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Constitutive relationships for laminates with ply cracks in in-plane loading
Luleå tekniska universitet.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0001-9649-8621
2005 (English)In: International journal of damage mechanics, ISSN 1056-7895, E-ISSN 1530-7921, Vol. 14, no 3, p. 235-259Article in journal (Refereed) Published
Abstract [en]

A theoretical framework which allows determining the whole set of 2-D thermomechanical constants of a damaged laminate as a function of crack density in different layers is presented. In this approach, closed-form expressions, which contain thermoelastic ply properties, laminate layup, and crack density as the input information are obtained. It is shown that the crack opening displacement (COD) and crack face sliding displacement, normalized with respect to a load variable, are important parameters in these expressions influencing the level of the properties degradation. They are determined in this paper using generalized plain strain FEM analysis results for noninteractive cracks. The strong dependence of the COD on the relative stiffness and thickness of the surrounding layers, found in this study, is described by a power law. The methodology is validated and the possible error introduced by the noninteractive crack assumption is estimated by comparing with the 3-D FEM solution for a cross-ply laminate with two orthogonal systems of ply cracks. Experimental data and comparison with other models are used for further verification.

Place, publisher, year, edition, pages
2005. Vol. 14, no 3, p. 235-259
National Category
Composite Science and Engineering
Research subject
Polymeric Composite Materials
Identifiers
URN: urn:nbn:se:ltu:diva-6508DOI: 10.1177/1056789505050355ISI: 000230049400003Scopus ID: 2-s2.0-23344452749Local ID: 4bc381c0-a257-11db-8975-000ea68e967bOAI: oai:DiVA.org:ltu-6508DiVA, id: diva2:979393
Note
Validerad; 2005; 20070112 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Varna, Janis

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  • apa
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Output format
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