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Experimental and Nu...
Experimental and Numerical Studies of Initial Cracking in CFRP Cross-Ply Laminates
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- Okabe, T. (author)
- Department of Aerospace Engineering, Tohoku University
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- Imamura, H. (author)
- Department of Aerospace Engineering, Tohoku University
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- Sato, Y. (author)
- Department of Aerospace Engineering, Tohoku University
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- Higuchi, R. (author)
- Department of Aerospace Engineering, Tohoku University
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- Koyanagi, J. (author)
- Department of Materials Science and Technology, Tokyo University of Science
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- Talreja, Ramesh (author)
- Luleå tekniska universitet,Materialvetenskap
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(creator_code:org_t)
- Elsevier, 2015
- 2015
- English.
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In: Composites. Part A, Applied science and manufacturing. - : Elsevier. - 1359-835X .- 1878-5840. ; 68, s. 81-89
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- This work is concerned with the conditions for formation of the first (initial) cracks in composite laminates with cutouts or ply drop-offs subjected to in-plane loading. We study here the crack formation on the free edge of CFRP cross-ply laminates experimentally and by numerical stress and failure analysis. The free-edge surface strains are measured by the digital image correlation (DIC) technique. The numerical analysis consists of a two-scale approach, where the macro-level analysis is performed with a three-dimensional finite-element method (3D FEM) and the micro-level analysis uses a periodic unit-cell (PUC) in the transverse plies. The constitutive assumption made for the macro-level analysis is an orthotropic linear thermo-elastic solid for the unidirectional plies with a thin isotropic viscoplastic layer between the longitudinal and transverse plies. In the PUC, the fibers are assumed linear elastic, while the matrix is modeled as an elastic-viscoplastic solid. Crack formation is assumed to occur in the matrix by the dilatation induced brittle failure mechanism for which the dilatation energy density criterion is used.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Kompositmaterial och -teknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Composite Science and Engineering (hsv//eng)
Keyword
- Polymera konstruktionsmaterial
- Polymeric Composite Materials
Publication and Content Type
- ref (subject category)
- art (subject category)
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