Stress Minimization of Structures Based on Bidirectional Evolutionary Procedure

Nabaki, K, Shen, J and Huang, X 2018, 'Stress Minimization of Structures Based on Bidirectional Evolutionary Procedure', Journal of Structural Engineering, vol. 145, no. 2, pp. 1-32.

Document type: Journal Article
Collection: Journal Articles

Title Stress Minimization of Structures Based on Bidirectional Evolutionary Procedure
Author(s) Nabaki, K
Shen, J
Huang, X
Year 2018
Journal name Journal of Structural Engineering
Volume number 145
Issue number 2
Start page 1
End page 32
Total pages 32
Publisher American Society of Civil Engineers
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.
Subject Structural Engineering
Keyword(s) Bi-directional evolutionary structural optimization (BESO)
stress minimization
P-norm stress
sensitivity filter
optimal design
DOI - identifier 10.1061/(ASCE)ST.1943-541X.0002264
Copyright notice © 2018 American Society of Civil Engineers
ISSN 1943-541X
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