Article (Scientific journals)
Topology optimization for minimum weight with compliance and simpli ed nominal stress constraints for fatigue resistance
Collet, Maxime; Bruggi, Matteo; Duysinx, Pierre
2016In Structural and Multidisciplinary Optimization
Peer Reviewed verified by ORBi
 

Files


Full Text
SMOCBD.pdf
Author preprint (4.33 MB)
Download

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
topology optimization; fatigue constraints; stress constraints; singularity problem; Goodman criterion
Abstract :
[en] This work investigates a simpli ed approach to cope with the optimization of preliminary design of structures under local fatigue constraints along with a global enforcement on the overall compliance. The problem aims at the minimization of the weight of linear elastic structures under given loads and boundary conditions. The expected sti ness of the optimal structure is provided by the global constraint, whereas a set of local stress-based constraints ask for a structure to be fatigue resistant. A modi ed Goodman fatigue strength comparison is implemented through the same formalism to address pressure-dépendent failure in materials as in Drucker-Prager strength criterion. As a simplification, the Sines approach is used to de ne the equivalent mean and alternating stresses to address the fatigue resistance for an infinite life time. Sines computation is based on the equivalent mean and alternate stress depending on the invariants of the stress tensor and itsdeviatoric part, respectively. The so-called singularity phenomenon is overcome by the implementation of a suitable qp-relaxation of the equivalent stress measures. Numerical examples are presented to illustrate the features of the achieved optimal layouts and of the proposed algorithm.
Disciplines :
Mechanical engineering
Author, co-author :
Collet, Maxime ;  Université de Liège > Département d'aérospatiale et mécanique > Ingénierie des véhicules terrestres
Bruggi, Matteo
Duysinx, Pierre  ;  Université de Liège > Département d'aérospatiale et mécanique > Ingénierie des véhicules terrestres
Language :
English
Title :
Topology optimization for minimum weight with compliance and simpli ed nominal stress constraints for fatigue resistance
Publication date :
July 2016
Journal title :
Structural and Multidisciplinary Optimization
ISSN :
1615-147X
eISSN :
1615-1488
Publisher :
Springer, Berlin-Heidelberg, Germany
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
FRIA - Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture [BE]
Available on ORBi :
since 27 July 2016

Statistics


Number of views
93 (21 by ULiège)
Number of downloads
633 (28 by ULiège)

Scopus citations®
 
62
Scopus citations®
without self-citations
59
OpenCitations
 
40

Bibliography


Similar publications



Contact ORBi