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相关概念视频

Deformation in a Circular Shaft01:10

Deformation in a Circular Shaft

299
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...
299
Stress Concentrations in Circular Shafts01:18

Stress Concentrations in Circular Shafts

184
Consider the elastic torsion formula, which applies to a circular shaft with a consistent cross-section. This formula assumes that the shaft's ends are loaded with rigid plates firmly attached. However, in many cases, torques are applied to the shaft through mechanisms like flange couplings or gears, which are connected by keys inserted into keyways. This application method modifies the stress distribution near the point of torque application, causing it to deviate from the distributions...
184
Residual Stresses in Circular Shafts01:10

Residual Stresses in Circular Shafts

179
In materials that exhibit elastic and plastic behavior, known as elastoplastic materials, residual stresses can accumulate when these materials experience plastic deformation. This deformation arises from either high levels of shearing stress or significant strains. Residual stresses are internal stresses that persist within a material after removing the external force causing deformation. This phenomenon is demonstrated when observing the behavior of a shaft under torque; notably, the...
179
Circular Shafts - Elastoplastic Materials01:24

Circular Shafts - Elastoplastic Materials

107
The study of solid circular shafts under stress shows that within the elastic limit, stress increases directly to the distance from the shaft's center. This relationship holds until the shaft reaches a critical point of stress, beyond which it begins to yield, marking the transition from elastic to plastic deformation. At this crucial juncture, the maximum torque the shaft can endure without permanent deformation is determined, signifying the limit of its elastic behavior.
As torque on the...
107
Circular Shaft - Stresses in Linear Range01:13

Circular Shaft - Stresses in Linear Range

251
Consider a scenario where a circular shaft is subject to torque that remains within the boundaries of Hooke's Law, avoiding any permanent deformation. So, the formula for shearing strain is revisited. This formula is multiplied by the modulus of rigidity, and then Hooke's Law for the shearing stress and strain is applied. As a result, the equation for shearing stress in a shaft can be derived.
251
Plastic Deformation in Circular Shafts01:20

Plastic Deformation in Circular Shafts

191
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...
191

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相关实验视频

Updated: Jul 11, 2025

Adjustable Stiffness, External Fixator for the Rat Femur Osteotomy and Segmental Bone Defect Models
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循环外部固定器的发展:一篇回顾

Kithmi N D Widanage1, Manura Jithmal De Silva2, Thilina Dulantha Lalitharatne3

  • 1Department of Engineering and Design, University of Sussex, Falmer, Brighton, BN1 9RH, United Kingdom; Department of Mechanical Engineering, University of Moratuwa, Moratuwa, 10400, Sri Lanka.

Injury
|November 11, 2023
PubMed
概括

本综述分析了用于骨科的圆形外置固定器 (CEF). 它强调了设计的进步,并确定了组装,监测和全球参与改善骨愈合的研究缺口.

关键词:
一个圆形的外部固定装置.圆形固定器的设计外部固定方式 外部固定方式伊利扎罗夫环固定器审查 审查 审查 审查泰勒空间框架的空间框架.

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A Reliable and Reproducible Critical-Sized Segmental Femoral Defect Model in Rats Stabilized with a Custom External Fixator
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A Reliable and Reproducible Critical-Sized Segmental Femoral Defect Model in Rats Stabilized with a Custom External Fixator

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An Efficient and Reproducible Protocol for Distraction Osteogenesis in a Rat Model Leading to a Functional Regenerated Femur
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An Efficient and Reproducible Protocol for Distraction Osteogenesis in a Rat Model Leading to a Functional Regenerated Femur

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相关实验视频

Last Updated: Jul 11, 2025

Adjustable Stiffness, External Fixator for the Rat Femur Osteotomy and Segmental Bone Defect Models
10:09

Adjustable Stiffness, External Fixator for the Rat Femur Osteotomy and Segmental Bone Defect Models

Published on: October 9, 2014

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A Reliable and Reproducible Critical-Sized Segmental Femoral Defect Model in Rats Stabilized with a Custom External Fixator
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A Reliable and Reproducible Critical-Sized Segmental Femoral Defect Model in Rats Stabilized with a Custom External Fixator

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An Efficient and Reproducible Protocol for Distraction Osteogenesis in a Rat Model Leading to a Functional Regenerated Femur
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An Efficient and Reproducible Protocol for Distraction Osteogenesis in a Rat Model Leading to a Functional Regenerated Femur

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科学领域:

  • 骨科生物力学 骨科生物力学
  • 生物材料工程是生物材料的工程.
  • 医疗器械设计 医疗器械设计

背景情况:

  • 圆形外部固定器 (CEF) 为骨愈合提供了卓越的刚性.
  • 通过CEF结构和组件设计实现最佳生物机械性能尚未完全理解.
  • 需要进行全面的审查,以巩固当前的知识,并确定未来的研究方向.

研究的目的:

  • 系统地审查圆形外部固定装置设计及其生物力学影响.
  • 确定CEF发展的趋势,研究缺口和未来方向.
  • 按照PRISMA的指导方针进行严格和透明的审查过程.

主要方法:

  • 在Scopus和PubMed上使用相关关键词进行系统的文献搜索.
  • 在谷歌专利数据库上进行专利搜索.
  • 对126个符合条件的记录进行了符合PRISMA标准的审查,包括文献识别分析.

主要成果:

  • 根据具体特征,总结和表格化了各种CEF设计.
  • 讨论了材料,自动化,调节方法,组件设计,电线紧和性能评估方面的发展.
  • 确定了重要的研究缺陷,包括易于组装,有效的电线紧和集成的患者监控系统.

结论:

  • CEF的设计已经取得了很大的进步,但关键领域需要进一步的研究,以加强临床应用.
  • 未来的研究应该专注于改进组装,开发强大的紧机制,并纳入实时监控.
  • 低收入和中等收入国家的研究投入增加对于全球CEF技术的进步至关重要.