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A comparative computational investigation on the effects of randomly distributed general corrosion on the post-buckling behaviour of uniaxially loaded plates

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Abstract

Post-buckling behaviour and ultimate strength of imperfect corroded steel plates used in ships and other related marine structures are investigated. Nonlinear elastic-plastic large deflection finite element analyses are performed on corroded steel plates. General corrosion wastage is considered to be distributed randomly on either one or both surfaces of the analyzed plates. The effects of general corrosion are introduced into the finite element models using a random thickness surface model. The effects of corroded plate parameters on the plate post-buckling and ultimate strengths are evaluated in detail. It was realized that the aspect ratio and thickness (slenderness) of the corroded plates affects their strength characteristics. Age of the plate models affects mainly their post-buckling-strength regimes and degrades their buckling/ultimate strength. Also, nonlinear post-buckling characteristics of the plates suffering either one-side or both-side random corrosion exhibit some differences. Finally, simple empirical formulations are proposed in order to give rough estimations of the ultimate strength of randomly corroded plates.

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Authors and Affiliations

  1. Faculty of Marine Technology, Amirkabir University of Technology, Tehran, 15914, Iran

    Mohammad Reza Khedmati, Zorareh Hadj Mohammad Esmaeil Nouri & Mohammad Mahdi Roshanali

Authors
  1. Mohammad Reza Khedmati
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  2. Zorareh Hadj Mohammad Esmaeil Nouri
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  3. Mohammad Mahdi Roshanali
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Correspondence to Mohammad Reza Khedmati.

Additional information

This paper was recommended for publication in revised form by Associate Editor Jin Weon Kim

Mohammad Reza Khedmati received his BSc in Civil Engineering from Amirkabir University of Technology, Iran in 1991, also his MSc in Naval Architecture from Technical University of Gdansk, Poland in 1993 and his Dr. Eng. in Structural Engineering from Hiroshima University, Japan in 2000. Dr. Khedmati is currently an Associate Professor of the Department of Maritime Engineering (previously Faculty of Marine Technology) of Amirkabir University of Technology, Iran. His research fields are buckling and ultimate strength analysis and behaviour of plated structures.

Zorareh Hadj Mohammad Esmaeil Nouri received his BSc, MSc, and Ph.D in Marine Technology Engineering from Amirkabir University of Technology, Iran in 2003, 2006 and 2011, respectively. Dr. Nouri is currently structural head of SADRA Company (a major marine EPC contactor in Iran). His research fields are ultimate strength and fatigue strength.

Mohammad Mahdi Roshanali received his BSc and MSc in Naval Architecture from Amirkabir University of Technology, Iran in 2007 and 2009 respectively. He is currently a senior structural Engineer at SADRA company (a major marine EPC contactor in Iran). His research fields are ultimate strength and fatigue strength.

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Khedmati, M.R., Nouri, Z.H.M.E. & Roshanali, M.M. A comparative computational investigation on the effects of randomly distributed general corrosion on the post-buckling behaviour of uniaxially loaded plates. J Mech Sci Technol 26, 767–783 (2012). https://doi.org/10.1007/s12206-011-1222-1

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  • DOI: https://doi.org/10.1007/s12206-011-1222-1

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