Affiliation:
1. University of Illinois at Urbana-Champaign Department of Civil and Environmental Engineering, , Urbana, IL 61801
2. University of Illinois at Urbana-Champaign Department of Civil and Environmental Engineering, , Urbana, IL 61801 ;
3. University of Illinois at Urbana-Champaign Department of Mechanical Science and Engineering, National Center for Supercomputing Applications, , Urbana, IL 61801
Abstract
Abstract
Buckling, a phenomenon historically considered undesirable, has recently been harnessed to enable innovative functionalities in materials and structures. While approaches to achieve specific buckling behaviors are widely studied, tuning these behaviors in fabricated structures without altering their geometry remains a major challenge. Here, we introduce an inverse design approach to tune buckling behavior in magnetically active structures through the variation of applied magnetic stimuli. Our proposed magneto-mechanical topology optimization formulation not only generates the geometry and magnetization distribution of these structures but also informs how the external magnetic fields should be applied to control their buckling behaviors. By utilizing the proposed strategy, we discover magnetically active structures showcasing a broad spectrum of tunable buckling mechanisms, including programmable peak forces and buckling displacements, as well as controllable mechano- and magneto-induced bistability. Furthermore, we experimentally demonstrate that multiple unit designs can be assembled into architectures, resulting in tunable multistability and programmable buckling sequences under distinct applied magnetic fields. By employing a hybrid fabrication method, we manufacture and experimentally validate the generated designs and architectures, confirming their ability to exhibit precisely programmed and tunable buckling behaviors. This research contributes to the advancement of multifunctional materials and structures that harness buckling phenomena, unlocking transformative potential for various applications, including robotics, energy harvesting, and deployable and reconfigurable devices.
Funder
Defense Advanced Research Projects Agency
National Science Foundation
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics
Cited by
1 articles.
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