Mechanical test study on corroded marine high performance steel under cyclic loading |
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| Institution: | 1. School of Naval Architecture and Ocean Engineering, Dalian University of Technology, Liaoning, China;2. Dalian Maritime Safety Administration of the People''s Republic of China, Liaoning, China;3. School of Civil Engineering, Dalian University of Technology, Liaoning, China;4. State Key Laboratory of Structural Analysis for Industrial Equipment, Department of Engineering Mechanics, International Center for Computational Mechanics, Dalian University of Technology, Liaoning, China |
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| Abstract: | It is inevitable that marine structures suffer from corrosion and extreme cyclic loading. In order to study the influence of corrosion damage and cumulative fatigue damage on mechanical properties of marine steel, high performance steel NV-D36 was analyzed under electrochemical corrosion and cyclic loading. It was found that corrosion damage can reduce the elastic modulus, yield strength, ultimate stress and ultimate strain of steel NV-D36. And it was also found that cumulative fatigue damage will increase the ultimate stress of steel NV-D36 and reduce the ultimate strain of steel NV-D36. The effect of double damage on mechanical properties of steel NV-D36 was coupled with these two kinds of damage. The Chaboche model parameters calibrated under incremental cyclic loading scheme can exactly describe the stiffness and peak stress of steel NV-D36. |
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