Stacking sequence blending of multiple composite laminates using genetic algorithms

This paper presents a methodology for designing any two-dimensional array of laminated composite panels with varying loads such that continuity of some or all of the plies is maintained across adjacent panels. This design process is commonly referred to as blending and is beneficial in helping to minimize the manufacturing effort and cost of the panels while meeting structural requirements at minimum weight. The methodology discussed here involves an automated 2-step optimization process using a commercial genetic algorithm software code called DARWIN. The methodology is tested using a 3×3 array of sandwich panels, and an 18-panel group arranged in a horseshoe pattern. Results for each design problem are generated using ADOPTECHʹs Java-based composite laminate design software called OLGA, which utilizes the DARWIN optimization engine. A comparison between the individually optimized panels designs and the blended designs for each design problem is also presented.