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A didactic multiscale approach for drone modeling is proposed. Specifically,we investigate the drone structure at both macroscopic and microscopic scales,by making use of finite element and atomistic simulations, respectively. Thestructural analysis is performed with the aim to equip the drone with specificsensors and measuring instruments capable to detect the existence of volcanicash, SO2 , CO2 and other pollutants in the atmosphere after a vulcaniceruption. We show that, by modeling the tubular structure of the drone with asandwich constituted by a a polystyrene core, carbon fiber skins and epoxymatrix, a weight saving of 7 grams for each drone arm can be obtained, incomparison to the standard commercial drones, although a slight worsening ofthe mechanical performances is observed. In addition, the molecular structureof the polystyrene chains has been investigated by using atomistic MolecularDynamics simulations, providing further information on the local structure ofthe polymer chains. Additional improvements of the weight saving could beobtained by means of the the topological optimization techniques on the body ofthe drone and on the supports for landing.

Designing drones by combining finite element and atomistic simulations: a didactic approach