Effect of graphene nanoparticles on the strength of sandwich structure inspired by dragonfly wings under low‐velocity impact
Mehdi Rezvani Tavakol, Mehdi Yarmohammad Tooski, Mohsen Jabbari, Mehrdad Javadi
Abstract
Abstract Dragonfly's wings are highly specialized flying organs that are well adapted to the flying behavior of each dragonfly, mainly consisting of veins and membrane. The effect of graphene nanoparticles on a novel foam‐based sandwich panel structure inspired by microstructural features of dragonfly wings has been investigated under low‐velocity impact. Composite and nanocomposite sandwich veins are made of E‐glass/epoxy layers, in which different percentages of graphene nanoparticles are combined with its resin. Polyurethane foam was also used for its core. According to the performance of the samples made after testing and cutting the samples in transverse and longitudinal directions, the internal structure of the vein was examined. Sandwich panels with this type of structure under impact can prevent damage propagation in the vein. The sandwich structure with 0.3% nano indicated more stable behavior in energy absorption and impact resistance than other samples.