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Topology optimization considering fatigue life in the frequency domain

Title
Topology optimization considering fatigue life in the frequency domain
Author
윤길호
Keywords
Topology optimization; Fatigue life; Narrow band solution; Wirsching and Light method; Ortiz and Chen method; Dirlik method
Issue Date
2015-10
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
COMPUTERS & MATHEMATICS WITH APPLICATIONS, v. 70, Page. 1852-1877
Abstract
This research develops a new topological optimization (TO) method to assess dynamic fatigue failure in the frequency domain for random excitation forces. Besides static failure, fatigue life (or fatigue failure) is an important design criterion for the safety of mechanical and building structures. Therefore, many assessment theories and computational approaches have been proposed, and they can be divided into two categories: time domain and frequency domain. Although both approaches have been successfully applied for engineering purposes, they are rarely considered in structural TO. To consider fatigue failure caused by stochastic mechanical loads in structural TO, this research adopts fatigue assessment approaches in the frequency domain, such as narrow band solution, the Wirsching and Light method, the Ortiz and Chen method, and Dirlik method. For TO, we perform an adjoint sensitivity analysis with those fatigue assessment methods. We consider some two-dimensional benchmark problems and show that the present design method successfully constrains fatigue. (C) 2015 Elsevier Ltd. All rights reserved.
URI
http://www.sciencedirect.com/science/article/pii/S0898122115003740?via%3Dihubhttp://hdl.handle.net/20.500.11754/28456
ISSN
0898-1221; 1873-7668
DOI
10.1016/j.camwa.2015.08.006
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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