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Deformations in a Symmetric Member in Bending01:18

Deformations in a Symmetric Member in Bending

166
When analyzing the deformation of a symmetric prismatic member subjected to bending by equal and opposite couples, it becomes clear that as the member bends, the originally straight lines on its wider faces curve into circular arcs, with a constant radius centered at a point known as Point C. This phenomenon helps to understand the stress and strain distribution within the member more clearly.
When the member is segmented into tiny cubic elements, it is observed that the primary stress...
166
Three-Dimensional Analysis of Strain01:29

Three-Dimensional Analysis of Strain

215
Three-dimensional strain analysis is crucial for understanding how materials deform under stress, particularly in elastic, homogeneous materials. This method employs principal stress axes to simplify complex stress states into more understandable forms. Subjected to stress, a small cubic element within a material either expands or contracts along these axes, transforming into a rectangular parallelepiped. This transformation effectively illustrates the material's deformation. The principal...
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相关实验视频

Updated: Jun 28, 2025

Dissection, MicroCT Scanning and Morphometric Analyses of the Baculum
04:32

Dissection, MicroCT Scanning and Morphometric Analyses of the Baculum

Published on: March 19, 2017

7.5K

捕捉宫脊椎形状:角测量与几何形态测量方法对比.

Einat Kedar1,2, David Ezra3, Ruth Pelleg-Kallevag1,2,4

  • 1Department of Anatomy and Anthropology, Faculty of Medical & Health Sciences, Tel Aviv University, Tel Aviv, Israel.

Clinical anatomy (New York, N.Y.)
|April 24, 2024
PubMed
概括
此摘要是机器生成的。

椎脊柱形状的分类因测量方法而异,其中主病是最常见的. 子的形状取决于年龄,但不取决于性别,并受到斜臂平衡的影响.

关键词:
解剖学变异的变化宫脊柱的角度是什么宫脊椎的形状 宫脊椎的形状宫脊椎形状分类的分类脊柱曲的情况

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相关实验视频

Last Updated: Jun 28, 2025

Dissection, MicroCT Scanning and Morphometric Analyses of the Baculum
04:32

Dissection, MicroCT Scanning and Morphometric Analyses of the Baculum

Published on: March 19, 2017

7.5K
Precision Measurements and Parametric Models of Vertebral Endplates
00:10

Precision Measurements and Parametric Models of Vertebral Endplates

Published on: September 17, 2019

6.5K
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科学领域:

  • 整形外科 整形外科 整形外科
  • 放射学 放射学是一门学科.
  • 生物机械分析分析

背景情况:

  • 宫脊椎形状表现出显著的变化.
  • 评估椎脊柱曲率的传统方法缺乏与实际形状的验证.
  • 在使用传统的角度测量来分类椎脊柱形状时存在差异.

研究的目的:

  • 用传统的角度测量与基于二维地标的几何形态测量方法比较宫脊椎的形状分类.
  • 为了研究椎脊柱形状与人口因素,头部位置和脊柱斜腰平衡之间的关联.

主要方法:

  • 分析了163个宫脊椎的CT扫描.
  • 使用C2-C7科布角 (CA),后触角 (PTA) 和2D几何形态测量来评估椎脊柱形状.
  • 测量了头部位置 (FMCA) 和斜臂平衡 (T1SA).

主要成果:

  • 宫主症是主要的形状 (46.6%-54.6%),其次是直线形状 (28.2%-30.1%) 和密封形状 (15.3%-25.2%).
  • 大约三分之一的个体使用CA和PTA方法被分为不同的形状组.
  • 宫脊柱的角度依赖于年龄,但独立于性别.
  • T1SA显示与CA和PTA有显著的相关性 (r=0.640,r=0.585;p<0.001).

结论:

  • 椎脊柱形状的评估取决于方法.
  • 年龄显著影响椎脊柱的形状.
  • 射手平衡与椎脊柱曲率和头部位置有关.