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Global and clustered approaches for stress constrained topology optimization and deactivation of design variables
Linköping University, Department of Management and Engineering, Mechanics. Linköping University, The Institute of Technology. Saab AB, Linköping, Sweden.
Linköping University, Department of Management and Engineering, Solid Mechanics. Linköping University, The Institute of Technology.
Linköping University, Department of Management and Engineering, Mechanics. Linköping University, The Institute of Technology.ORCID iD: 0000-0001-8460-0131
2013 (English)Conference paper, Published paper (Other academic)
Abstract [en]

We present a global (one constraint) version of the clustered approach previously developed for stress constraints, and also applied to fatigue constraints, in topology optimization. The global approach gives designs without large stress concentrations or geometric shapes that would cause stress singularities. For example, we solve the well known L-beam problem and obtain a radius at the internal corner.

The main reason for using a global stress constraint in topology optimization is to reduce the computational cost that a high number of constraints impose. In this paper we compare the computational cost and the results obtained using a global stress constraint versus using a number of clustered stress constraints.

We also present a method for deactivating those design variables that are not expected to change in the current iteration. The deactivation of design variables provides a considerable decrease of the computational cost and it is made in such a way that approximately the same final design is obtained as if all design variables are active.

Place, publisher, year, edition, pages
2013. 1-10 p.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-103201OAI: oai:DiVA.org:liu-103201DiVA: diva2:687733
Conference
10th World Congress on Structural and Multidisciplinary Optimization, May 19-24, 2013, Orlando, Florida, USA
Available from: 2014-01-15 Created: 2014-01-15 Last updated: 2017-05-15Bibliographically approved

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Global and clustered approaches for stress constrained topology optimization and deactivation of design variables(205 kB)731 downloads
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Holmberg, ErikTorstenfelt, BoKlarbring, Anders

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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf