Reprogrammable mechanical metamaterials via passive and active magnetic interactions Articles uri icon

publication date

  • April 2025

International Standard Serial Number (ISSN)

  • 0935-9648

Electronic International Standard Serial Number (EISSN)

  • 1521-4095

abstract

  • This study experimentally demonstrates the reprogrammability of a rotating-squares-based mechanical metamaterial with an embedded array of permanent magnets. How the orientation, residual magnetization, and stiffness of the magnets influence both the static and dynamic responses of the metamaterial is systematically investigated. It is showed that by carefully tuning the magnet orientation within the metamaterial, notable tunability of the metamaterial response can be achieved across static and dynamic regimes. More complex magnetic node configurations can optimize specific structural responses by decoupling the tunability of quasi-static stress–strain behavior from energy absorption under impact loading. Additionally, reprogrammability can be further enhanced by an external magnetic field, which modulates magnetic interactions within the structure. This work paves the way for developing engineered structural components with adaptable mechanical responses, reprogrammable through either the redistribution of magnetic elements or the application of an external magnetic field.

subjects

  • Materials science and engineering
  • Mechanical Engineering

keywords

  • energy absorption; magneto-mechanics; metastructures; structural reprogrammability