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Indexed by:会议论文

Date of Publication:2008-11-10

Included Journals:EI、CPCI-S、Scopus

Page Number:159-163

Key Words:Ultimate strength; corroded volume loss; pitting corrosion; assessment; buckling analysis; ship hull plate

Abstract:The goal of this report focuses on the development of an assessing method for ultimate strength of ship hull plate with corrosion damnification. It is confirmed that corrosion damnification on ship hull plate generally appears as pits with different shape, size and distributing density. According to a long term inspected results for pitting on ship hull plates, all the kinds of pits appearing on the hull plate would be equivalent to semi-spherical shape, conical shape and cylindrical shape. Pitting corrosion results in a quantity loss of the plate material as well as a significant degradation of the ultimate strength of the hull plate due to reducing of the effective thickness of the plate. Accordingly, the model for describing the correlations between the ultimate strength and the corroded volume loss of a corroded plate is firstly proposed based on relative theory. Such model was then completed through numerical experiment by nonlinear finite element analyses for series of corroded plate models, The corroded volume loss based ultimate strength assessing model is expected to be applicable to assessment of the ultimate strength of corroded plate in a ship hull structure.