Graphite/Epoxy 스트링거의 크리플링 실험

Crippling Test of Graphite/Epoxy Stringers

  • 최상민 (경상대학교 대학원 기계공학과) ;
  • 권진회 (경상대학교 수송기계공학부)
  • 발행 : 2000.11.01

초록

In author's previous paper, a finite element algorithm was presented to calculate the buckling and crippling stresses of composite laminated stringers. In this study, for the validation of the finite element analysis, Z-section composite stringers of different lengths and flange-widths were tested in axial compression. The stacking sequence of graphite/epoxy is [$\pm$45/0/90]s. Strain gages were attached to each specimen to get the strain response. Deflection and end-shortening were obtained by a displacement transducer. The buckling and crippling loads are determined from the strain response, load vs. end-shortening curves, and load vs. out-of-plane deflection curves. Comparison between finite element and experimental results shows good agreement in the buckling, local buckling, and crippling stresses.

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