Article (Scientific journals)
Composite structures optimization using sequential convex programming
Bruyneel, Michaël; Fleury, Claude
2002In Advances in Engineering Software, 33 (7-10), p. 697-711
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Keywords :
Design of composite structures; Optimization; Convex approximations; sequential convex programming; structural optimization; dual method; composite structures; MMA family
Abstract :
[en] The design of composite structures is considered here. The approximation concepts approach is used to solve the optimization problem. The convex approximations of the MMA family are briefly described. Several modifications of these approximations are presented. They are now based on gradient information at two successive iterations, avoiding the use of the expensive second-order derivatives. A two-point fitting scheme is also described, where the function value at the preceding design point is used to improve the approximation. Numerical examples compare these new purely non-monotonous schemes to the existing ones for the selection of optimal fibers orientations in laminates. It is shown how these two-point based approximations are well adapted to the problem and can improve the optimization task, leading to reasonable computational efforts. A procedure is also derived for considering simultaneously monotonous and non-monotonous structural behaviors. The resulting generalized approximation scheme is well suited for the optimization of composite structures when both plies thickness and fibers orientations are considered as design variables. It is concluded that the newly developed approximation schemes of the MMA family are reliable for composite structures optimization. All the studied approximations are convex and separable: the optimization problem can then be solved using a dual approach. (C) 2002 Civil-Comp Ltd and Elsevier Science Ltd. All rights reserved.
Disciplines :
Materials science & engineering
Engineering, computing & technology: Multidisciplinary, general & others
Mechanical engineering
Computer science
Mathematics
Author, co-author :
Bruyneel, Michaël ;  Université de Liège > Département d'aérospatiale et mécanique > Modél. num. du comport. des struct. en matériaux composites
Fleury, Claude ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > LTAS - Optimisation multidisciplinaire
Language :
English
Title :
Composite structures optimization using sequential convex programming
Publication date :
2002
Journal title :
Advances in Engineering Software
ISSN :
0965-9978
eISSN :
1873-5339
Publisher :
Elsevier Science, Oxford, United Kingdom
Volume :
33
Issue :
7-10
Pages :
697-711
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 08 June 2011

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