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相关概念视频

Plastic Deformations01:19

Plastic Deformations

128
Plastic deformation represents a fundamental concept in materials science, which explains the irreversible change in the shape of a material when it experiences stress beyond its elastic capability. This phenomenon is important in structural engineering, especially in designing and analyzing cantilever beams—structures that are securely fixed at one end and bear loads at the opposite end. When these beams are subjected to loads within their elastic range, they will return to their...
128
Temperature Dependent Deformation01:12

Temperature Dependent Deformation

147
In a nonhomogeneous rod made up of steel and brass, restrained at both ends and subjected to a temperature change, several steps are involved in calculating the stress and compressive load. Due to the problem's static indeterminacy, one end support is disconnected, allowing the rod to experience the temperature change freely. Next, an unknown force is applied at the free end, triggering deformations in the rod's steel and brass portions. These deformations are then calculated and added...
147
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
Plasticity00:58

Plasticity

2.1K
Plasticity is the property where an object loses its elasticity and undergoes irreversible deformation, even after the deformation forces are eliminated. If a material deforms irreversibly without increasing stress or load, then this is called ideal plasticity. For example, when a force is applied to an aluminum rod, it changes its shape, but it does not return to its original shape once the force is removed. Plastic deformation or ductility is thus a permanent deformation or change in the...
2.1K
Plastic Behavior01:21

Plastic Behavior

196
A material's elastic behavior is characterized by the disappearance of stress once the load is removed, allowing the material to return to its original state. However, when stress surpasses the yield point, yielding commences, marking the onset of plastic deformation or permanent set. This change from elastic to plastic behavior is influenced by the peak stress value and the duration before the load is removed. An intriguing observation occurs when a specimen is loaded, unloaded, and...
196

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Updated: Jun 21, 2025

Design and Fabrication of an Elastomeric Unit for Soft Modular Robots in Minimally Invasive Surgery
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在改变对象变形性和任务属性时,人类操纵策略.

A Mazzeo1,2, M Uliano3,4, P Mucci3,4

  • 1The BioRobotics Institute, Scuola Superiore Sant'Anna, Pisa, Italy. angela.mazzeo@santannapisa.it.

Scientific reports
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概括
此摘要是机器生成的。

研究了对刚性和可变形物品的人类对象操纵策略. 调查结果显示,抓地点随着可变形性而变化,影响任务准确性和机器人控制.

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科学领域:

  • 机器人技术 机器人技术 机器人技术
  • 人与计算机的交互
  • 生物力学 生物力学

背景情况:

  • 机器人操纵研究往往忽视了人类对可变形物体的策略.
  • 了解人类操纵是开发先进机器人系统的关键.

研究的目的:

  • 研究不同可变形性的物体的人类抓取和插入策略.
  • 分析任务属性如何影响操作行为.
  • 为人类灵感的机器人控制算法的发展提供信息.

主要方法:

  • 参与者抓住并将刚性和可变形的物体插入不同尺寸和深度的洞中.
  • 分析包括抓取点选择,达到速度配置文件和任务完成时间.

主要成果:

  • 增加的物体变形性导致抓紧更接近插入点.
  • 抓取点选择涉及准确性和准确任务的重新抓取之间的权衡.
  • 对象合规性有助于对对象与洞对齐.
  • 达到速度的配置文件随着可变形性而变化,反映了任务精度的下降.

结论:

  • 人类操纵策略适应对象的变形性和任务限制.
  • 可以利用可变形物体的合规性来实现更容易的对齐.
  • 对人类策略的洞察力可以增强机器人操纵算法.