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Related Concept Videos

Deformation of Member under Multiple Loadings01:11

Deformation of Member under Multiple Loadings

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When a rod is made of different materials or has various cross-sections, it must be divided into parts that meet the necessary conditions for determining the deformation. These parts are each characterized by their internal force, cross-sectional area, length, and modulus of elasticity. These parameters are then used to compute the deformation of the entire rod.
In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...
623
Deformations in a Symmetric Member in Bending01:18

Deformations in a Symmetric Member in Bending

648
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...
648
Beams with Unsymmetric Loadings01:17

Beams with Unsymmetric Loadings

497
Analyzing a supported beam under unsymmetrical loadings is essential in structural engineering to understand how beams respond to varied force distributions. This analysis involves calculating the deflection and identifying points where the slope of the beam is zero, which are crucial for ensuring structural stability and functionality.
The first moment-area theorem determines the slope at any point on the beam. This theorem indicates that the change in slope between two points on a beam...
497
Temperature Dependent Deformation01:12

Temperature Dependent Deformation

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In a nonhomogeneous rod made up of steel and brass, restrained at both ends and subjected to a temperature change, several steps are involved in calculating the stress and compressive load. Due to the problem's static indeterminacy, one end support is disconnected, allowing the rod to experience the temperature change freely. Next, an unknown force is applied at the free end, triggering deformations in the rod's steel and brass portions. These deformations are then calculated and added...
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Bending of Curved Members - Strain Analysis01:14

Bending of Curved Members - Strain Analysis

648
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...
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Deformation in a Circular Shaft01:10

Deformation in a Circular Shaft

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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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Finite Element Modeling for the Simulation of the Quasi-Static Compression of Corrugated Tapered Tubes
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Quantifying foot deformation using finite helical angle.

Claude Pothrat1, Benjamin Goislard de Monsabert1, Laurent Vigouroux1

  • 1Aix-Marseille University, CNRS, ISM UMR 7287, 163 avenue de Luminy, 13288 Marseille cedex 09, France.

Journal of Biomechanics
|August 31, 2015
PubMed
Summary
This summary is machine-generated.

This study introduces a new method to measure total foot deformation using a helical angle, simplifying foot motion analysis. This approach effectively differentiates movements and assesses skill mastery in sports and clinical settings.

Keywords:
Foot kinematicsRepeatabilitySport movements

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Area of Science:

  • Biomechanics
  • Human Movement Analysis
  • Sports Science

Background:

  • Foot intrinsic motion involves complex joint interactions, enabling high adaptability.
  • Current foot kinematic models focus on small-scale bone motions, requiring complex methods and interpretation for global function assessment.

Purpose of the Study:

  • To propose a simplified method for assessing total foot deformation using helical angles.
  • To evaluate the method's ability to differentiate various foot movements and assess skill mastery.

Main Methods:

  • Calculating a helical angle from rearfoot and forefoot relative motions.
  • Utilizing a limited number of retro-reflective markers.
  • Testing the method across five distinct movements (walking, running variations, cutting, U-turn) with 12 participants.

Main Results:

  • The helical angle method successfully identified different movements based on observed amplitude variations.
  • High repeatability of the helical angle pattern correlated with well-mastered movements, indicating skill proficiency.
  • The method demonstrated suitability for distinguishing movement types and assessing skill levels.

Conclusions:

  • The proposed helical angle method offers a simplified approach to assess global foot function.
  • This protocol can complement existing methods for comprehensive foot function evaluation in sports and clinical contexts.
  • Repeatability analysis provides insights into movement mastery and skill acquisition.