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Formation of damage and its effects on non-crimp fabric reinforced composites loaded in tension
SICOMP AB, Swedish Institute of Composites.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0001-9649-8621
2004 (English)In: Composites Science And Technology, ISSN 0266-3538, E-ISSN 1879-1050, Vol. 64, no 5, p. 675-692Article in journal (Refereed) Published
Abstract [en]

Non-crimp fabric (NCF) composites, manufactured by resin infusion techniques are one of the most promising next generation composite materials. They offer large potential for application in primary structures as they give excellent performance at low production costs. However, before NCF composites will be efficiently used in design, detailed understanding of governing micro mechanisms must be accumulated and described by predictive models. In the present study, NCF cross-ply laminates have been tested in tension. Intralaminar cracks caused in the 90° fibre bundle layers and their effect on laminate mechanical properties have been monitored. Occurrence of ‘novel' type of cracks propagating in the load direction (longitudinal cracks) is explained by a thorough FE analysis using an Representative Volume Element (RVE) approach, revealing stress concentrations caused by 0° fibre bundle waviness. Effects of damage on mechanical properties are modelled using modified micro mechanical models developed for analysis of conventional laminated composites. The analysis reveals mechanical degradation to be ruled by the crack opening displacement (COD). However, unlike traditional composites, transverse cracks do not generally extend through the entire thickness of the 90° layer, but are rather contained in single fibre bundles, limiting the COD

Place, publisher, year, edition, pages
2004. Vol. 64, no 5, p. 675-692
National Category
Composite Science and Engineering
Research subject
Polymeric Composite Materials
Identifiers
URN: urn:nbn:se:ltu:diva-2557DOI: 10.1016/S0266-3538(03)00292-6ISI: 000220151800007Scopus ID: 2-s2.0-0742284994Local ID: 02d1b070-0e88-11dc-b9dd-000ea68e967bOAI: oai:DiVA.org:ltu-2557DiVA, id: diva2:975410
Note
Validerad; 2004; 20070530 (cira)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Mattsson, DavidAsp, LeifVarna, Janis

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