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Effects of initial defects to the limit load of pressure cylinder shell

Wang Lin1,Li Feng1,Tian Jifeng2(1.School of Naval Architecture and Ocean Engineering,Jiangsu University of Science and Technology,Zhenjiang Jiangsu 212003,China)(2.School of Civil Engineering & Mechanics,Yanshan University,Qinhuangdao Hebei 066004,China)  
In order to research effects of factors such as initial defects,materials to the limit load of pressure cylinder shell,this paper built models in ANSYS to simulate the pressure cylinder shell.The effects of initial defects to the limit load of pressure cylinder shell were discussed when the amplitudes of the defects vary in some extent.Moreover,the FEM results were compared with the theoretic results,and the effects of materials to the limit loads were discussed.The initial defects will not change the buckling mode of pressure cylinder shell,and they have small effects to the limit load of the structure.However,the improvement of materials has notable effects.
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