Data di Pubblicazione:
2020
Citazione:
Automatic design of mechanical metamaterial actuators / S. Bonfanti, R. Guerra, F. Font Clos, D. Rayneau-Kirkhope, S. Zapperi. - In: NATURE COMMUNICATIONS. - ISSN 2041-1723. - 11:1(2020 Aug 20), pp. 4162.1-4162.10.
Abstract:
Mechanical metamaterial actuators achieve pre-determined input–output operations exploiting architectural features encoded within a single 3D printed element, thus removing the need for assembling different structural components. Despite the rapid progress in the field, there is still a need for efficient strategies to optimize metamaterial design for a variety of functions. We present a computational method for the automatic design of mechanical metamaterial actuators that combines a reinforced Monte Carlo method with discrete element simulations. 3D printing of selected mechanical metamaterial actuators shows that the machine-generated structures can reach high efficiency, exceeding human-designed structures. We also show that it is possible to design efficient actuators by training a deep neural network which is then able to predict the efficiency from the image of a structure and to identify its functional regions. The elementary actuators devised here can be combined to produce metamaterial machines of arbitrary complexity for countless engineering applications.
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
S. Bonfanti, R. Guerra, F. Font Clos, D. Rayneau-Kirkhope, S. Zapperi
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