Three-dimensional fabrics are generally manufactured for composite applications. They could

be  produced  by  different  methods  such  as  weaving,  knitting  and  braiding.  Fundamental

aspects  underlying  the  weaving  of  3D  fabrics  are  discussed  and  their  differences,  as

compared with their 2D counter part, are highlighted. The shedding system for weaving 3D

fabrics differs from that of 2D weaving. Conversion of 2D into 3D fabrics has been possible

by means of computer-aided weaving on conventional looms in systematic stages. A true 3D

woven fabric is one in which the component yarns are placed in three mutually perpendicular

planes in relation to one another. Other types of 3D fabrics could deviate from this principle

such as those produced by the noobing technique. In the case of preforms used in advanced

composite materials, the integrity of the structure is considered to be the main criteria, as the

reinforcements  made  out  of  these  become  a  crucial  factor  in  deciding  the  mechanical

characteristics  of  the  composites.    Hence,  textile  reinforcements  have  found  varied

applications  in  composites  owing  to  their  adaptability,  which  enables  them  to  meet  a  wide

range of reinforcing requirements.

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Thu, 21/04/2011 - 02:03