Thermal Buckling Analysis of Porous Conical Shell on Elastic Foundation
Subject Areas : Mechanical EngineeringM Gheisari 1 , M.M Najafizadeh 2 , A. R Nezamabadi 3 , S Jafari 4 , P Yousefi 5
1 - Department of Mechanical Engineering, Islamic Azad University, Arak Branch, Arak, Iran
2 - Department of Mechanical Engineering, Islamic Azad University, Arak Branch, Arak, Iran
3 - Department of Mechanical Engineering, Islamic Azad University, Arak Branch, Arak, Iran
4 - Department of Mechanical Engineering, Islamic Azad University, Arak Branch, Arak, Iran
5 - Department of Mechanical Engineering, Islamic Azad University, Arak Branch, Arak, Iran
Keywords: Truncated conical shell, Thermal buckling, Porous,
Abstract :
In this research, the thermal buckling analysis of a truncated conical shell made of porous materials on elastic foundation is investigated. The equilibrium equations and the conical shell`s stability equations are obtained by using the Euler`s and the Trefftz equations .Properties of the materials used in the conical shell are considered as porous foam made of steel, which is characterized by its non-uniform distribution of porous materials along the thickness direction. Initially, the displacement field relation based on the classical model for double-curved shell is expressed in terms of the Donnell`s assumptions. Non-linear strain-displacement relations are obtained according to the von Kármán assumptions by applying the Green-Lagrange strain relationship. Then, performing the Euler equations leads obtaining nonlinear equilibrium equations of cylindrical shell. The stability equations of conical shell are obtained based on neighboring equilibrium benchmark (adjacent state). In order to solve the stability equations, primarily, due to the existence of axial symmetry, we consider the cone crust displacement as a sinusoidal geometry, and then, using the generalized differential quadrature method, we solve them to obtain the critical temperature values of the buckling Future. In order to validate the results, they compare with the results of other published articles. At the end of the experiment, various parameters such as dimensions, boundary conditions, cone angle, porosity parameter and elastic bed coefficients are investigated on the critical temperature of the buckling.
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