Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Shear on the Horizontal Face of a Beam Element

Shear on the Horizontal Face of a Beam Element

To understand shear on the flat side of a prismatic beam element, consider the vertical and horizontal shearing forces, and the normal forces, acting on the element. The element's upper (U) and lower (L) sections, which are divided by the beam's neutral axis, are examined. The equilibrium of these forces is determined by applying the equilibrium equation, which helps identify the horizontal shearing force. This force is directly related to the bending moments and the cross-section's first...

Principal Stresses in a Beam

Principal Stresses in a Beam

In prismatic beams subject to arbitrary transverse loading, It is essential to analyze the interaction between shear forces and bending moments in order to understand stress distribution and ensure structural integrity. The highest normal or bending stress occurs at the outer fibers of the beam, decreasing linearly to zero at the neutral axis. In contrast, shear stress peaks at the neutral axis and diminishes toward the outer surfaces.
Analyzing principal stresses is crucial, especially in...

Deformation of a Beam under Transverse Loading

Deformation of a Beam under Transverse Loading

Understanding beam deflection, particularly for indeterminate beams with overhanging segments and multiple concentrated loads, is crucial for ensuring structural integrity and functionality. The process begins with constructing an accurate free-body diagram, which helps identify the forces and moments acting on the beam. This diagram is vital for visualizing how bending moments vary along the beam's length, influencing its curvature.
The insights from the bending moment diagram extend to...

Deflection of a Beam

Deflection of a Beam

Accurately determining beam deflection and slope under various loading conditions in structural engineering is crucial for ensuring safety and structural integrity. Singularity functions offer a streamlined approach to analyzing beams, especially when multiple loading functions complicate the bending moment equation.
Singularity functions, described in an earlier lesson, are powerful mathematical tools that represent discontinuities within a function commonly encountered in structural loading...

Beams with Unsymmetric Loadings

Beams with Unsymmetric Loadings

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...

Impact Loading on a Cantilever Beam

Impact Loading on a Cantilever Beam

The analysis of a cantilever beam with a circular cross-section subjected to impact loading at its free end illustrates the conversion of potential energy from a dropped object into kinetic energy, which is then absorbed by the beam as strain energy. This process is crucial for understanding how materials behave under dynamic loads, which is important in fields such as construction and aerospace.
When an object is dropped onto the free end of a cantilever, its potential energy due to gravity is...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

[Vigilance for veterinary medicinal products: reports of adverse reactions in the year 2013].

Schweizer Archiv fur Tierheilkunde·2014

Same author

2,3-Bis(4-nitrobenzylthio)maleonitrile

Acta crystallographica. Section C, Crystal structure communications·2000

Same author

Changes of reliability and efficiency of micronucleus bioassay in Vicia faba after exposure to metal contamination for several generations.

Environmental and experimental botany·2000

Same author

Identification of a new trace 114R SiC by HREM.

Acta crystallographica. Section B, Structural science·2000

Same author

Novel photoluminescent polymers containing oligothiophene and m-phenylene-1,3,4-oxadiazole moieties: synthesis and spectroscopic and electrochemical studies

The Journal of organic chemistry·2000

Same author

Structure analysis by diffraction of amorphous zones created by Ni ion implantation into pure Al

Ultramicroscopy·2000

Search research articles

Related Experiment Video

Updated: Jul 23, 2026

Highly Resolved Intravital Striped-illumination Microscopy of Germinal Centers

Highly Resolved Intravital Striped-illumination Microscopy of Germinal Centers

Published on: April 9, 2014

Weak beam under convergent beam illumination

Schaublin¹, Meng, Stobbs

¹Department of Materials Science and Metallurgy, University of Cambridge, UK. robin.schaeublin@psi.ch

Ultramicroscopy

|June 7, 2000

Summary

Accurately measuring dissociated dislocation spacing using the weak beam technique requires accounting for beam convergence. This study shows beam convergence is key for precise stacking fault energy determination in materials science.

More Related Videos

A Guide to Structured Illumination TIRF Microscopy at High Speed with Multiple Colors

A Guide to Structured Illumination TIRF Microscopy at High Speed with Multiple Colors

Published on: May 30, 2016

A Guide to Build a Highly Inclined Swept Tile Microscope for Extended Field-of-view Single-molecule Imaging

A Guide to Build a Highly Inclined Swept Tile Microscope for Extended Field-of-view Single-molecule Imaging

Published on: April 8, 2019

Related Experiment Videos

Last Updated: Jul 23, 2026

Highly Resolved Intravital Striped-illumination Microscopy of Germinal Centers

Highly Resolved Intravital Striped-illumination Microscopy of Germinal Centers

Published on: April 9, 2014

A Guide to Structured Illumination TIRF Microscopy at High Speed with Multiple Colors

A Guide to Structured Illumination TIRF Microscopy at High Speed with Multiple Colors

Published on: May 30, 2016

A Guide to Build a Highly Inclined Swept Tile Microscope for Extended Field-of-view Single-molecule Imaging

A Guide to Build a Highly Inclined Swept Tile Microscope for Extended Field-of-view Single-molecule Imaging

Published on: April 8, 2019

Area of Science:

Materials Science
Physical Metallurgy
Transmission Electron Microscopy

Background:

The weak beam technique is crucial for determining stacking fault energies, especially in intermetallic alloys.
Accurate measurement of dissociated dislocation spacing is vital for the reliability of this technique.
The relationship between dislocation image position and actual position is critical for accurate analysis.

Purpose of the Study:

To investigate the accuracy of determining partial dislocation spacing from weak beam images.
To explore the influence of various parameters on measurement accuracy, including beam convergence.
To model a dissociated dislocation in copper under specific weak beam conditions.

Main Methods:

Utilized image simulations for a model case of a dislocation dissociated into two Shockley partial dislocations in copper.
Examined orientations under the g(3g) weak beam condition at 100 kV.
Analyzed the impact of dislocation character, foil thickness, depth, diffraction condition, and beam convergence on measurement accuracy.

Main Results:

Image simulations indicate that a beam convergence of approximately 5 mrad significantly enhances measurement accuracy.
Beam convergence was identified as the principal parameter controlling the precision of partial dislocation spacing measurements.
The accuracy of determining true partial dislocation spacing is dependent on several factors, including beam convergence.

Conclusions:

Quantitative consideration of beam convergence is essential for accurately deducing true partial dislocation spacing.
Optimizing beam convergence improves the reliability of weak beam technique applications in materials characterization.
This study highlights the importance of precise simulation parameters for accurate dislocation analysis.