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Cable Subjected to a Distributed Load01:24

Cable Subjected to a Distributed Load

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The analysis of suspension bridges is a complex and critical process that involves multiple factors, including the shape and tension of the main cables. The main cables of suspension bridges are subjected to distributed loads, which result in changes in tensile forces and deformation of the cable. These loads must be carefully considered to ensure that the bridge is safe and capable of supporting the weight of different loads.
651
Cable Subjected to Its Own Weight01:13

Cable Subjected to Its Own Weight

432
Overhead power transmission lines rely on cables to carry electricity across large distances. To ensure the stability and functionality of these lines, it is crucial to understand the shape and tension experienced by the cables under the influence of their weight.
A generalized loading function is employed to analyze a cable subjected to its own weight. This function considers the force acting along the cable's arc length rather than its projected length, providing a more accurate...
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Cable: Problem Solving01:29

Cable: Problem Solving

316
When dealing with a cable that is fixed to two supports and subjected to uniform loading, it is crucial to determine the maximum tension in the cable. This process can be broken down into several key steps, as outlined below:
316
Cable Subjected to Concentrated Loads01:28

Cable Subjected to Concentrated Loads

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Flexible cables are commonly used in various applications for support and load transmission. Consider a cable fixed at two points and subjected to multiple vertically concentrated loads. Determine the shape of the cable and the tension in each portion of the cable, given the horizontal distances between the loads and supports.
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Frames: Problem Solving I01:24

Frames: Problem Solving I

451
Consider a jib crane with an external load suspended from the pulley. The dimensions of the crane members are shown in the figure. A systematic analysis of the frame structure is required to determine the reaction forces at the pin joints, assuming that the pulleys are frictionless.
451
Machines: Problem Solving II01:30

Machines: Problem Solving II

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Machines are complex structures consisting of movable, pin-connected multi-force members that work together to transmit forces. Consider a lifting tong carrying a 100 kg load. It comprises movable sections DAF and CBG linked together with member AB.
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Related Experiment Video

Updated: Jun 11, 2025

Murine Spinotrapezius Model to Assess the Impact of Arteriolar Ligation on Microvascular Function and Remodeling
16:43

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A Cadaveric Study of the Rotator Cable: Interrogating the Suspension Bridge Model.

Timothy R Kanne1, John Lusk1, Cassidy Clark1

  • 1Medicine, Edward Via College of Osteopathic Medicine-Auburn, Auburn, USA.

Cureus
|October 7, 2024
PubMed
Summary

The rotator cable attaches tightly to the supraspinatus and teres minor muscles. However, the infraspinatus muscle shows a looser attachment, particularly its superior portion, suggesting varied roles in shoulder biomechanics.

Keywords:
cadaveric studyinfraspinatusrotator cablerotator cuffshoulder pathology

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Area of Science:

  • Orthopedic Surgery
  • Anatomy
  • Biomechanics

Background:

  • The rotator cable is a critical component of the rotator cuff, influencing shoulder joint mechanics.
  • Understanding rotator cuff muscle attachments to the rotator cable is essential for diagnosing and treating shoulder pathologies.

Purpose of the Study:

  • To anatomically describe the relationships between rotator cuff muscles and the rotator cable.
  • To investigate the differential attachments of the infraspinatus muscle to the rotator cable.

Main Methods:

  • Cadaveric dissection of 30 shoulders.
  • Detailed description of rotator cable and rotator cuff muscle attachments.
  • Measurement of infraspinatus attachment width and thickness.
  • Documentation of osteoarthritis, labral, and rotator cuff pathology.

Main Results:

  • Supraspinatus and teres minor demonstrated tight adherence to the rotator cable.
  • The superior portion of the infraspinatus was less tightly adherent than the inferior portion in 26/30 shoulders.
  • A significant difference in the infraspinatus thickness/width ratio was observed in shoulders with osteoarthritis and labral pathology.

Conclusions:

  • The varied attachment of the infraspinatus to the rotator cable may indicate a specific functional role, potentially involving stress shielding.
  • Findings suggest that only the inferior infraspinatus might participate in stress shielding or it could be a compensatory mechanism.
  • This study provides insights into rotator cable function and differential infraspinatus tendon mechanics.