Analyses of interaction mechanisms during forming of multilayer carbon woven fabrics for composite applications

Experimental, analytical and numerical investigation to prevent the tow buckling defect during fabric forming

“…Other defects mentioned by Potter et al [2] remain to be fully understood, such as, tow sliding/unweaving as experienced in [4,9,10] and studied in [11,12] or the tow buckling defect.…”

“…Some of these defects, such as the preform wrinkling, have been extensively investigated in the literature. Several experimental investigations [3][4][5] and numerical investigations [6][7][8] led to the understanding of the mechanics behind the formation of the wrinkling defect and the ways to prevent it (blank holders design, ply orientations, etc. ).…”

Experimental investigation of vegetal and synthetic fabrics cohesion in order to prevent the tow sliding defect via frictional and pull-out test

“…In that case, the higher the fabric-to-fabric friction is, the prompter the appearance of defects takes place. Nezami et al [29] explored several parameters on the preforming of woven reinforcements. The fabric-totool and fabric-to-fabric dynamic frictions were tested using a sliding test bench.…”

Numerical Modelling of the Mechanical Behaviour of Biaxial Weft-Knitted Fabrics on Different Length Scales

“…Other defects such as breakage, sliding, in-plane and out-out-plane buckling of yarns, and gap formation also have a great impact on the quality of the final component. At high blank holder forces, the friction between textile and forming tools and interlaminar friction between fabric layers induce local in-plane tensile forces into the textile [10]. The forming tool geometry and forming process parameters can be adapted in order to manipulate the magnitude, direction, and distribution of tensile force in order to suppress the forming defects or to reach a load path optimized fiber orientation [11].…”