Paper number 329
|DAMAGE STRENGTH OPTIMIZATION OF LAMINATES BY A RELIABILITY-BASED METHOD|
F. Richard, D. Perreux
Laboratoire de Mécanique Appliquée R. Chaléat, UMR 6604 CNRS
24, rue de l'Epitaphe - 25000 Besançon - France
|Summary||This paper presents damage strength optimization of laminates using a reliability-based method. Two complementary analyses are developed: The first is a mechanical analysis of damage behavior using a thermodynamics framework which determines the failure criterion; the second is a reliability method which takes not only randomness, but also subjective uncertainties into account for failure probability calculation. This method, based on the First Order Reliability Method, requires the resolution of a constrained problem of optimization. To solve this problem, a hybrid algorithm, combining evolutionary computation techniques with deterministic procedure is presented. Filament-wound pipe optimization under pressure is discussed as a working example.
||Keywords|| composite laminates, optimization, damage, probabilistic method, design, evolutionary algorithm, failure, reliability.
Theme : Mechanical and Physical Properties
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