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Related Concept Videos

Unsymmetric Bending01:18

Unsymmetric Bending

327
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...
327
Unsymmetric Bending - Angle of Neutral Axis01:15

Unsymmetric Bending - Angle of Neutral Axis

297
Unsymmetrical bending occurs when a structural member is subjected to bending moments in a plane that does not align with the member's principal axes. This scenario typically arises in beams and other structural components when loads are applied at non-ideal angles, introducing complexities in stress analysis.
When a bending moment is applied at an angle θ concerning the vertical axis of a symmetrical member, it can be resolved into components along the member's principal...
297
Symmetric Member in Bending01:07

Symmetric Member in Bending

168
In the study of the mechanics of materials, analyzing the behavior of prismatic members under opposing couples is crucial for understanding internal stress distributions, which are essential for structural design. When subjected to couples, a prismatic member experiences internal forces that maintain equilibrium. A couple, characterized by two equal and opposite forces, creates a moment but no resultant force. The internal forces at any section cut of the member must balance these external...
168
Bending of Curved Members - Strain Analysis01:14

Bending of Curved Members - Strain Analysis

134
The mechanics of deformation in curved members, such as beams or arches, under bending moments, involve complex responses. When such a member, symmetric about the y-axis and shaped like a segment of a circle centered at point C, is subjected to equal and opposite forces, its curvature and surface lengths change significantly. This alteration results in the shift of the curvature's center from C to C', indicating a tighter curve.
The important part of bending analysis for such a member...
134
Bending and Torsional Moments01:20

Bending and Torsional Moments

3.7K
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...
3.7K
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

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Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
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Bending skyrmion strings under two-dimensional thermal gradients.

Kejing Ran1,2, Wancong Tan1, Xinyu Sun1

  • 1School of Physical Science and Technology and ShanghaiTech Laboratory for Topological Physics, ShanghaiTech University, Shanghai, China.

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|June 7, 2024
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Researchers bent three-dimensional magnetic skyrmion strings in chiral magnets using thermal gradients. This study reveals magnon friction and suggests new ways to control skyrmions for future devices.

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Area of Science:

  • Condensed Matter Physics
  • Materials Science

Background:

  • Magnetic skyrmions are topologically protected vortices crucial for spintronic devices.
  • Controlling skyrmion strings in three dimensions is an underexplored area.
  • Previous research focused on in-plane skyrmion dynamics.

Purpose of the Study:

  • To investigate the dynamical control of three-dimensional magnetic skyrmion strings.
  • To explore novel methods for manipulating skyrmion behavior in chiral magnets.
  • To provide experimental evidence for theoretical predictions regarding skyrmion dynamics.

Main Methods:

  • Utilized orthogonal thermal gradients to influence skyrmion strings.
  • Employed small angle neutron scattering (SANS) for observation.
  • Investigated the chiral magnet manganese silicide (MnSi).

Main Results:

  • Successfully demonstrated the effective bending of three-dimensional skyrmion strings.
  • Observed unexpected dynamical behavior linked to the temperature-dependent skyrmion Hall effect.
  • Provided experimental evidence for magnon friction in skyrmion dynamics.

Conclusions:

  • The findings suggest a modification of Thiele's equation is necessary.
  • Magnon friction plays a key role in skyrmion dynamics.
  • An additional degree of freedom for manipulating three-dimensional skyrmions has been identified.