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Related Concept Videos

Stress: General Loading Conditions01:15

Stress: General Loading Conditions

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To grasp the intricacy of real-world conditions where multiple loads are applied simultaneously to a structure, one might visualize a section passing through a specific point within a body, aligned parallel to the xy plane. This section is subjected to various forces, including original loads, normal forces, and shearing forces.
The shearing force, possessing potential directionality within the plane of the section, is simplified into two component forces running parallel to the x and y axes....
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Eccentric Loading01:16

Eccentric Loading

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Eccentric loading is a crucial concept in the study of structural engineering and mechanics, particularly when analyzing the stability and stress distribution in columns. Unlike centric loading, where the force is applied along the centroidal axis, causing uniform compression, eccentric loading occurs when a force is applied off-center. This off-center application introduces not only direct compressive stress but also bending stress, significantly influencing the column's behavior under...
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Saint-Venant's Principle01:18

Saint-Venant's Principle

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The principle of Saint-Venant postulates that the stress distribution within a structural member does not rely on the precise method of load application except in the vicinity of the load application points. Consider a scenario where loads are centrally applied on two plates. In this case, the plates move toward each other without any rotation. This movement causes the member to contract in length and expand in width and thickness. Uniform deformation across all elements and maintaining...
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General Case of Eccentric Axial Loading01:12

General Case of Eccentric Axial Loading

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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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Stresses under Combined Loadings01:23

Stresses under Combined Loadings

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When analyzing a bent tube with a circular cross-section subjected to multiple forces, it is crucial to determine the stress distribution in order to maintain structural integrity under varied load conditions.
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Normal Strain under Axial Loading01:20

Normal Strain under Axial Loading

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Normal strain under axial loading is an important concept in the field of mechanics of materials. Axial loading implies the application of a force along the axis of a material, like a column or bar. This force can either compress or stretch the material. In the context of axial loading, normal strain is the deformation experienced by the material in the direction of the loading force. It's calculated as the change in length divided by the original length of the material. This unitless ratio...
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Related Experiment Video

Updated: Feb 26, 2026

Construction of Constant-Load (Isotonic) and Constant-Velocity (Isokinetic) Torque-Velocity-Power Profiles In vivo for the Rat Plantar Flexors
07:44

Construction of Constant-Load (Isotonic) and Constant-Velocity (Isokinetic) Torque-Velocity-Power Profiles In vivo for the Rat Plantar Flexors

Published on: October 3, 2025

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Differences in the Load-Velocity Profile Between 4 Bench-Press Variants.

Amador García-Ramos, Francisco Luis Pestaña-Melero, Alejandro Pérez-Castilla

    International Journal of Sports Physiology and Performance
    |July 18, 2017
    PubMed
    Summary
    This summary is machine-generated.

    The bench-press (BP) exercise shows a strong load-velocity relationship across variants. Specific equations are needed for each BP type to accurately track individual progress and performance.

    Keywords:
    ballisticconcentric-onlystretch-shortening cycletraditional

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    Area of Science:

    • Biomechanics
    • Exercise Physiology
    • Sports Science

    Background:

    • The load-velocity relationship is crucial for understanding resistance exercise.
    • Different bench-press (BP) variants may influence this relationship.
    • Accurate assessment requires understanding these variations.

    Purpose of the Study:

    • To compare the load-velocity relationship across four distinct bench-press (BP) exercise variations.
    • To determine if specific BP techniques alter the relationship between load and movement velocity.

    Main Methods:

    • Thirty male participants performed incremental loading tests up to their 1-repetition maximum (1RM).
    • The study evaluated four BP variants: concentric-only BP, concentric-only BP throw (BPT), eccentric-concentric BP, and eccentric-concentric BPT.
    • Mean velocity (MV) was measured at each load percentage.

    Main Results:

    • A strong, linear relationship (r² > .96) was found between mean velocity (MV) and %1RM for all BP variants.
    • Eccentric-concentric techniques yielded significantly higher MV than concentric-only techniques.
    • BP throw (BPT) showed higher MV at light-to-moderate loads (20-70%1RM) in the concentric-only variation.

    Conclusions:

    • Specific load-velocity equations are necessary for each bench-press variant.
    • Individual load-velocity profiles exist and should be considered in training.
    • Understanding these profiles enhances the specificity of training prescription.