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Master curve approach to axial stiffness calculation for non-crimp fabric biaxial composites with out-of-plane waviness
Luleå University.
RISE - Research Institutes of Sweden, Materials and Production, SICOMP.ORCID iD: 0000-0003-3755-6419
Ecole Européenne d'Ingénieurs en Génie des Matériaux.
Luleå University of Technology.
2014 (English)In: Composites Part B: Engineering, ISSN 1359-8368, E-ISSN 1879-1069, Vol. 64, p. 214-221Article in journal (Refereed) Published
Abstract [en]

The effect of 0°-tow out-of-plane waviness on the biaxial non-crimp-fabric (NCF) composite axial stiffness is investigated. Homogenizing, the bundle mesostructure of the NCF composite is replaced by layers. Then the composite is represented by a laminate with flat layers with effective stiffness properties representing the curved 0°-layer and the 90°-layer with varying thickness. It is shown that the NCF composite knock-down factor characterizing the stiffness degradation has almost the same dependence on wave parameters as the knock-down factor for the curved 0°-layer. Numerical analysis showed that 90°-layer knock-down factor versus amplitude curves for different wavelength can be reduced to one master curve which can be described by a one-parameter expression with the parameter dependent on the used material. This observation is used to obtain high accuracy for analytical predictions for knock-down factors for cases with different wavelength and amplitudes based on two FE calculations only. © 2014 Elsevier Inc. All rights reserved.

Place, publisher, year, edition, pages
Elsevier Ltd , 2014. Vol. 64, p. 214-221
Keywords [en]
A. Polymer-matrix composites (PMCs), A. Tow, B. Mechanical properties, C. Finite element analysis (FEA), C. Laminate mechanics
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:ri:diva-13146DOI: 10.1016/j.compositesb.2014.04.023OAI: oai:DiVA.org:ri-13146DiVA, id: diva2:973342
Available from: 2016-09-22 Created: 2016-09-22 Last updated: 2019-06-27Bibliographically approved

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Publisher's full texthttp://www.sciencedirect.com/science/article/pii/S1359836814001796

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Marklund, Erik

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