Multi-objective optimization of weight and strength of laminated composites using gap-less and overlap-less variable thickness fiber placement

A variable-thickness carbon fiber placement technique was developed by adding new functions to the existing automated placement. In this study we propose a multi-objective optimization method achieve high strength and low weight for using Christensen fracture criterion mean curvature (or weight) as objective functions, orientation thickness distribution of prepreg tape design variables. The applied open-hole tension (OHT) problem. results showed that there is tradeoff between curvature: higher curvature, gain. addition, optimized layers OHT plates reduced up 52.6% compared with corresponding linear constant laminated improved strength.