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Hojas multiestables con patrones reescribibles para el cambio de forma
A S Meeussen1,2,3, M van Hecke4,5
1AMOLF, Amsterdam, the Netherlands. a.meeussen@gmail.com.
Nature
|September 21, 2023
Resumen
Los investigadores desarrollaron metahojas reescribibles que cambian de forma utilizando la multistabilidad mecánica. Estas hojas forman formas 3D estables y complejas después de la eliminación de estímulos, ofreciendo una activación borrada y repetible para diversas aplicaciones.
Área de la Ciencia:
- Ciencias de los materiales
- Ingeniería mecánica
- La física
Sus antecedentes:
- Las hojas planas pueden ser modeladas para deformarse en formas 3D complejas utilizando estímulos externos.
- Los métodos actuales carecen de selección de forma intrínseca, requieren un prepatrón y dan como resultado formas permanentes o inestables.
Objetivo del estudio:
- Introducir una nueva estrategia de transformación de la forma basada en la multistabilidad mecánica.
- Para superar las limitaciones de los métodos existentes, permitiendo transformaciones de forma estables, borrables y repetibles.
Principales métodos:
- Utilizó metahojas onduladas diseñadas para almacenar recuerdos de estímulos mecánicos en cicatrices autoestabilizadoras.
- Investigó la transición a formas curvas, rizadas y retorcidas agudamente seleccionadas al eliminar el estímulo.
Principales resultados:
- Se demostró que las cicatrices persistentes forzan el cambio de forma estable después de que se eliminen los estímulos externos.
- Demostró que estas formas estables se pueden borrar aplicando la fuerza adecuada, permitiendo patrones reescribibles.
- Lograr una activación repetida y robusta con la estrategia desarrollada.
Conclusiones:
- La multistabilidad mecánica ofrece una solución robusta para la transformación controlada y reversible de la forma en las láminas.
- La estrategia material-agnóstica y libre de escala tiene una amplia aplicabilidad desde dispositivos a microescala hasta estructuras arquitectónicas.
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