Hydro-mechanical loading and compressibility of fibrous media for resin infusion processes
Identifieur interne : 000836 ( France/Analysis ); précédent : 000835; suivant : 000837Hydro-mechanical loading and compressibility of fibrous media for resin infusion processes
Auteurs : Pierre Ouagne [France] ; Joël Breard [France] ; Tariq Ouahbi [France] ; Abdelghani Saouab [France] ; C. H. Park [France]Source :
- International journal of material forming [ 1960-6206 ] ; 2010.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Aluminium.
English descriptors
- KwdEn :
Abstract
The modelling of composite manufacturing processes where hydro-mechanical coupling takes place depends on the validity of compressibility and permeability models. In this work, the computer code initially used to simulate the effect of coupled hydro-mechanical load on composite preform (Ouahbi et al. Composites Part A, 38:1646-1654, 2007) is integrated into an inverse method to predict the compaction behaviour of the reinforcements. An experimental device developed at Le Havre is used to apply hydro-mechanical loads to the preforms. Two ramps of stress are imposed to the preform and the thickness evolution is measured as a function of time. The speed of thickness reduction is not constant and varies in the range of 0.1 to 12 mm/min. The effect of compression speed upon the saturated fabrics is investigated. For a fixed fibre volume fraction, an increase in stress is observed in increasing compression speed. The experimental results are compared to the compressibility curves determined by an inverse method. The calculated curves correspond to the compressibility curves experimentally obtained with low compression speed (∼0.25 mm/min). As a consequence, this suggests that a low compression speed should be applied when investigating the compressibility behaviour of composite preform with a view of modelling resin infusion processes.
Affiliations:
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Pascal:10-0465752Le document en format XML
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<term>Impregnated material</term>
<term>Inverse problem</term>
<term>Low speed</term>
<term>Modeling</term>
<term>Permeability</term>
<term>Preform</term>
<term>Production process</term>
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<term>Toile</term>
<term>Fraction volumique</term>
<term>Basse vitesse</term>
<term>Modélisation</term>
<term>Problème inverse</term>
<term>Etude expérimentale</term>
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<front><div type="abstract" xml:lang="en">The modelling of composite manufacturing processes where hydro-mechanical coupling takes place depends on the validity of compressibility and permeability models. In this work, the computer code initially used to simulate the effect of coupled hydro-mechanical load on composite preform (Ouahbi et al. Composites Part A, 38:1646-1654, 2007) is integrated into an inverse method to predict the compaction behaviour of the reinforcements. An experimental device developed at Le Havre is used to apply hydro-mechanical loads to the preforms. Two ramps of stress are imposed to the preform and the thickness evolution is measured as a function of time. The speed of thickness reduction is not constant and varies in the range of 0.1 to 12 mm/min. The effect of compression speed upon the saturated fabrics is investigated. For a fixed fibre volume fraction, an increase in stress is observed in increasing compression speed. The experimental results are compared to the compressibility curves determined by an inverse method. The calculated curves correspond to the compressibility curves experimentally obtained with low compression speed (∼0.25 mm/min). As a consequence, this suggests that a low compression speed should be applied when investigating the compressibility behaviour of composite preform with a view of modelling resin infusion processes.</div>
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