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Constraint paths in non-linear structural optimization
KTH, School of Engineering Sciences (SCI), Mechanics, Structural Mechanics.ORCID iD: 0000-0002-5819-4544
2014 (English)In: Computers & structures, ISSN 0045-7949, E-ISSN 1879-2243, Vol. 140, 39-47 p.Article in journal (Refereed) Published
Abstract [en]

Optimization of significantly non-linear structures is a demanding task. The paper discusses how boundaries of the feasible region can be followed as generalized equilibrium paths in parametric space, reflecting engineering demands on stiffness, strains and stability. Solutions on the constraint paths are then evaluated with respect to any chosen objective function. For few design parameters, this approach is efficient and robust. This is demonstrated for a pre-stressed pressurized membrane of three parameters, showing several constraint paths for the problem, and indicating how these are used in optimization. The view is often closer to engineering design analyses than the mathematical optimization settings, which often has problems in handling stability constraints.

Place, publisher, year, edition, pages
2014. Vol. 140, 39-47 p.
Keyword [en]
Space membranes, Solution manifolds, Parameter dependence, Stability constraint, Hyper-elastic material
National Category
Applied Mechanics
URN: urn:nbn:se:kth:diva-148348DOI: 10.1016/j.compstruc.2014.05.003ISI: 000338403600004ScopusID: 2-s2.0-84901399069OAI: diva2:736529

QC 20140807

Available from: 2014-08-07 Created: 2014-08-05 Last updated: 2014-08-07Bibliographically approved

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