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Degradation of elastic properties of non-uniformly damaged composite laminates
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0001-9649-8621
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
2013 (English)In: 7th EEIGM International Conference on Advanced Materials Research: 21–22 March 2013, LTU, Luleå, Sweden, IOP Publishing Ltd , 2013, article id 12009Conference paper, Published paper (Refereed)
Abstract [en]

Stiffness reduction model for laminates with non-uniformly distributed intralaminar cracks is presented and used to analyze the effect of non-uniformity and the accuracy of predictions based on uniform spacing. The values of the normalized crack opening displacement (COD) as affected by the presence of other cracks are used to calculate the axial modulus of cross-ply laminates with cracks. The COD is calculated using finite element method (FEM), considering two closest neighbors of the crack and using the smallest versus the average crack spacing ratio as non-uniformity parameter. Assuming uniform spacing the axial modulus reduction is overestimated. A "double-periodic" approach is presented to calculate the COD of a crack in a non-uniform case as the average of two solutions for periodic crack systems.

Place, publisher, year, edition, pages
IOP Publishing Ltd , 2013. article id 12009
Series
I O P Conference Series: Materials Science and Engineering, ISSN 1757-8981 ; 1
National Category
Composite Science and Engineering
Research subject
Polymeric Composite Materials
Identifiers
URN: urn:nbn:se:ltu:diva-32600DOI: 10.1088/1757-899X/48/1/012009Local ID: 724431a7-d43d-44a7-9b69-fa3963aaf438OAI: oai:DiVA.org:ltu-32600DiVA, id: diva2:1005834
Conference
EEIGM International Conference on Advanced materials research : 21/03/2013 - 22/03/2013
Note
Validerad; 2013; 20131218 (ysko)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved

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CiteExportLink to record
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Citation style
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Output format
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