Optimization of Circular Arches Under Multimodal Creep Buckling Constraints With Two Independent Design Functions

[+] Author and Article Information
Marek Rysz

General Engineering Department, University of Puerto Rico, Mayaguez PR 00680-5000

Adam Wroblewski

Cracow University of Technology, Krakow Poland

Appl. Mech. Rev 50(11S), S180-S183 (Nov 01, 1997) doi:10.1115/1.3101832 History: Online April 20, 2009


The paper deals with the optimal design of circular arches against creep buckling in Rabotnoov-Shesterikov sense. Fundamental buckling modes corresponding to two lowest critical loads both for out-of-plane and in-plane buckling of the arch are studied. Both depth and width of a rectangular cross-section are treated as independent control functions. The design variables are determined so as to minimize the total volume of an arch under given external load (radial pressure) and the critical time. The effect of the behavior of loading in the course of buckling on optimal shapes is analyzed. The problem is solved by the use of Pontriagin’s maximum principle.

Copyright © 1997 by American Society of Mechanical Engineers
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