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Stiffness changes in laminates caused by intralaminar cracks and shear deformation
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.ORCID iD: 0000-0003-1871-4020
1997 (English)In: Composites and functionally graded materials, American Society of Mechanical Engineers , 1997, p. 165-168Conference paper, Published paper (Refereed)
Abstract [en]

An experimental study has been conducted to study stiffness changes in laminates containing inclined (off-axis) plies. The class of laminates studied is glass-epoxy (0, ±θ4, 01/2)s with θ = 25, 40, 55 and 70. It is found that for 0>40 multiple cracks occur in the θ-plies while for θ<40 no cracks are found. However, for all θ angles the laminate moduli change. A continuum damage mechanics approach is used to calculate stiffness changes due to cracks. In the absence of cracks the shear modulus reduction in the θ-plies, determined from independent tests on a (±45)s laminate, is found to provide good prediction of the observed stiffness changes.

Place, publisher, year, edition, pages
American Society of Mechanical Engineers , 1997. p. 165-168
Series
Composites and functionally graded materials ; 80
National Category
Composite Science and Engineering
Research subject
Polymeric Composite Materials
Identifiers
URN: urn:nbn:se:ltu:diva-37949Local ID: c2790ee0-0213-11dc-ad0a-000ea68e967bOAI: oai:DiVA.org:ltu-37949DiVA, id: diva2:1011448
Conference
ASME International Mechanical Engineering Congress and Exposition : 16/11/1997 - 21/11/1997
Note
Godkänd; 1997; 20070514 (cira)Available from: 2016-10-03 Created: 2016-10-03 Last updated: 2018-01-16Bibliographically approved

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Varna, JanisTalreja, Ramesh

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