期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 116, 期 7, 页码 2500-2505出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1816731116
关键词
superparamagnetism; molecular dynamics; finite element analysis; membranes; spontaneous symmetry breaking
资金
- Center for Bio-Inspired Energy Science, an Energy Frontier Research Center - US Department of Energy, Office of Science, Basic Energy Sciences [DE-SC0000989]
- Portuguese Foundation for Science and Technology [IF/00322/2015]
- Consejo Nacional de Ciencia y Tecnologia Grant Fondo Institucional de Fomento Regional para el Desarrollo Cientifico, Tecnologico y de Innovacion (FORDECYT) [265667]
Superparamagnetic nanoparticles incorporated into elastic media offer the possibility of creating actuators driven by external fields in a multitude of environments. Here, magnetoelastic membranes are studied through a combination of continuum mechanics and molecular dynamics simulations. We show how induced magnetic interactions affect the buckling and the configuration of magnetoelastic membranes in rapidly precessing magnetic fields. The field, in competition with the bending and stretching of the membrane, transmits forces and torques that drives the membrane to expand, contract, or twist. We identify critical field values that induce spontaneous symmetry breaking as well as field regimes where multiple membrane configurations may be observed. Our insights into buckling mechanisms provide the bases to develop soft, autonomous robotic systems that can be used at micro-and macroscopic length scales.
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