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Topology optimization of mechanical and aerospace components subject to fatigue stress constraints
Duysinx, Pierre; Collet, Maxime; Bauduin, Simon et al.
201511th World Congress on Strucural and Multidisciplinary Optimization
 

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Keywords :
Topology optimization; Stress Constraints; Fatigue
Abstract :
[en] While topology optimization has been based mostly on compliance type formulations, industrial applications call for more elaborated formulations including several restrictions on the local displacements and the stress constraints in some critical zones. Topology optimization with stress constraints was initially considered in Duysinx & Bendsoe (1998). Later the stress constraint formulation was further extended to consider non equal stress constraints limits Bruggi & Duysinx (2012) and to improve the solution efficiency using different strategies such as global stress constraint formulations (Duysinx & Sigmund, 1998, Le et al. 2010). In the present work, the authors are investigating the formulations of stress constraint topology optimization to support the redesign of structural components that have to be fabricated using additive manufacturing. In this perspective, design problem requirements include tackling fatigue constraints during stress constrained topology optimization. The work investigates different formulations of fatigue resistance which could be appropriate in a topology approach. At first the classical approach of mechanical engineering based on SN curves and Goodman or Soderberg lines. The treatment of these fatigue restrictions can take advantage of former work developed for unequal stress constraints by considering mean and alternating components of the stress state. In a second step our research is now focussing on more complex situations (3D stress states) which require resorting to more advanced criteria. Dang Van fatigue theory (Dang Van, Griveau, Message, 1989) has been selected but calls for a more elaborated procedure that is currently validated. Topology optimized structural layouts predicted using classical stress criteria, Goodman and Dang Van theories are compared.
Disciplines :
Aerospace & aeronautics engineering
Mechanical engineering
Author, co-author :
Duysinx, Pierre  ;  Université de Liège > Département d'aérospatiale et mécanique > Ingénierie des véhicules terrestres
Collet, Maxime ;  Université de Liège > Département d'aérospatiale et mécanique > Ingénierie des véhicules terrestres
Bauduin, Simon ;  Université de Liège > Département d'aérospatiale et mécanique > Ingénierie des véhicules terrestres
Tromme, Emmanuel ;  Université de Liège > Département d'aérospatiale et mécanique > Ingénierie des véhicules terrestres
Noël, Lise ;  Université de Liège > Département d'aérospatiale et mécanique > Ingénierie des véhicules terrestres
Bruggi, Matteo
Language :
English
Title :
Topology optimization of mechanical and aerospace components subject to fatigue stress constraints
Alternative titles :
[fr] Optimisation topologique de composants aérospatiaux et mécaniques soummis à la fatigue
Publication date :
08 June 2015
Number of pages :
1
Event name :
11th World Congress on Strucural and Multidisciplinary Optimization
Event organizer :
University of Sydney
Event place :
Sydney, Australia
Event date :
7 au 12 juin 2015
Audience :
International
References of the abstract :
Proceedings du 11th World Congress on Strucural and Multidisciplinary Optmization
Funders :
Partimoine de L'Université de Liège
Available on ORBi :
since 07 July 2015

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