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Related Concept Videos

General Case of Eccentric Axial Loading01:12

General Case of Eccentric Axial Loading

599
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 symmetrical bending, which are essential for designing structures to withstand different loading conditions.
Consider a member subjected to equal and opposite forces that are applied along a line that does not coincide with the member's neutral axis. In unsymmetrical...
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Torsion of Noncircular Members01:16

Torsion of Noncircular Members

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Circular shafts undergoing torsional stress maintain their cross-sectional integrity due to their axisymmetric nature. This symmetry ensures an even distribution of stress, allowing the shaft to withstand torsion without distorting. In contrast, square bars, lacking this axial symmetry, experience significant distortion across their cross-sections when subjected to torsion, with the exception of along their diagonals and at lines connecting midpoints. A detailed examination of a cubic element...
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Bending and Torsional Moments01:20

Bending and Torsional Moments

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Bending and torsional moments are two fundamental concepts in structural engineering. They play an important role in understanding the behavior of materials and structures under different loading conditions.
The reaction developed in a structural element when subjected to an external force causes the element to bend. When a structural element bends upwards, it creates compressive normal forces on the top and tensile normal forces on the bottom, resulting in a couple that determines the bending...
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Angle of Twist - Elastic Range01:13

Angle of Twist - Elastic Range

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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...
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Thin-Walled Hollow Shafts01:15

Thin-Walled Hollow Shafts

664
In analyzing a thin-walled hollow shaft subjected to torsional loading, a segment with width dx is isolated for examination. Despite its equilibrium state, this segment faces torsional shearing forces at its ends. These forces are quantitatively described by the product of the longitudinal shearing stress on the segment's minor surface and the area of this surface, leading to the concept of shear flow. This shear flow is consistent throughout the structure, indicating a uniform distribution of...
664
Eccentric Axial Loading in a Plane of Symmetry01:16

Eccentric Axial Loading in a Plane of Symmetry

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Eccentric axial loading occurs when an axial load is applied away from the centroidal axis of a structural member. This scenario is common in engineering, where structural elements may not be directly aligned due to various design or functional requirements.
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Related Experiment Video

Updated: Mar 27, 2026

Three Dimensional Vestibular Ocular Reflex Testing Using a Six Degrees of Freedom Motion Platform
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[Omental torsion. Case Report].

Janny Lizbeth Zaleta-Cruz1, Javier Rojas-Méndez1, Ulises Garza-Serna1

  • 1Escuela de Medicina, Tecnológico de Monterrey, Monterrey, Nuevo León, México.

Cirugia Y Cirujanos
|January 16, 2016
PubMed
Summary

Omental torsion, a rare cause of acute abdominal pain, can mimic appendicitis. Early diagnosis via imaging and laparoscopic resection of affected tissue are crucial for effective treatment.

Keywords:
Abdomen agudoAcute abdomenEpiplónLaparoscopicLaparoscópicaOmentumTorsionTorsión

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Area of Science:

  • Abdominal Surgery
  • Gastroenterology
  • Diagnostic Imaging

Background:

  • Omental torsion is an uncommon cause of acute abdomen with non-specific symptoms, often presenting as isolated right iliac fossa pain.
  • Potential risk factors include obesity, congenital anomalies, and tumors, categorized as predisposing/triggering and primary/secondary/external/internal.

Observation:

  • A 24-year-old male presented with right iliac fossa pain, initially diagnosed as acute appendicitis.
  • Laparoscopic surgery revealed omental torsion as the actual cause.

Findings:

  • Omental torsion diagnosis is challenging due to non-specific symptoms.
  • Computed tomography (CT) and ultrasound have proven effective in diagnosis.
  • Laparoscopic surgery is the standard treatment for resecting necrotic omental tissue.

Implications:

  • Highlights the importance of considering omental torsion in differential diagnoses for acute abdominal pain.
  • Emphasizes the role of advanced imaging in accurate diagnosis.
  • Demonstrates the efficacy of laparoscopic surgery for treating omental torsion.