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Matrix Influence on the Impact Tolerance of Carbon Composites made of Non-crimp Fabric

Gilliot, Anatole (2010) Matrix Influence on the Impact Tolerance of Carbon Composites made of Non-crimp Fabric. Dissertation. DLR-Forschungsbericht. DLR-FB 2010-03, 140 S.

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Abstract

An efficient manufacturing solution for aircraft primary structures is the liquid resin injection/infusion (LRI) process with non-crimp fabric (NCF). Nevertheless, the main drawback of non-crimp fabric and liquid resin systems versus state of the art unidirectional prepreg tape (UDPT) is their poor tolerance to low velocity impact (compression strength after impact for the same indentation depth). The influence of the matrix properties (resin system and interlaminar toughening) on the impact tolerance of quasi-isotropic laminate manufactured with biaxial non-crimp fabric is studied. None of the liquid resin systems considered increased the impact tolerance of the NCF-Iaminate. The impact tolerance of UDPT could only be achieved by reducing the most critical impact failure mechanisms, delamination, thanks to an interlaminar toughening concept in the form of a veil positioned between each fibrous layer. The energy absorbed by the laminate during the impact could be qualitatively compared to an analytical estimation of the energy used for indentation and delamination.

Document Type:Monograph (DLR-Forschungsbericht, Dissertation)
Title:Matrix Influence on the Impact Tolerance of Carbon Composites made of Non-crimp Fabric
Authors:
AuthorsInstitution or Email of Authors
Gilliot, AnatoleUNSPECIFIED
Date:February 2010
Number of Pages:140
ISSN:1434-8454
Status:Published
Keywords:Carbon Fibre Reinforced Polymers (CFRP), Composite, Non-Crimp Fabric (NCF), Resin System, Impact Tolerance, Compression after Impact (CAI)
Institution: Otto-von-Guericke University, Magdeburg
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Structures & Materials
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems
Deposited By: Doris Ries
Deposited On:30 Jul 2010 11:09
Last Modified:30 Jul 2010 11:09

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