Paper published in a book (Scientific congresses and symposiums)
New Developments in Handling Stress Constraints in Optimal Material Distributions
Duysinx, Pierre; Sigmund, Ole
1998In Proceedings of 7th AIAA/USAF/NASA/ISSMO symposium on Multidisciplinary Design Optimization
Peer reviewed
 

Files


Full Text
DuySig98.pdf
Author postprint (216.43 kB)
Request a copy

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
Topology optimization; stress constraints; global constraints; singularity problem
Abstract :
[en] There is a general interest to consider stress constraints in topology optimization of continuum structures. By their very nature stress constraints are local constraints which result in large scale optimization problems that are often expensive to solve. Here in order to reduce the computing the effort we explore an alternative technique based on equivalent global (that is integrated) constraints. We define two global stress constraints based on the p-norm and p-mean of the epsilon-relaxed overall stress criteria in the finite elements. We present a new formulation of the epsilon-relaxation technique which is better suited to topology optimization of continuum structures and which makes the relaxation process automatic. The "p-mean" and "p-norm" functions bound by lower and upper value the maximum value of the epsilon-relaxed overall stress criterion. Based on numerical experiments this study compares the global and the local constraint formulations. Even if the use of integrated constraints leads a reduction of the computing time by one or two orders of magnitude, they definitely give a weaker control of local stress level. This sometimes can lead to solutions that are a bit different.
Disciplines :
Aerospace & aeronautics engineering
Mechanical engineering
Author, co-author :
Duysinx, Pierre  ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Ingénierie des véhicules terrestres
Sigmund, Ole
Language :
English
Title :
New Developments in Handling Stress Constraints in Optimal Material Distributions
Publication date :
1998
Event name :
7th AIAA/USAF/NASA/ISSMO symposium on Multidisciplinary Design Optimization
Event organizer :
AIAA /USAF /NASA/ISSMO
Event place :
Saint Louis, Missouri, USA, Septembre 2-4, 1998, United States
Event date :
Septembre 2-4, 1998
Audience :
International
Main work title :
Proceedings of 7th AIAA/USAF/NASA/ISSMO symposium on Multidisciplinary Design Optimization
Publisher :
AIAA
Edition :
AIAA Paper 98-4906
Peer reviewed :
Peer reviewed
Available on ORBi :
since 16 July 2009

Statistics


Number of views
606 (23 by ULiège)
Number of downloads
36 (7 by ULiège)

Scopus citations®
 
240
Scopus citations®
without self-citations
215

Bibliography


Similar publications



Contact ORBi