Journal of the Korean Society for Railway (한국철도학회논문집)

The Korean Society for Railway (한국철도학회)
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Structural Behavior Evaluation of Mg-GFRP Composite Single-Lap Bonded Joints With Different End Shapes

한 끝단 형상에 따른 마그네슘 합금과 유리섬유 복합소재 단일겹치기 본드 조인트 거동 분석

  • Kim, Jung-Seok (New Transportation Systems Research Center, Korea Railroad Research Institute) ;
  • Im, Jae-Young (New Transportation Systems Research Center, Korea Railroad Research Institute) ;
  • Lee, Woo-Geun (Railway System Engineering, University of Science & Technology)
  • Received : 2014.04.16
  • Accepted : 2014.09.29
  • Published : 2014.12.31
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Abstract

In this study, the strength of magnesium-GFRP/epoxy single-lap bonded joints are experimentally evaluated with different end shapes. In order to achieve this, four different single-lap joints with different end shapes are fabricated and the failure load is measured under tensile loading tests. From the test results, the single-lap joint with a square end exhibits the lowest failure load while the single-lap joint with reverse tapering and a spew fillet has the highest stress values. It has 11.1% higher failure strength than the single-lap joint with a square end.

본 연구에서는 마그네슘 합금과 유리섬유/에폭시 복합재로 구성된 단일겹치기 조인트의 접착부재의 끝단 형상에 따른 조인트의 구조거동을 시험적으로 평가하였다. 이를 위해 4가지 서로 다른 끝단부 형상을 갖는 마그네슘 합금-유리섬유/에폭시 복합재 단일겹치기 시편을 제작하였다. 또한, 인장 시험을 통해 각 단일겹치기 조인트의 파단 거동을 평가하였다. 시험결과 끝단형상이 직각인 형상을 갖는 조인트의 파단 강도가 가장 낮았다. 이에 반해, 접착부재가 역방향 테이퍼를 갖는 조인트의 접합강도가 가장 높았고, 이 값은 끝단 형상이 직각인 형상 대비 약 11.1% 증가된 접합강도이다.

Keywords

References

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