Residual ultimate strength assessment of stiffened panels with locked cracks |
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| Affiliation: | 1. Hadal Science and Technology Research Center, Shanghai Ocean University, Shanghai 201306, China;2. Department of Naval Architecture and Ocean Engineering, Pusan National University, 30 Jangjeon-Dong, Geumjeong-Gu, Busan 609-735, Republic of Korea;3. Nonlinear Analysis and Applied Mathematics (NAAM) Research Group, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia;4. Department of Mathematics, Quaid-i-Azam University, 45320, Islamabad 44000, Pakistan;1. School of Naval Architecture and Ocean Engineering, Huazhong University of Science&Technology, Wuhan, China;2. Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration (CISSE), Wuhan, China;3. School of Transportation, Wuhan University of Technology, Wuhan, Hubei Province, China;1. Key Laboratory of High Performance Ship Technology of Ministry of Education, Wuhan University of Technology, Wuhan, 430063, Hubei, PR China;2. Departments of Naval Architecture, Ocean and Structural Engineering, School of Transportation, Wuhan University of Technology, Wuhan, 430063, Hubei, PR China;3. Marine Design and Research Institute of China, PR China |
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| Abstract: | The residual ultimate strength of stiffened panels with locked cracks under axial compressive loading is analyzed. The influences of various geometrical characteristics of cracks and panels, such as the length and the orientation angle of cracks, are investigated by the nonlinear finite element analysis. The cracks are prevented from further propagation by holes with a diameter of 2 mm drilled at their tips. The finite element model has two bays in the longitudinal direction, employing periodical symmetrical boundary conditions at the ends of the loading edge. Beam tension test results are used to define the true stress–strain relationship of the material, which is used in the FE analyses to account for the nonlinear material property of steel. |
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| Keywords: | Stiffened panel Residual strength Marine structures Cracks |
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