대한조선학회논문집 (Journal of the Society of Naval Architects of Korea)

  • 제57권4호
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  • Pages.182-190
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  • 2020
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  • 1225-1143(pISSN)
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  • 2287-7355(eISSN)
대한조선학회 (The Society of Naval Architects of Korea)
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보강판의 국부변형 손상과 잔류 강도의 실험연구

Experiments on the Denting Damage and Residual Strength of Stiffened Plates

  • 박상현 (울산대학교 조선해양공학부) ;
  • 신현경 (울산대학교 조선해양공학부) ;
  • 강응순 ((주)울산랩) ;
  • 조상래 (울산대학교 조선해양공학부) ;
  • 장용수 (해군 군수사령부 함정기술연구소) ;
  • 백남기 (해군 군수사령부 함정기술연구소) ;
  • 박동기 (해군 군수사령부 함정기술연구소)
  • Park, Sang-Hyun (School of Naval Architecture and Ocean Engineering, University of Ulsan) ;
  • Shin, Hyun Kyoung (School of Naval Architecture and Ocean Engineering, University of Ulsan) ;
  • Kang, Eungsoon (UlsanLab Inc.) ;
  • Cho, Sang-Rai (School of Naval Architecture and Ocean Engineering, University of Ulsan) ;
  • Jang, Yong-Su (Naval Technology Research Institute, Naval Logistics Command, Korean Navy) ;
  • Baek, Nam-Ki (Naval Technology Research Institute, Naval Logistics Command, Korean Navy) ;
  • Park, Dong-Ki (Naval Technology Research Institute, Naval Logistics Command, Korean Navy)
  • 투고 : 2020.03.26
  • 심사 : 2020.04.13
  • 발행 : 2020.08.20
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초록

This study reports a series of drop impact tests performed to generate denting damages on stiffened plates and their residual ultimate strength tests under axial compression. The models were fabricated of general structural steel, and each model has six longitudinal stiffeners and two transverse frames. Among six fabricated models, four were damaged, and two were left intact for reference. To investigate the effects of collision velocity and impact location on the extent of damage, the drop height and the impact location were changed in each impact test. After performing the collision tests, the ultimate axial compression tests were conducted to investigate the residual strengths of the damaged stiffened plates. Finite element analyses were also carried out using a commercial package Abaqus/Explicit. The material properties obtained from a quasi-static tensile tests were used, and the strain-rate sensitivity was considered. After importing the collision simulation results, the ultimate strength calculations were carried out and their results were compared with the test data for the validation of the finite element analysis method.

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참고문헌

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