part of: 漏 Composites Science and Technology, 2014, vol. 98, p. 44-50
Rights: Tots els drets reservats
Subject: Materials compostos -- Deslaminatge
Composite materials -- Delamination
Materials laminats
Laminated materials
Assaigs de materials
Materials -- Testing
Title: Damage occurrence at edges of non-crimp-fabric thin-ply laminates under off-axis uniaxial loading
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

Subjects

Authors