Ricerc@Sapienza

In this paper, we study buckling of radially FGM circular plates. In a previous study, a fourth-order polynomial expressing the exact solution of a linear elastic problem was used as buckling mode shape. To generalise such investigation, in this contribution the buckling mode is postulated to take the shape of a fifth-order polynomial function of the radial coordinate. The flexural rigidity is consequently sought as a polynomial of suitable order, expressing the functional grading. New solutions in closed form are then obtained by a semi-inverse method.

Tailoring the morphology of macroporous structures remains one of the biggest challengesin material synthesis. Here, we present an innovative approach to fabricatecustommacroporous materials with pore size varying throughout the structure by up to an order of magnitudeusingon-demand reconfigurable microfluidics. We employavalve-based flow-focusing junction(vFF)in which the size of the orifice can be adjusted in real-time (within tens of milliseconds)to generate foams withon-linecontrolled bubble size.