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A Laminate Parametrization Technique for Discrete Ply Angle Problems with Manufacturing Constraints

TitleA Laminate Parametrization Technique for Discrete Ply Angle Problems with Manufacturing Constraints
Publication TypeJournal Articles
Year of Publication2013
AuthorsKennedy, GJ, Martins, JRRA
JournalStructural and Multidisciplinary Optimization
Volume48
Pagination379-393
Abstract

In this paper we present a novel laminate parametrization technique for layered composite structures that accounts for problems in which the ply angles are limited to a discrete set. In the proposed technique, the classical laminate stiffnesses are expressed as a linear combination of the discrete options and design-variable weights. An exact l1 penalty function is employed to drive the designs towards discrete, 0-1 designs. The proposed tech- nique can be used as either an alternative or as an enhancement to SIMP-type methods, such as discrete material optimization (DMO). Unlike mixed-integer approaches, our laminate parametrization technique is well suited for gradient-based design optimization. The pro- posed laminate parametrization is demonstrated on compliance design of laminated plates and buckling design of a laminated stiffened panel. The results demonstrate that the approach is an effective alternative to DMO methods.

DOI10.1007/s00158-013-0906-9
Citation KeyKennedy2012d