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Stiffness prediction of damaged laminates based on the concept of laminate effective stiffness
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- Varna, Janis (author)
- Luleå tekniska universitet,Materialvetenskap,Division of Materials Science, Luleå University of Technology, Sweden
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- Loukil, Mohamed (author)
- RISE,SICOMP,Swerea SICOMP, Box 271, Piteå, SE-94129, Sweden
- (creator_code:org_t)
- European Conference on Composite Materials, ECCM, 2016
- 2016
- English.
- In: ECCM 2016 - Proceeding of the 17th European Conference on Composite Materials. - : European Conference on Composite Materials, ECCM. - 9783000533877
- Conference paper (peer-reviewed)
Abstract
Subject headings
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- The 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.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Kompositmaterial och -teknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Composite Science and Engineering (hsv//eng)
Keyword
- Crack opening displacement
- Effective transverse modulus
- FEM
- Transverse cracking
- Composite materials
- Cracks
- Finite element method
- Laminated composites
- Stiffness
- Crack opening displacements
- Effective stiffness
- Longitudinal modulus
- Parametric -analysis
- Stiffness prediction
- Transverse modulus
- Unidirectional layers
- Laminates
- Polymeric Composite Materials
Publication and Content Type
- ref (subject category)
- kon (subject category)
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- Linköping University
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