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Stiffness prediction of damaged laminates based on the concept of laminate effective stiffness
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0001-9649-8621
Swerea SICOMP.
2016 (English)In: ECCM 2016: Proceeding of the 17th European Conference on Composite Materials, European Conference on Composite Materials , 2016Conference paper, Published paper (Refereed)
Abstract [en]

IThe concept of the effective stiffness of a unidirectional layer with intralaminar cracks is revisited performing 3-D FEM parametric analysis of symmetric and balanced laminates with damaged 90-layer. The effective stiffness of the damaged layer is obtained from the difference between damaged and undamaged laminate stiffness. The effective longitudinal modulus and Poisson's ratio of the layer are equal to their initial values. A very simple expression for the effective transverse modulus change with normalized crack density has sufficient accuracy and generality to be used in laminate theory to predict macroscopic elastic property change with crack density in laminates with very different lay-ups and made of different UD composites.

Place, publisher, year, edition, pages
European Conference on Composite Materials , 2016.
National Category
Composite Science and Engineering
Research subject
Polymeric Composite Materials
Identifiers
URN: urn:nbn:se:ltu:diva-63255Scopus ID: 2-s2.0-85017705516ISBN: 978-3-00-053387-7 (print)OAI: oai:DiVA.org:ltu-63255DiVA: diva2:1093242
Conference
17th European Conference on Composite Materials, Munich, Germany, 26-30th June 2016
Available from: 2017-05-05 Created: 2017-05-05 Last updated: 2017-06-29Bibliographically approved

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