  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. The
structural analysis is performed with the aim to equip the drone with specific
sensors and measuring instruments capable to detect the existence of volcanic
ash, SO2 , CO2 and other pollutants in the atmosphere after a vulcanic
eruption. We show that, by modeling the tubular structure of the drone with a
sandwich constituted by a a polystyrene core, carbon fiber skins and epoxy
matrix, a weight saving of 7 grams for each drone arm can be obtained, in
comparison to the standard commercial drones, although a slight worsening of
the mechanical performances is observed. In addition, the molecular structure
of the polystyrene chains has been investigated by using atomistic Molecular
Dynamics simulations, providing further information on the local structure of
the polymer chains. Additional improvements of the weight saving could be
obtained by means of the the topological optimization techniques on the body of
the drone and on the supports for landing.
