Structural design and weaving of preformed fabric for manufacturing composite high-pressure cylinder for gases

In order to obtain a preformed fabric particular suitable to integrally moulding high-pressure cylinders and provide a new method for manufacturing this kind of composite material with low cost,this paper focused on the design method of the preformed fabric specially used for the composite high-pressure cylinder.Glass filament yarn was selected as warp and weft in weaving the preformed fabric,which can directly form the revolution shape of the cylinder by winding.The shape of the preform was obtained by spreading of cylinder body along its flank.The wefts in the preform were designed along the generator direction of the cylinder body and warps along the circumference direction,which made the fabric weavable.Two kinds of preform structures were analyzed,one is uneven weft density arrangement and another is sectional even weft density arrangement.It was found that although the preform with uneven weft density can be woven easily,the fabric structure is not uniform.In the preform with sectional even weft density,the wefts include long length wefts which interlace with all warp yarns and short length wefts which only interlace with the warp yarns in some sections.The fabric structural uniformity is affected by the kinds of short wefts,proportion of the long wefts and short wefts,as well as the distribution of the short wefts among the long ones.