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Tejidos estructurados con propiedades mecánicas ajustables

Yifan Wang1,2, Liuchi Li1, Douglas Hofmann3

  • 1Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA, USA.

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|August 12, 2021
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Resumen
Este resumen es generado por máquina.

Los investigadores desarrollaron tejidos sintonizables a partir de partículas tridimensionales que forman cadenas. La aplicación de una presión mínima aumenta dramáticamente la rigidez, ofreciendo soluciones de materiales adaptables.

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Área de la Ciencia:

  • Ciencias de los materiales
  • Ingeniería mecánica
  • La física

Sus antecedentes:

  • Las telas estructuradas obtienen sus propiedades de los materiales y de la geometría.
  • Por lo general, las propiedades de la tela se fijan después de la fabricación.
  • Las propiedades mecánicas ajustables son muy deseables para aplicaciones avanzadas.

Objetivo del estudio:

  • Para demostrar tejidos estructurados con módulo de flexión ajustable.
  • Para investigar el comportamiento de interferencia de las cadenas en capas bajo presión.
  • Explorar las aplicaciones de los tejidos adaptativos.

Principales métodos:

  • Fabricación de cadenas en capas a partir de partículas tridimensionales.
  • Aplicación experimental de presión externa para inducir el atascamiento.
  • Simulaciones de elementos discretos para modelar las propiedades de la microestructura y la macroescala.

Principales resultados:

  • Las cadenas de correos exhibieron un módulo de flexión ajustable.
  • Baja presión externa (aprox. 93 kPa) aumentó la rigidez en más de 25 veces.
  • Se observa la transición de fase de bloqueo, descrita por una función de ley de potencia.

Conclusiones:

  • Los tejidos estructurados con rigidez ajustable se pueden realizar utilizando partículas 3D entrelazadas.
  • Este mecanismo de bloqueo ofrece un nuevo enfoque a los materiales adaptables.
  • Las aplicaciones potenciales incluyen exoesqueletos portátiles, dispositivos hápticos y soportes médicos.