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NUMERICAL INVESTIGATION OF INFLUENCING PARAMETER OF IMPERFECTIONS ON thin SHORT CARBON STEEL cylindrical shell UNDER AXIAL COMPRESSION

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International Journal of Modeling, Simulation, and Scientific Computing 2013年第3期4卷 12-29页

作者： B.PRABU Department of Mechanical Engineering Pondicherry Engineering College Puducherry-605014 India

thin cylindrical shell structures have wide variety of applications due to their favorable stiffness-to-mass ratio and under axial compressive loading,these shell structures fail by their buckling ***,their load carrying capacity is decided by its buckling strength which in turn predominantly depends on the geometrical imperfections present on the shell *** main aim of the present study is to determine the more influential geometrical parameter out of two geometrical imperfection parameters namely,“the extent of imperfection present over a surface area”and its“amplitude”.To account for these geometrical parameters simultaneously,the imperfection pattern is assumed as a dent having the shape of extent of surface area as a nearly *** side length of extent of surface area can be considered as proportional to extent of imperfection present over an area and the dent depth can be considered as proportional to amplitude of *** the present numerical study,FE models of thin short carbon steel perfect cylindrical shells with different sizes of dent are generated at 1/3rd and half the height of cylindrical shells and analyzed using ANSYS nonlinear FE buckling analysis.

关键词： thin cylindrical shell buckling strength geometrical imperfections influencing parameter.

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Nonlinear Buckling Analysis of Pre-stressed Ring-Stiffened Circular cylindrical shells Under External Pressure

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Journal of Shanghai Jiaotong university(Science) 2016年第6期21卷 672-678页

作者：宁文波胥云廖映华 School of Mechanical Engineering Sichuan University of Science and Engineering

This paper is concerned with the nonlinear buckling behavior of pre-stressed ring-stiffened thin circular cylindrical shells under external *** to the geometrical nonlinearity,governing equations are derived by incorporating initial stresses based on Donnell-type shell *** "smeared stiffeners" approach is used for ring *** numerical analyses are conducted by Gelerkin's method to obtain critical buckling loads of *** study shows effects of initial stresses on stability of ***,effects of initial stresses on buckling modes of shells are discussed.

关键词： thin cylindrical shell ring-stiffener initial stress nonlinear stability

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