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相关概念视频

Unsymmetric Bending01:18

Unsymmetric Bending

756
Unsymmetrical bending occurs when the bending moment applied to a structural member does not align with its principal axis. This misalignment leads to complex stress distributions and deflection patterns that differ from those in symmetrical bending, and are essential for designing structures to withstand different loading conditions. In unsymmetrical bending, the neutral axis—where stress is zero—does not necessarily align with the geometric axes of the cross-section. The...
756
Mechanisms of Membrane-bending01:15

Mechanisms of Membrane-bending

3.2K
The living membranes are flexible due to their fluid mosaic nature; however, their bending into different shapes is an active process regulated by specific lipids and proteins. The membrane bending can be transient as seen in vesicles or stable for a long time as in microvilli. Cells regulate the size, location, and duration of the membrane curvature.
Membrane bending can happen due to intrinsic changes in lipid composition or extrinsic association with different proteins. The proteins involved...
3.2K

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相关实验视频

Updated: Jan 9, 2026

Origami Inspired Self-assembly of Patterned and Reconfigurable Particles
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Origami Inspired Self-assembly of Patterned and Reconfigurable Particles

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刚性-灵活的相互锁定的元结构使合规隐形成为可能.

Chengtao Sun1, Dawei Li1, Wenhe Liao1

  • 1School of Mechanical Engineering (SME), Nanjing University of Science and Technology (NJUST), 200 Xiao Ling Wei Road, Nanjing 210094, China.

Science advances
|December 3, 2025
PubMed
概括

研究人员开发了一种坚固,灵活的隐形皮肤,灵感来自链条. 这种电磁皮肤为航空航天应用提供超宽带吸收和显著的雷达减少.

科学领域:

  • 材料科学 材料科学 材料科学
  • 电磁学 电磁学 电磁学 电磁学
  • 航空航天工程 航空航天工程

背景情况:

  • 古老的连锁邮件激发了一种新的隐形皮肤架构.
  • 该设计将机械强度与电磁功能相结合.
  • 现有的材料往往会损害电磁性能的强度.

研究的目的:

  • 引入一个轻量级,可调整和承载载的隐形皮肤.
  • 为了证明超宽带电磁吸收和雷达截面减小.
  • 建立适应性,多功能表面的设计策略.

主要方法:

  • 使用拓互锁单元制造隐形皮肤.
  • 电磁吸收在广泛频率范围 (2-40 GHz) 的表征.
  • 测试机械弹性,包括损坏和曲疲劳.

主要成果:

  • 在2-40 GHz频段的96.3%范围内实现了90%以上的吸收率.
  • 对极化和入射角度表现出不敏感.
  • 在25%的单元损坏和10,000个曲周期后保持完整的功能.
  • 当应用于机翼时,无人机雷达截面减少了98%以上.

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Scalable Solution-processed Fabrication Strategy for High-performance, Flexible, Transparent Electrodes with Embedded Metal Mesh
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Design and Fabrication of an Elastomeric Unit for Soft Modular Robots in Minimally Invasive Surgery
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结论:

  • 链邮启发的隐形皮肤提供了卓越的机械和电磁性质.
  • 这种可适应的多功能表面适用于先进的航空航天和可穿戴技术.
  • 设计策略在具有挑战性的条件下实现了强大的电磁功能.