Author： Demboski G. Bogoeva-Gaceva G.
Publisher： Springer Publishing Company
ISSN： 0929-189X
Source： Applied Composite Materials, Vol.8, Iss.6, 2001-11, pp. : 371-384
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Abstract
The influence of preform stretching on mechanical properties of weft knitted PP/glass fibre composites was estimated. Stretching of Rib 1:1 weft knitted fabric was performed prior to consolidation in a wale or course direction and biaxially. Preform stretching increased tensile and bending strength of composite as a result of additional orientation of the reinforcing fibres in the stretching direction. Stretching in a wale direction was shown to be most effective due to the specific inherent structure of Rib 1:1 fabric. The impact toughness of composites was not significantly changed as a result of decreased preform elasticity in the direction of stretching.
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