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Members Made of Elastoplastic Material01:19

Members Made of Elastoplastic Material

538
The behavior of elastoplastic materials under bending stresses, particularly in structural members with rectangular cross-sections, is crucial for predicting material responses and understanding failure modes. Initially, when a bending moment is applied, the stress distribution across the section follows Hooke's Law and is linear and elastic. This distribution means the stress increases from the neutral axis to the maximum at the outer fibers, up to the elastic limit.
As the bending moment...
538

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多响应的4D打印软活性材料对形状可重新配置的执行器

Bhanendra Sahu1, Nishikanta Singh1, Sudipta Paul1

  • 1Department of Chemistry, Indian Institute of Technology Bhilai, Durg, Chhattisgarh, 491001, India.

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|August 29, 2025
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概括
此摘要是机器生成的。

这项研究引入了4D打印软活性材料 (SAM),具有可编程形状变化的双响应性. 在环境清理和软机器人方面有潜力.

关键词:
4D打印多响应式可重新配置的执行器软活性物质

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科学领域:

  • 材料科学
  • 聚合物化学
  • 机器人技术

背景情况:

  • 开发具有可编程形状转换和多功能性的4D打印软活性材料 (SAM) 是一个挑战.
  • 现有的SAM通常缺乏对形状变形和多刺激反应的精确控制.

研究的目的:

  • 设计和开发一个4D打印,双响应的SAM可调整的机械性能和精确的形状变形.
  • 探索该材料在环境修复和软机器人应用中的潜力.

主要方法:

  • 合成了一种四臂星聚N,N-二甲基胺) 块聚二甲基氨基乙烯酸) -Br (四臂星 (PDMA-b-PDMAEMA) 4-Br) 双块共聚物,并将其与酸 (AA) 集成.
  • 使用3D打印来制造复杂的3D架构,
  • 研究了热和pH响应,形状固定,形状恢复和染料去除能力.

主要成果:

  • 4D打印的SAM显示出出色的打印能力,高形状固定性和在44°C时的快速形状恢复.
  • 对于选择性去除染料的pH反应性胀 (pH10.5时≈96%的阴离子染料,pH4.5时≈65%的阴离子染料).
  • 一个基于SAM的机器人驱动器成功举起重量, 表明软机器人的潜力.

结论:

  • 开发的双响应SAM提供了精确的形状变化和多刺激响应.
  • 这种材料在可持续的环境技术,先进的安全系统,生物医学工程和智能执行器中具有很大的应用潜力.
  • 突出了SAM对4D打印自适应系统的多功能性.