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Steel and Composite Structures
  Volume 35, Number 4, May25 2020, pages 567-578

Post-buckling of higher-order stiffened metal foam curved shells with porosity distributions and geometrical imperfection
Seyed Sajad Mirjavadi, Masoud Forsat, Mohammad Reza Barati and A.M.S. Hamouda

    Based on third-order shear deformation shell theory, the present paper investigates post-buckling properties of eccentrically stiffened metal foam curved shells/panels having initial geometric imperfectness. Metal foam is considered as porous material with uniform and non-uniform models. The single-curve porous shell is subjected to in-plane compressive loads leading to post-critical stability in nonlinear regime. Via an analytical trend and employing Airy stress function, the nonlinear governing equations have been solved for calculating the post-buckling loads of stiffened geometrically imperfect metal foam curved shell. New findings display the emphasis of porosity distributions, geometrical imperfectness, foundation factors, stiffeners and geometrical parameters on post-buckling properties of porous curved shells/panels.
Key Words
    post-buckling; shell theory; porous material; curved shell; third-order theory
Seyed Sajad Mirjavadi, Masoud Forsat and A.M.S. Hamouda: Department of Mechanical and Industrial Engineering, Qatar University, P.O. Box 2713, Doha, Qatar
Mohammad Reza Barati: Fidar project Qaem Company, Darvazeh Dolat, Tehran, Iran

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