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Structural Engineering and Mechanics Volume 75, Number 6, September25 2020 , pages 701-711 DOI: https://doi.org/10.12989/sem.2020.75.6.701 |
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Porosity effects on post-buckling behavior of geometrically imperfect metal foam doubly-curved shells with stiffeners |
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Seyed Sajad Mirjavadi, Masoud Forsat, Yahya Zakariya Yahya, Mohammad Reza Barati, Anirudh Narasimamurthy Jayasimha and AMS Hamouda
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| Abstract | ||
| This papers studies nonlinear stability and post-buckling behaviors of geometrically imperfect metal foam doubly-curved shells with eccentrically stiffeners resting on elastic foundation. Metal foam is considered as porous material with uniform and non-uniform models. The doubly-curved porous shell is subjected to in-plane compressive loads as well as a transverse pressure leading to post-critical stability in nonlinear regime. The nonlinear governing equations are analytically solved with the help of Airy stress function to obtain the post-buckling load-deflection curves of the geometrically imperfect metal foam doubly-curved shell. Obtained results indicate the significance of porosity distribution, geometrical imperfection, foundation factors, stiffeners and geometrical parameters on post-buckling characteristics of porous doubly-curved shells. | ||
| Key Words | ||
| post-buckling; shell theory; porous material; curved shell; nonlinear stability; stiffeners | ||
| Address | ||
| Seyed Sajad Mirjavadi, Masoud Forsat, AMS Hamouda: Department of Mechanical and Industrial Engineering, Qatar University, P.O. Box 2713, Doha, Qatar Yahya Zakariya Yahya: Auckland Bioengineering Institute, the University of Auckland, Auckland, New Zealand Mohammad Reza Barati: Fidar project Qaem Company, Darvazeh Dolat, Tehran, Iran Anirudh Narasimamurthy Jayasimha: Bonn-Rhein-Sieg University of Applied Science, Sankt Augustin, Germany | ||