Topology optimization considering fatigue life in the frequency domain

Jong Wook Lee, Gil Ho Yoon, Seung Hyun Jeong

Research output: Contribution to journalArticle

10 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)1852-1877
Number of pages26
JournalComputers and Mathematics with Applications
Volume70
Issue number8
DOIs
StatePublished - 2015 Oct 1

Fingerprint

Topology Optimization
Shape optimization
Fatigue Life
Topological Optimization
Fatigue
Frequency Domain
Fatigue of materials
Structural Optimization
Structural optimization
Topological Methods
Design Method
Sensitivity Analysis
Optimization Methods
Time Domain
Sensitivity analysis
Excitation
Safety
Benchmark
Engineering

Keywords

  • Dirlik method
  • Fatigue life
  • Narrow band solution
  • Ortiz and Chen method
  • Topology optimization
  • Wirsching and Light method

Cite this

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Topology optimization considering fatigue life in the frequency domain. / Lee, Jong Wook; Yoon, Gil Ho; Jeong, Seung Hyun.

In: Computers and Mathematics with Applications, Vol. 70, No. 8, 01.10.2015, p. 1852-1877.

Research output: Contribution to journalArticle

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