Stitching effect on the mechanical properties of composite beams

Stitch된 복합재 빔의 기계적 물성변화

  • 이창훈 (한국기계연구원 복합재료 그룹) ;
  • 남원상 (한국기계연구원 복합재료 그룹) ;
  • 송승욱 (부경대학교 고분자공학과) ;
  • 변준형 (한국기계연구원 복합재료 그룹)
  • Published : 2004.10.01

Abstract

The stitching process has been widely utilized for the improvement of through-thickness property of the conventional laminated composites. This paper rep0l1s the effects of stitching on the flexural and interlaminar shear properties of multiaxial warp knitted composites in order to examine the performance 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 $0^{\circ}$ fibers showed the lowest flexural strength and modulus ($12\%$reduction for both properties). The stitch spacing of 5mm resulted 8% reduction in interlaminar strength compared with 10mm spacing.

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