Journal of the Korean Society of Marine Environment & Safety (해양환경안전학회지)

The Korean Society of Marine Environment and safety (해양환경안전학회)
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Post-buckling Behaviour of Aluminium Alloys Rectangular Plate Considering the Initial Deflection Effect

초기 처짐 영향을 고려한 알루미늄 합금 사각형 판의 좌굴 후 거동

  • Oh, Young-Cheol (Dep. of Ocean System Engineering, Graduate School, MMU) ;
  • Kang, Byoung-Mo (Dep. of Ocean System Engineering, Graduate School, MMU) ;
  • Ko, Jae-Yong (Dep. of Naval Architecture & Ocean Engineering, College of Marine Technology, MMU)
  • 오영철 (목포해양대학교 대학원 해양시스템공학과) ;
  • 강병모 (목포해양대학교 대학원 해양시스템공학과) ;
  • 고재용 (목포해양대학교 해양공과대학 조선해양공학과)
  • Received : 2014.09.22
  • Accepted : 2014.12.26
  • Published : 2014.12.31
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Abstract

In this paper, It is performing to the elastic and elasto-plastic large deformation series analysis using a numerical method for the initial deflection effect of the aluminum alloy rectangular plate in the elasto-plastic loading area patch loading size. It is assumed a boundary condition to be a simply supported condition and consider the initial deflection amplitude, aspect ratio. It examined the critical elastic buckling load and post-buckling behaviour of aluminium alloy A6082-T6 rectangular plate. It used a commercial program for the elastic and elasto-plastic deformation series analysis. If the initial deflection amplitude is smaller, the in-plane rigidity with increasing to load is reduced from the start and occurs significantly more increasing the amplitude. More higher the aspect ratio, the initial yield strength is gradually decreased, and the plate thickness thicker and occurs larger than the thin walled plate a reduction ratio of the initial yield strength of the patch loading size as 0.5.

본 논문에서는 탄소성 영역 내 패치 로딩 크기에 따른 알루미늄 합금 사각형 판의 초기 처짐 영향을 수치해석방법으로 이용한 탄성 및 탄소성 대변형 시리즈 해석을 수행하였다. 주변 지지조건은 단순지지로 가정하고 초기 처짐 크기(w/t), 종횡비(a/b), 세장비(b/t)를 고려하여 알루미늄 합금 A6082-T6 사각형 판의 임계 탄성 좌굴하중과 좌굴 후 거동을 검토하였다. 탄성 및 탄소성 대변형 시리즈 해석은 상용프로그램을 사용하였다. 초기 처짐 크기가 작을 경우 하중증가와 함께 면내 강성이 처음부터 감소하며 크기가 커질수록 훨씬 두드러지게 발생한다. 종횡비가 커질수록 초기항복강도는 점차 감소하며 판 두께가 두꺼울수록 패치 로딩 크기(l/b) 0.5 이후 초기 항복강도 감소비율은 얇은 두께보다 더 크게 발생한다.

Keywords

References

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