Characterization of Deformations of Multiaxial Warp Knitted Fabrics during Forming Process

摘要

The typical structure(with four inserting yarn systems) of multi-axial warp knitted fabrics shows unsatisfactory conformability according to hemisphere pressing experi-ments.The structure containing only two bias inserting yarn systems(TBMWK fabric),however,proves to possess good conformability.This paper characterized in detail the forming behavior of TBMWK fabric.It was found that the two bias inserting yarn systems tend to gather always along the weft direction,and the angles between them along this direction are basically linear to the perpendicular distances from the measured points to the longitudinal axis of the hemisphere.And