Design optimization of multistable variable-stiffness laminates

AbstractExploiting the anisotropic nature of composite laminates is a driving factor to improve the design regime of multistable structures. The concept of laminate tailoring is being taken a step ahead by allowing variation in fiber angle orientation within the ply planform. Such composite laminates known as variable stiffness (VS) composites have been reported to provide significant improvements in performance over constant stiffness designs. The phenomenon of snapping from one stable state to another is of paramount importance for multistable structures to be used in morphing applications. VS laminates allow the designer to tailor structural response according to the requirements of the morphing mechanism. This work presents a parametric study to explore designs by exploiting the tailoring options in VS laminates, with the objective of requiring low snap-through and snap-back voltages but at the same time enabling high out-of-plane displacements with the effective and efficient use of microfiber compos...