Stress Minimization of Structures Based on Bidirectional Evolutionary Procedure
Publication: Journal of Structural Engineering
Volume 145, Issue 2
Abstract
This paper develops a method for dealing with the stress minimization of continuum structures based on the bidirectional evolutionary structural optimization (BESO) method. The modified p-norm approach has been used to assemble all the local stresses in one global function for saving computational cost. The BESO method has been extended for the p-norm stress minimization while the volume constraint has been satisfied for the specified value. For updating the discrete design variables, the elemental sensitivity numbers have been derived where the sensitivity filtering approach has been used. To validate the proposed method, numerical examples including the L-bracket, cantilever, and Eyebar beams are presented. Compared with the traditional stiffness optimization, the stress-based topology optimization developed in this paper significantly alleviates the maximum stress of the optimized design.
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Acknowledgments
The authors wish to acknowledge the support of the Australian Postgraduate Award Scholarship and the Australian Research Council (FT130101094).
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©2018 American Society of Civil Engineers.
History
Received: Dec 12, 2017
Accepted: Aug 15, 2018
Published online: Dec 10, 2018
Published in print: Feb 1, 2019
Discussion open until: May 10, 2019
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