International Journal of Naval Architecture and Ocean Engineering

The Society of Naval Architects of Korea (대한조선학회)
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A parametric study on effects of pitting corrosion on stiffened panels' ultimate strength

  • Feng, Liang (College of Engineering, Ocean University of China) ;
  • Hu, Luocun (College of Engineering, Ocean University of China) ;
  • Chen, Xuguang (College of Engineering, Ocean University of China) ;
  • Shi, Hongda (College of Engineering, Ocean University of China)
  • Received : 2020.01.31
  • Accepted : 2020.08.01
  • Published : 2020.12.31
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Abstract

Pitting corrosion commonly shaped in hull structure due to marine corrosive environment seriously causes the deterioration of structural performance. This paper deals with the ultimate strength behaviors of stiffened ship panels damaged by the pits subjected to uniaxial compression. A series of no-linear finite element analyses are carried out for three stiffened panels using ABAQUS software. Influences of the investigated typical parameters of pit degree (DOP), depth, location and distribution on the ultimate strength strength are discussed in detail. It is found that the ultimate strength is significantly reduced with increasing the DOP and pit depth and severely affected by the distribution. In addition, the pits including their distributions on the web have a slight effect on the ultimate strength. Compared with regular distribution, random one on the panel result in a change of collapse mode. Finally, an empirical formula as a function of corrosion volume loss is proposed for predicting the ultimate strength of stiffened panel.

Keywords

Acknowledgement

The study is supported by the National Natural Science Foundation of China-Shandong Joint Fund (U1706223), the National Key Research and Development Program of China (2019YFD0901003). Shandong Province Major Science and Technology Special Projects (2017CXGC0106).

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