Compaction behaviour of tow at meso-scale: experimental investigations of morphological evolution at dry, lubricated and saturated states

13th International Conference on Textile Composites

Hemmer, J.^1,2 ; Dharmalingam, A. Sakkalatty^1 ; Lectez, A.-S.^1,3 ; Burtin, C.^1 ; Comas-Cardona, S.^1 ; Binetruy, C.^1 ; Savart, T.^2

Institut de Recherche en Génie Civil et Mécanique (GeM), Ecole Centrale de Nantes, France^1

Plateforme CANOE, France^2

Centre National d'Etudes Spatiales (CNES), France^3

关键词: Experimental investigations;    Experimental methodology;    Fibrous microstructure;    Infusion process;    Mechanical solicitations;    Mesoscopic scale;    Morphological evolution;    Non-crimp fabrics;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/406/1/012020/pdf
DOI  :  10.1088/1757-899X/406/1/012020

来源: IOP

【 摘 要 】

Tows, partially constrained (tows within textile architecture) or free (single tows) exhibit movements and deformations, due to the various mechanical solicitations applied during manufacturing. During weaving or stitching, single dry tows undergo local compaction due to interlacing or stitch, leading to the evolution of the tows cross-section while processing. Once the woven or non-crimp fabrics are produced, they are impregnated by a fluid: when considering the infusion process, the filling step leads to a global compressive unloading at macro-scale that modifies, in a saturated state, tows cross-section and tows spatial distribution within the fabric. These evolutions of the fibrous microstructure at mesoscopic scale impact both the mechanical properties and the permeability. Thus, this work proposes two novel experimental methodologies to quantify the morphological evolution of tows under compaction at dry, lubricated and saturated states.