Structure property correlation is a critical textile research area explored by various researchers and many factors have been proposed over the years topredict/compare/design the woven fabrics. Cross-over firmness factor (CFF) and floating yarn factor (FYF) have been recently proposed as parameters tounderstand weave effect on fabric properties (Morino, H., Matsudaira, M. and Furutani, M. (2005). Predicting Mechanical Properties and Hand Values from theParameters of Weave Structures, Textile Research Journal, 75(3): 252—257). Redefined CFF and FYF factors using fabric fields in terms of interlacementindex (I) and float index (F), respectively have been proposed in this article. This new approach provides better understanding of the interlacements and floatsin the woven structure and further they are applied on multilayer interlocked fabrics to quantify the structural influence on the properties. Multilayer interlockedwoven fabrics with different interlacement patterns have been developed. Influence of fabric structure on preform properties relevant for resin transfer moldingcomposite manufacture, such as compression, permeability, and tensile behavior were studied with respect to the interlacement and float indices. Tensile andcompression tests were conducted on universal testing machine. Liquid permeability of these structures was evaluated based on horizontal wicking and contactangle wettability tests. Results show that influence of structural factor is greater on tensile and permeability properties than the compression properties of thesemultilayer fabrics
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