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相关概念视频

Linear time-invariant Systems01:23

Linear time-invariant Systems

920
A system is linear if it displays the characteristics of homogeneity and additivity, together termed the superposition property. This principle is fundamental in all linear systems. Linear time-invariant (LTI) systems include systems with linear elements and constant parameters.
The input-output behavior of an LTI system can be fully defined by its response to an impulsive excitation at its input. Once this impulse response is known, the system's reaction to any other input can be...
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Thermal Strain01:19

Thermal Strain

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Thermal strain is a concept that arises when we consider how temperature changes affect structures. Unlike the conventional assumption that structures remain constant under load, real-world scenarios often involve temperature fluctuations that can significantly impact these structures. Consider a homogeneous rod with a uniform cross-section resting freely on a flat horizontal surface. If the rod's temperature increases, the rod elongates. This elongation is proportional to the temperature...
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Shearing Strain01:20

Shearing Strain

1.4K
The shearing strain represents a cubic element's angular change when subjected to shearing stress. This type of stress can transform a cube into an oblique parallelepiped without influencing normal strains. The cubic element experiences a significant transformation when exposed solely to shearing stress. Its shape alters from a perfect cube into a rhomboid, clearly demonstrating the effect of shearing strain. The degree of this strain is considered positive if it reduces the angle between the...
1.4K
Measurements of Strain01:27

Measurements of Strain

2.6K
Strain quantifies the deformation of a material under force, typically measured as normal strain, which represents the change in length when compared with the original length. Electrical strain gauges are used for enhanced accuracy. These devices consist of a conductive wire mounted on a paper backing that adheres to the material's surface. These gauges operate on the piezoresistive effect, where the wire's electrical resistance changes in response to mechanical deformation. The strain...
2.6K
Strain Energy01:13

Strain Energy

988
Strain energy is a fundamental concept in the field of materials science and structural engineering, describing the energy absorbed by a material or structure when it is deformed under load.
Consider a rod that is fixed at one end and subjected to an axial force at the free end. This axial force induces stress within the rod, leading to its elongation. As the axial force increases, so does the elongation of the rod, illustrating a direct relationship between the force applied and the resulting...
988
Problem Solving on Stress and Strain01:22

Problem Solving on Stress and Strain

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Stress is a quantity that describes the magnitude of a force that causes deformation, generally defined as internal force per unit area. When forces pull on an object and cause its elongation, like the stretching of an elastic band, it is called tensile stress. When forces cause the compression of an object, it is known as compressive stress. When an object is being squeezed uniformly from all sides, like a submarine in the depths of the ocean, we call this kind of stress bulk stress (or volume...
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相关实验视频

Updated: Feb 2, 2026

A Fabrication Method for Highly Stretchable Conductors with Silver Nanowires
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紧张不变的通向拉伸式MXetronics公司

Shenglong Wang1,2,3, Weili Deng1, Haichao Huang1

  • 1Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, PR China.

Nature communications
|January 31, 2026
PubMed
概括
此摘要是机器生成的。

我们使用微电网工程开发了基于MXene的电器 (MXetronics),具有不变应变性,可以向任何方向伸展. 这一创新确保了在显著的机械应变下可靠的设备性能,用于先进的医疗监测.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 纳米技术纳米技术
  • 电子工程 电子工程

背景情况:

  • 碳化MXene片为基于MXene的电子产品 (MXetronics) 提供了出色的导电性.
  • 在MXenes中弱层间粘合导致膜破裂和机械应变下设备故障.
  • 现有的MXetronics在变形时遭受不稳定的操作和不准确的数据传输.

研究的目的:

  • 为了开发一种不变的,通向伸展的MXetronics (sos-MXetronics).
  • 为了克服基于MXene的设备的机械不稳定性的局限性.
  • 使可靠的电子系统能够在动态条件下进行医疗监测.

主要方法:

  • 使用了等级刚性微电网工程.
  • 模拟弹性纤维区域和模块缓冲互连被整合.
  • 制造了一种集NFC天线,微超级电容器和传感器的圆形设备.

主要成果:

  • sos-MXetronics表现出异常的应变不变性,保持了95-98%的性能,达到40%的应变.
  • 该系统显示,即使在显著的手腕变形时,也没有电气断开.
  • 实现了精确的血压监测,最大限度地减少了运动诱导的工件.

结论:

  • 层次刚性微电网工程有效地防止了可伸缩MXetronics的性能转移.
  • 开发的sos-MXetronics代表了实际MXene应用的重大进步.
  • 这项技术为可穿戴式医疗保健系统中可靠的基于二维材料的电子设备铺平了道路.