STITCHING EFFECT ON FLEXURAL AND INTERLAMINAR PROPERTIES OF MWK TEXTILE COMPOSITES

摘要

The stitching process has been widely utilized for the improvement of through-thickness property of the conventional laminated composites. This paper reports the effects of stitching on the flexural and interlaminar shear properties of multi-axial warp knitted composites in order to identify the mechanical property improvements. Considered parameters are as follows: the stacking regularity of the multiaxial warp knits, the stitch spacings, the stitching types, the stitching location, and the location of compression fixture nose. These parameters have little effect on the flexural and interlaminar shear properties, except for the case of stitching location. Stitching on the 0° fibers showed the lowest flexural strength and modulus (12% reduction for both properties). The stitch spacing of 5mm resulted in 8% reduction for the case of interlaminar strength compared with that of 10mm spacing.