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相关概念视频

Plastic Deformation in Circular Shafts01:20

Plastic Deformation in Circular Shafts

184
When materials are subjected to forces that surpass their yield strength, they undergo a process known as plastic deformation. This results in a permanent alteration or strain in their structure. This concept can be specifically applied to circular shafts, where the deformation leads to a change in its shape. The precise evaluation of this plastic deformation requires understanding the stress distribution within the circular shaft, which is achieved by calculating the maximum shearing stress in...
184
Virtual Work for a System of Connected Rigid Bodies01:06

Virtual Work for a System of Connected Rigid Bodies

378
Virtual work is a powerful method used to solve problems involving several connected rigid bodies. When the system is in equilibrium, virtual work is zero. This allows the calculation of the resulting forces when a system undergoes a virtual displacement. When attempting to analyze such a system, first, use a free-body diagram, where an independent coordinate represents the configuration of the links, and mark its deflected position resulting from the positive virtual displacement.
Next,...
378
Plastic Deformations of Members with a Single Plane of Symmetry01:21

Plastic Deformations of Members with a Single Plane of Symmetry

87
When a structural member undergoes plastic deformation due to bending, it is crucial to understand the position of the neutral axis and the stress distribution. This member, characterized by a single plane of symmetry, exhibits a uniform stress distribution, with negative stress above the neutral axis and positive stress below. Notably, the neutral axis does not align with the centroid of the cross-section. This misalignment is typical in cases where the cross-section is not rectangular or...
87
Deformation in a Circular Shaft01:10

Deformation in a Circular Shaft

276
One of the distinctive characteristics of circular shafts is their ability to maintain their cross-sectional integrity under torsion. In other words, each cross-section continues to exist as a flat, unaltered entity, simply rotating like a solid, rigid slab. To understand the distribution of shearing stress within such a shaft, consider a cylindrical section inside this circular shaft. This section has a length of L and a radius of R, with one end fixed. The radius of the cylindrical section is...
276
One-Degree-of-Freedom System01:24

One-Degree-of-Freedom System

479
In mechanical engineering, one-degree-of-freedom systems form the basis of a wide range of electrical and mechanical components. Using these models, engineers can predict the behavior of various parts in a larger system, which gives them insight into how different forces interact with each other.
A one-degree-of-freedom system is defined by an independent variable that determines its state and behavior. One example of a one-degree-of-freedom system is a simple harmonic oscillator, such as a...
479
Deformation of Member under Multiple Loadings01:11

Deformation of Member under Multiple Loadings

163
When a rod is made of different materials or has various cross-sections, it must be divided into parts that meet the necessary conditions for determining the deformation. These parts are each characterized by their internal force, cross-sectional area, length, and modulus of elasticity. These parameters are then used to compute the deformation of the entire rod.
In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...
163

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规模启发的可编程机器人结构与同时的形状变形和刚度变化.

Tianyu Chen1, Xudong Yang1, Bojian Zhang1

  • 1School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore.

Science robotics
|July 17, 2024
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概括
此摘要是机器生成的。

研究人员为软机器人开发了一种新的规模启发的分层结构 (SAILS). 这种结构使得在紧的设计中可以同时改变形状和变硬度,克服了当前软机器人系统的局限性.

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科学领域:

  • 机器人技术 机器人技术 机器人技术
  • 材料科学 材料科学 材料科学
  • 生物灵感是一种生物灵感.

背景情况:

  • 生物体表现出复杂的多功能性,如形状变形和刚度变化.
  • 当前软机器人通常需要单独的模块来执行各种功能,从而导致重的设计和复杂的控制.
  • 灵感来自自然结构,如松鼠和鱼,为集成的机器人功能提供了潜力.

研究的目的:

  • 开发一种机器人结构,能够同时进行形状变形和刚度变化.
  • 创建一个高度集成和紧的机器人身体,以自然尺度为灵感.
  • 克服当前软机器人系统在复杂性和尺寸方面的局限性.

主要方法:

  • 使用反向设计的可编程表面图案开发了一种以尺度为灵感的分层结构 (SAILS).
  • 制造的帆船本质上是柔软和灵活的.
  • 在弹性外内利用负限制压力来诱导形状转变和刚度变化.

主要成果:

  • 在一个紧的结构中,SAILS展示了同时的形状变形和刚度变化.
  • 在软和硬状态之间,明显曲模量发生了53倍的变化.
  • 以高达5赫兹的调动频率工作.
  • 开发了多功能应用,包括两适应软机器人和可调节的无人机着陆系统.

结论:

  • 以规模为灵感的分层结构 (SAILS) 为软机器人中集成的多功能提供了一种新的方法.
  • 帆提供了一个紧而高效的解决方案,用于机器人需要适应性刚性和形状.
  • 这项技术在两机器人,自适应系统和无人机技术中具有潜在的应用.