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Related Concept Videos

Angle of Twist - Elastic Range01:13

Angle of Twist - Elastic Range

Consider a cylindrical shaft with a length denoted by L and a consistent cross-sectional radius referred to as r. This shaft undergoes a torque at the free end. The highest shearing strain within the shaft is directly proportional to the twist angle and the radial distance from the shaft axis. When the shaft behaves elastically, this shearing strain can be articulated using variables such as the applied torque, radial distance, the polar moment of inertia, and the modulus of rigidity. By...
Angle of Twist: Problem Solving01:13

Angle of Twist: Problem Solving

An electric motor applies a torque of 700 N·m to an aluminum shaft, triggering a stable rotation. Two pulleys, B and C, are subjected to torques of 300 N·m and 400 N·m, respectively. The modulus of rigidity is provided as 25 GPa. With the knowledge of the length and diameter of each segment, the twist angle between the two pulleys can be computed. First, a section cut is made between pulleys B and C, and the cut cross-section is analyzed using a free-body diagram. Given that the torque exerted...
Stresses in a Shaft01:18

Stresses in a Shaft

The shaft PQ is subjected to a twisting force when equal and opposite torques are applied on either side. A section that cuts perpendicular to the shaft's axis at any arbitrary point R is examined to understand this. When the free-body diagram of the QR segment is analyzed, it reveals the shearing forces exerted by the PR portion onto the QR segment as the shaft experiences twisting.
Applying equilibrium conditions to the QR segment establishes that the internal shearing forces within the...
Unsymmetric Bending01:18

Unsymmetric Bending

Unsymmetrical bending occurs when the bending moment applied to a structural member does not align with its principal axis. This misalignment leads to complex stress distributions and deflection patterns that differ from those in symmetrical bending, and are essential for designing structures to withstand different loading conditions. In unsymmetrical bending, the neutral axis—where stress is zero—does not necessarily align with the geometric axes of the cross-section. The orientation of the...
Unsymmetric Loading of Thin-Walled Members01:23

Unsymmetric Loading of Thin-Walled Members

Thin-walled members with non-symmetrical cross-sections are vital to engineering structures, offering material efficiency and structural integrity. However, unsymmetrical loading on these members leads to complex stress distributions, resulting in simultaneous bending and twisting can cause deformation or structural failure. The interaction between bending and twisting requires detailed analysis to ensure structural resilience.
The concept of the shear center is crucial in countering the...
Deformation in a Circular Shaft01:10

Deformation in a Circular Shaft

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...

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Related Experiment Video

Updated: Jun 1, 2026

Method to Measure Tone of Axial and Proximal Muscle
10:41

Method to Measure Tone of Axial and Proximal Muscle

Published on: December 14, 2011

A twisted mess.

Paul S Tlucek1, Annie Moreau, R Michael Siatkowski

  • 1Dean McGee Eye Institute, Oklahoma City, OK 73104, USA.

Survey of Ophthalmology
|May 31, 2011
PubMed
Summary
This summary is machine-generated.

Wyburn-Mason syndrome caused painless vision loss in a 12-year-old girl due to a retro-orbital arteriovenous malformation. This case highlights the importance of recognizing this rare vascular condition and its potential ocular complications.

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Iris Fixation via External Pentagram Suturing
05:22

Iris Fixation via External Pentagram Suturing

Published on: May 5, 2022

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Last Updated: Jun 1, 2026

Method to Measure Tone of Axial and Proximal Muscle
10:41

Method to Measure Tone of Axial and Proximal Muscle

Published on: December 14, 2011

Iris Fixation via External Pentagram Suturing
05:22

Iris Fixation via External Pentagram Suturing

Published on: May 5, 2022

Area of Science:

  • Ophthalmology
  • Neurology
  • Vascular Medicine

Background:

  • Wyburn-Mason syndrome is a rare arteriovenous malformation affecting the brain, face, and eye.
  • Ocular involvement can lead to significant visual impairment.

Observation:

  • A 12-year-old female presented with sudden, painless decreased vision in her left eye.
  • Fundus examination revealed findings consistent with Wyburn-Mason syndrome.
  • Neuroimaging confirmed a retro-orbital arteriovenous malformation.

Findings:

  • The retro-orbital arteriovenous malformation was identified as the cause of vision loss.
  • Discussion of the pathophysiology linking vascular malformations to optic nerve compromise.

Implications:

  • Early diagnosis and multidisciplinary management are crucial for Wyburn-Mason syndrome.
  • Understanding the etiology aids in timely intervention to preserve vision.
  • This case underscores the need for comprehensive evaluation in suspected vascular anomalies.