Enhanced Optimization of Composite Laminates: Multi-Objective Genetic Algorithms with Improved Ply-Stacking Sequences

• Published in: Materials Vol. 17; no. 4; p. 887
• Main Authors: Kumpati, Ramesh, Skarka, Wojciech, Skarka, Michał, Brojan, Miha
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 15.02.2024
• Subjects: Algorithms; Book publishing; Composite materials; Composite structures; Design; Design engineering; Drone aircraft; Genetic algorithms; Guidelines; Laminated materials; Laminates; Layers; Load; Mechanical properties; Multiple objective analysis; Optimization; Ply stacking; Shear strength; Stacking sequence (composite materials); Unmanned aerial vehicles; United States; composite laminate; stacking sequence; buckling; failure criteria; optimization
• ISSN: 1996-1944; 1996-1944
• DOI: 10.3390/ma17040887

This study introduces multi-objective genetic algorithms for optimizing the stacking sequence of lightweight composite structures. Notably, significant emphasis is placed on adhering to engineering design guidelines specific to stacking sequence design. These guidelines are effectively integrated into the optimization problem formulation as either constraints or additional objectives. To enhance the initialization process, a novel strategy is proposed based on mechanical considerations. The method is then applied to optimize a composite laminate in terms of weight, inverse reserve factor, and buckling load factor. Three laminates were considered, and the influence of the design and the material composition on their mechanical properties were studied. This research demonstrated that a new stacking sequence [906/454/06] resulted in improved optimum designs compared to the traditional stacking sequence comprising plies at 0°, 45°, and 90° angles. These outcomes can be deemed the optimum stacking sequence, making them valuable for future applications in unmanned aerial vehicle (UAV) structures.