Nonlinear mechanical,thermal and thermo-mechanical postbuckling of imperfect eccentrically stiffened thin FGM cylindrical panels on elastic foundations |
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| Affiliation: | 1. Vietnam National University, Hanoi, 144 Xuan Thuy-Cau Giay, Hanoi, Vietnam;2. The University of Melbourne, Parkville, VIC 3010, Australia;1. College of Information Science and Technology, Shanghai Ocean University, Shanghai 201306, China;2. Department of Architecture and Civil Engineering, City University of Hong Kong, Kowloon, Hong Kong Special Administrative Region;3. City University of Hong Kong Shenzhen Research Institute Building, Shenzhen Hi-Tech Industrial Park, Nanshan District, Shenzhen, China;4. Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843-3123, USA;1. Department of Mechanical Engineering, The University of British Columbia, Vancouver, BC, Canada;2. Departments of Mechanical Engineering and Civil Engineering, The University of British Columbia, Vancouver, BC, Canada |
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| Abstract: | This paper presents an analytical approach to investigate the nonlinear stability analysis of eccentrically stiffened thin FGM cylindrical panels on elastic foundations subjected to mechanical loads, thermal loads and the combination of these loads. The material properties are assumed to be temperature-dependent and graded in the thickness direction according to a simple power law distribution. Governing equations are derived basing on the classical shell theory incorporating von Karman–Donnell type nonlinearity, initial geometrical imperfection, the Lekhnitsky smeared stiffeners technique and Pasternak type elastic foundations. Explicit relations of load–deflection curves for FGM cylindrical panels are determined by applying stress function and Galerkin method. The effects of material and geometrical properties, imperfection, elastic foundations and stiffeners on the buckling and postbuckling of the FGM panels are discussed in detail. The obtained results are validated by comparing with those in the literature.. |
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| Keywords: | Nonlinear mechanical and thermal postbuckling Eccentrically stiffened FGM cylindrical panels Imperfection Elastic foundations |
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