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Communication Dans Un Congrès Année : 2023

Saturated And Unsaturated Stokes-Darcy Fluid Flow Simulations Within 3d Interlock Fabrics With Capillary Effects

Résumé

Resin Transfer Moulding (RTM) is a process used in some composite parts manufacturing. A fibrous3D interlock preform is firstly compacted to achieve the desired Fibre Volume Fraction (FVF), and isthen impregnated with a polymer resin. Its flow within and between the homogeneous equivalent porousyarns has to be precisely understood to predict impregnation defects. The process setting is thereforemonitored accordingly to the 3D interlock fabric permeability, defined from Darcy’s law. A double-scale description is used to represent the fabric unit cells, taking into account both the mesoscopic yarnmorphology and the intra-yarn FVF field. This field is then converted into a permeability tensor fieldthat characterises the homogeneous equivalent intra-yarn properties. The unit cell has a multi-scalenature that leads consequently to multi-scale effects on the fluid flow. Darcy’s equation is used as amodel of the intra-tow flow and Stokes’ equation is used between yarns. Therefore double-scaleconcerns on the effective fabric unit cell permeability tensor and the potentially resulting dry spot map.However, an accurate description of the resin flow within the homogeneous equivalent porous yarns isrequired to achieve this. A locally oriented intra-yarn permeability tensor field varying along yarns anda capillary stress tensor within them at the resin-air interface are added to model stationary and transientdouble-scale flow in 3D interlock fabrics

Domaines

Matériaux
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Dates et versions

hal-04220250 , version 1 (27-09-2023)

Identifiants

  • HAL Id : hal-04220250 , version 1

Citer

M Cataldi, Yanneck Wielhorski, N Moulin, Augustin Parret-Fréaud, Monica Francesca Pucci, et al.. Saturated And Unsaturated Stokes-Darcy Fluid Flow Simulations Within 3d Interlock Fabrics With Capillary Effects. ICCM23 - 23rd International Conference on Composite Materials, Jul 2023, Belfast, United Kingdom. ⟨hal-04220250⟩
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