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Hydrostatic consolidation of commingled fibre composites
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Lightweight Structures.
2005 (English)In: Composites Science And Technology, ISSN 0266-3538, E-ISSN 1879-1050, Vol. 65, no 10, 1507-1519 p.Article in journal (Refereed) Published
Abstract [en]

A molten hybrid-yarn composite is modelled as a continuum. Constitutive equations governing hydrostatic consolidation are formulated, based on a two-phase continuum mechanical framework developed in a recent paper [Larsson R, Wysocki M, Toll S. Process-modelling of composites using two-phase porous media theory. European Journal of Mechanics-A 2004;23:15-36]. The fibre bundles are assumed to be completely surrounded by resin, thus subjected to hydrostatic pressure. To model the infiltration of resin into the fibre bundles, we introduce a compressible solid phase consisting of fibres plus intra-fibre void. The compression of the solid phase is caused by a combination of infiltration and elastic compression of the fibre bundles. The models are micromechanical, and all parameters have a clear physical meaning and are measurable in principle. Using parameter values out of the literature and estimated from micrographs, the number of adjustable parameters may be brought down to one: a spring constant for the fibre bundle elasticity. Consolidation experiments are performed, where a tool is closed to a prescribed compression and then held fixed, while the pressure is monitored over time. The predicted and measured pressure traces are in good agreement.

Place, publisher, year, edition, pages
2005. Vol. 65, no 10, 1507-1519 p.
Keyword [en]
B. Non-linear behaviour, C. Anelasticity, C. Computational simulation, Two-phase continuum, Compressibility of solids, Continuum mechanics, Elasticity, Hydrostatic pressure, Commingled fibre composites, Fibre bundle elasticity, Hydrostatic consolidation, Two-phase continuum mechanical framework, Composite materials, computational fluid dynamics, fiber reinforced composite, mathematical analysis
National Category
Applied Mechanics
URN: urn:nbn:se:kth:diva-80037DOI: 10.1016/j.compscitech.2005.01.002ISI: 000229824500005OAI: diva2:496051

QC 20120301

Available from: 2012-02-09 Created: 2012-02-09 Last updated: 2016-04-11Bibliographically approved

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