Stacking sequence optimization and blending design of laminated composite structures
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The stacking sequence optimization problem for multi-region composite structures is studied in this work by considering both blending and design constraints. Starting from an initial stacking sequence design, unnecessary plies can be removed from this initial design and layer thicknesses of necessary plies are optimally determined. The existence of each ply is represented with discrete 0/1 variables and ply thicknesses are treated as continuous variables. A first-level approximate problem is constructed with branched multipoint approximate functions to replace the primal problem. To solve this approximate problem, genetic algorithm is firstly used to optimize discrete variables, and meanwhile, a blending design scheme is proposed to generate a blended structure. Starting from the thinnest region, this scheme shares all layers of current thinnest region with its adjacent regions. For non-shared layers in the adjacent regions, local mutation is implemented to add or delete plies to make them efficient designs. The whole process is repeated until the blending rule is satisfied. After that, a second-level approximate problem is built to optimize the continuous variables of ply thicknesses for retained layers. Those procedures are repeated until the optimal solution is obtained. Numerical applications, including a two-patch panel and a corrugated central cylinder in a satellite, are conducted to demonstrate the efficacy of the optimization strategy.
KeywordsStacking sequence optimization Blending design Multipoint approximation Composite structures
This research work is supported by the National Natural Science Foundation of China (Grant No. 11672016), which the authors gratefully acknowledge.
- An H, Chen S, Liu Y, Huang H (2016) Optimal design of the stacking sequences of a corrugated central cylinder in a satellite. Proc Inst Mech Eng Part L J Mater Des Appl published online. https://doi.org/10.1177/1464420716672097
- An H, Chen S, Huang H (2018a) Concurrent optimization of stacking sequence and stiffener layout of a composite stiffened panel. Eng Optim 1–19. https://doi.org/10.1080/0305215X.2018.1492570
- Van Campen JMJF, Seresta O, Abdalla MM, Gürdal Z (2008) General blending definitions for stacking sequence design of composite laminate structure. In: Proceedings of 49th AIAA/ASME/ASCE/AHS/ASC structures, structural dynamics, and materials conference, Schaumburg, IL, USA, April 7–10Google Scholar
- Venkataraman S, Haftka RT (1999) Optimization of composite panels-a review. In: Proceedings of the 14th annual technical conference of the American Society of Composites, Dayton, OH, September 27–29Google Scholar