• Citer

MODELLING OF 3D WOVEN TEXTILE REINFORCED CEMENTCOMPOSITES RVES

par Toderascu, Christian ;Massart, Thierry,Jacques ;Tysmans, Tine
Référence 16th World Congress on Computational Mechanics and 4th Pan American Congress on Computational Mechanics(21/7/2024 - 26/7/2024: Vancouver, Canada)
Publication A Paraître, 2024-07-26

Abstract de conférence

• Accès en ligne
• Détails
• Contenu
• Statistiques

Résumé :

Textile reinforced cement composites (TRC) use fibre textiles instead of steel reinforcement. Doing so, thinner and more free-form concrete elements can be produced with higher resource efficiency. While 2D textiles are state of the art, the integration of transversal connections to create 3D textiles improves not only the manufacturing process but also the mechanical bending behaviour of TRC elements. 3D woven textiles have shown relevancy in the construction world due to the cross-sectional optimisation they allow. Models have to incorporate the 3D nature of the reinforcement to properly account for the interactions with the (cracking) cementitious matrix. 3D through thickness models with an explicit representation of the through thickness connections are indeed required for this purpose. Yet, no computational model for this type of material architecture has been proposed until now, partly due to the complexity of the woven reinforcement geometry. This contribution will develop a generation procedure to build the geometry of a mesoscale through thickness Representative Volume Element (RVE) model of a 3D woven reinforced TRC. This computational model will aim to assess the mechanical behaviour of the composite material under bending-type loading, determine the internal stress/strain fields, and analyse the interaction of the reinforcement with the cementitious matrix having degrading mechanical properties. To this end, an iterative geometry generation scheme is developed starting from concepts previously used for polymer-based composites. In particular, a geometrical tensioning procedure is applied to a simplified geometrical configuration of reinforcing yarns. This tensioning procedure is further combined with an interpenetration solving procedure to produce 3D woven textiles geometries. A discretisation finite element meshing procedure is subsequently used to create the RVE. It will be illustrated that this modelling procedure can be the basis of future developments and computational prediction for TRC materials with complex textile geometries. Based on RVE simulations under bending loadings using computational homogenisation procedures, the average (macroscopic) behaviour associated with the matrix degradation and the progressive transfer of stresses to the reinforcing textile will be assessed.