Volume 15, Issue 7 (9-2015)                   Modares Mechanical Engineering 2015, 15(7): 80-88 | Back to browse issues page

‎ 20.1001.1.10275940.1394.15.7.46.4

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Shaterzadeh A R, Foroutan K. Post-buckling analysis of eccentrically stiffened FGM cylindrical shells under external pressure and elastic foundation. Modares Mechanical Engineering 2015; 15 (7) :80-88
URL: http://mme.modares.ac.ir/article-15-10013-en.html
Post-buckling analysis of eccentrically stiffened FGM cylindrical shells under external pressure and elastic foundation
Ali Reza Shaterzadeh * 1, Kamran Foroutan
1- university of shahrood
Abstract:   (6654 Views)
Careful and numerical analysis eccentrically stiffened shells in the industry is a major step forward in the design of these shells. In this paper, a careful analysis of post-buckling behavior of eccentrically stiffened FGM thin circular cylindrical shells is surrounded by an elastic foundation and external pressure is presented. The two parameter elastic foundation based on Winkler and Pasternak elastic model is assumed. Stringer and ring stiffeners are internal. Shell properties and eccentrically stiffened are FGM. Fundamental relations and equilibrium equations are derived based on the smeared stiffeners technique and the classical theory of shells and according to von- Karman nonlinear equations. The three-term approximation for the deflection shape, including the pre-buckling, linear buckling shape and nonlinear buckling shape was chosen that using the Galerkin method, the critical load and post-buckling pressure-deflection curves is calculated. The effects of different dimensional parameters, buckling modes, volume fraction index and number of stiffeners are investigated. Numerical results show that stiffeners and elastic foundation enhance the stability of the shells. Increasing the shell thickness, reducing the volume fraction index, raising the number of Stringer and ring stiffeners and applying foundation elastic, causes the critical buckling load is increased, too.
Keywords: FGM cylindrical shell, Nonlinear analysis, Stiffened cylindrical shell, Post-buckling
Full-Text [PDF 545 kb]   (6453 Downloads)    
Article Type: Research Article | Subject: Aerospace Structures
Received: 2015/02/17 | Accepted: 2015/04/21 | Published: 2015/05/24
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