Journal of Advanced Research in Ocean Engineering

Korean Society of Ocean Engineers (한국해양공학회)
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Impact Bending Test Simulations of FH32 High-strength Steel for Arctic Marine Structures

  • Choung, Joonmo (Department of Naval Architecture and Ocean Engineering, Inha University) ;
  • Han, Donghwa (Department of Naval Architecture and Ocean Engineering, Inha University) ;
  • Noh, Myung-Hyun (Steel Solution Marketing Department, POSCO) ;
  • Lee, Jae-Yik (Department of Naval Architecture and Ocean Engineering, Inha University) ;
  • Shim, Sanghoon (Steel Solution Marketing Department, POSCO)
  • Received : 2015.11.01
  • Accepted : 2016.02.02
  • Published : 2016.03.31
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Abstract

This paper provides theoretical and experimental results to verify the crashworthiness of FH32 high-strength steel for arctic marine structures against ice impact. Assuming that side-shell structures of the Korean arctic research vessel, ARAON, with ice-notation PL10, collide with sheet ice, one-third-scale test specimens with a single transverse frame are manufactured. Impact-bending tests were conducted using a rigid steel striker that mimics sheet ice. Drop height was calculated by considering the speed at which sheet ice is rammed. Prior to impact-bending tests, tensile coupon tests were conducted at various temperatures. The impact-bending tests were carried out using test specimens fully fixed to the inside bottom frame of a cold chamber. The drop-weight velocity and test specimen deformation speed were measured using a high-speed camera and digital image correlation analysis (DICA). Numerical simulations were carried out under the same conditions as the impact-bending tests. The simulation results were in agreement with the test results, and strain rate was a key factor for the accuracy of numerical simulations.

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References

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