Int. J. Simul. Multidisci. Des. Optim.
Volume 4, Number 3-4, July 2010
|Page(s)||127 - 133|
|Published online||28 February 2012|
Investigation on Buckling of Orthotropic Circular and Annular Plates of Continuously Variable Thickness by Optimized Ritz Method
1 Islamic Azad University-Branch of Khomeinishahr, Mechanical Engineering Faculty, Boulvard Manzarie, Khomeinishahr, Isfahan, Iran
2 Iran Aircraft Manufacturing (HESA), Moallem Highway, Isfahan, Iran
a Corresponding author : email@example.com
Received: 10 May 2010
Accepted: 15 September 2010
This paper investigates symmetrical buckling of orthotropic circular and annular plates of continuous variable thickness. Uniform compression loading is applied at the plate outer boundary. Thickness varies linearly along radial direction. Inner edge is free, while outer edge has different boundary conditions: clamped, simply and elastically restraint against rotation. The optimized Ritz method is applied for buckling analysis. In this method, a polynomial function that is based on static deformation of orthotropic circular plates in bending is used. Also, by employing an exponential parameter in deformation function, eigenvalue is minimized in respect to this parameter. The obtained results show that in plate with identical thickness, increasing of outer radius decreases the buckling load factor.
Key words: Buckling / Orthotropic circular and annular plates / Optimized Ritz / Variable thickness.
© ASMDO, 2010
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