Jove
Visualize
Contáctanos
JoVE
x logofacebook logolinkedin logoyoutube logo
ACERCA DE JoVE
Visión GeneralLiderazgoBlogCentro de Ayuda JoVE
AUTORES
Proceso de PublicaciónConsejo EditorialAlcance y PolíticasRevisión por ParesPreguntas FrecuentesEnviar
BIBLIOTECARIOS
TestimoniosSuscripcionesAccesoRecursosConsejo Asesor de BibliotecasPreguntas Frecuentes
INVESTIGACIÓN
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchivo
EDUCACIÓN
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualCentro de Recursos para ProfesoresSitio de Profesores
Términos y Condiciones de Uso
Política de Privacidad
Políticas

Videos de Conceptos Relacionados

Electrostatic Boundary Conditions in Dielectrics01:27

Electrostatic Boundary Conditions in Dielectrics

1.2K
When an electric field passes from one homogeneous medium to another, crossing the boundary between the two mediums imparts a discontinuity in the electric field. This results in electrostatic boundary conditions that depend on the type of mediums the field propagates through.
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's...
1.2K
Transformation of Plane Strain01:12

Transformation of Plane Strain

171
When analyzing elongated structures like bars subjected to uniformly distributed loads, it is essential to understand the transformation of plane strain when coordinate axes are rotated. This transformation helps to assess how material deformation characteristics vary with orientation, which is crucial in materials science and structural engineering.
Under plane strain conditions, typical for members where one dimension significantly exceeds the others, deformations and resultant strains are...
171
Elastic Strain Energy for Shearing Stresses01:20

Elastic Strain Energy for Shearing Stresses

200
As discussed in previous lessons, strain energy in a material is the energy stored when it is elastically deformed, a concept crucial in materials science and mechanical engineering. This energy results from the internal work done against the cohesive forces within the material. When a material undergoes shearing stress and corresponding shearing strain, the strain energy density, which is the energy stored per unit volume, is calculated. Within the elastic limit, where the stress is...
200
Shearing Strain01:20

Shearing Strain

347
The shearing strain represents a cubic element's angular change when subjected to shearing stress. This type of stress can transform a cube into an oblique parallelepiped without influencing normal strains. The cubic element experiences a significant transformation when exposed solely to shearing stress. Its shape alters from a perfect cube into a rhomboid, clearly demonstrating the effect of shearing strain. The degree of this strain is considered positive if it reduces the angle between...
347
Significance of Displacement Current01:27

Significance of Displacement Current

4.6K
A displacement current is analogous to a real current in Ampère's law, participating in Ampère's law the same way as the usual conduction current. However, it is produced by a changing electric field. Displacement current is defined in terms of a time-varying electric field, and also has an associated displacement current density. By adding a term accounting for displacement current, Maxwell modified the existing Ampère's law, which is now called generalized Ampère's law.
4.6K
Transformation of Plane Stress01:18

Transformation of Plane Stress

234
Studying stress transformation is essential in understanding how stress components within a material, like a cube under plane stress, change with rotation. This change is analyzed by considering a prismatic element within the cube. As the element rotates, the stress components acting on it—both normal and shearing stresses—change in magnitude and orientation. This change is quantified using trigonometric functions of the rotation angle, relating the forces acting on the rotated element's...
234

También podría leer

Artículos Relacionados

Artículos vinculados a este trabajo por autores compartidos, revista y gráfico de citas.

Ordenar por
Same author

Launching a new era for Short Communications in Journal of Synchrotron Radiation.

Journal of synchrotron radiation·2026
Same author

Measuring the principle Hugoniot of low-density silica aerogel foam at pressures up to 160 GPa.

Physical review. E·2026
Same author

Background-Free Intensity Autocorrelation for Femtosecond X-Ray Pulses.

Physical review letters·2026
Same author

High-throughput inclined scanning three-dimensional X-ray diffraction microscopy via dual line-beam X-point scanning.

IUCrJ·2026
Same author

Total-reflection-based microscope compatible with X-ray and visible light for sample positioning.

Journal of synchrotron radiation·2026
Same author

Compact tape-driven sample delivery system for serial femtosecond crystallography.

Journal of applied crystallography·2026
Same journal

Erratum for the Research Article "Detecting supramolecular organic nanoparticles during heat wave".

Science (New York, N.Y.)·2026
Same journal

Local signals, systemic decline.

Science (New York, N.Y.)·2026
Same journal

The mechanics of liver regeneration.

Science (New York, N.Y.)·2026
Same journal

Computing in a memory with physics.

Science (New York, N.Y.)·2026
Same journal

Retraction.

Science (New York, N.Y.)·2026
Same journal

Making time.

Science (New York, N.Y.)·2026
Ver todos los artículos relacionados

Video Experimental Relacionado

Updated: Jul 14, 2025

Theoretical Calculation and Experimental Verification for Dislocation Reduction in Germanium Epitaxial Layers with Semicylindrical Voids on Silicon
06:57

Theoretical Calculation and Experimental Verification for Dislocation Reduction in Germanium Epitaxial Layers with Semicylindrical Voids on Silicon

Published on: July 17, 2020

2.2K

Propagación de la dislocación transónica en el diamante

Kento Katagiri1,2,3,4,5, Tatiana Pikuz6, Lichao Fang3,4,5

  • 1Graduate School of Engineering, Osaka University, Suita, 565-0871, Japan.

Science (New York, N.Y.)
|October 5, 2023
PubMed
Resumen
Este resumen es generado por máquina.

Se observó que el movimiento de dislocación ultrarrápida en el diamante se movía más rápido que la velocidad del sonido. Este estudio proporciona evidencia para el movimiento de dislocación transónica, crucial para comprender las propiedades del material en condiciones extremas.

Más Videos Relacionados

Characterization of Ultra-fine Grained and Nanocrystalline Materials Using Transmission Kikuchi Diffraction
09:13

Characterization of Ultra-fine Grained and Nanocrystalline Materials Using Transmission Kikuchi Diffraction

Published on: April 1, 2017

13.7K
Electron Channeling Contrast Imaging for Rapid III-V Heteroepitaxial Characterization
07:50

Electron Channeling Contrast Imaging for Rapid III-V Heteroepitaxial Characterization

Published on: July 17, 2015

11.1K

Videos de Experimentos Relacionados

Last Updated: Jul 14, 2025

Theoretical Calculation and Experimental Verification for Dislocation Reduction in Germanium Epitaxial Layers with Semicylindrical Voids on Silicon
06:57

Theoretical Calculation and Experimental Verification for Dislocation Reduction in Germanium Epitaxial Layers with Semicylindrical Voids on Silicon

Published on: July 17, 2020

2.2K
Characterization of Ultra-fine Grained and Nanocrystalline Materials Using Transmission Kikuchi Diffraction
09:13

Characterization of Ultra-fine Grained and Nanocrystalline Materials Using Transmission Kikuchi Diffraction

Published on: April 1, 2017

13.7K
Electron Channeling Contrast Imaging for Rapid III-V Heteroepitaxial Characterization
07:50

Electron Channeling Contrast Imaging for Rapid III-V Heteroepitaxial Characterization

Published on: July 17, 2015

11.1K

Área de la Ciencia:

  • Ciencias de los materiales
  • Mecánica de los sólidos
  • La cristalografía

Sus antecedentes:

  • El movimiento de dislocación es clave para la deformación del material.
  • La velocidad máxima de las dislocaciones sigue siendo una cuestión abierta.
  • Los modelos teóricos sugieren una velocidad limitante, pero los transónicos son posibles.

Objetivo del estudio:

  • Para investigar experimentalmente el movimiento de dislocación ultrarrápida.
  • Para determinar si las dislocaciones pueden exceder la velocidad del sonido.
  • Para proporcionar pruebas de desplazamientos parciales en movimiento transsónico.

Principales métodos:

  • Se empleó la radiografía de rayos X de cinco segundos.
  • Rastreando el movimiento de dislocación en un diamante de un solo cristal comprimido por choque.
  • Visualizar la propagación de las fallas de apilamiento.

Principales resultados:

  • Las fallas de apilamiento observadas se propagan más rápido que la velocidad de onda de sonido más lenta en el diamante.
  • Proporcionó evidencia directa de dislocaciones parciales que se movían a velocidades transónicas.
  • Demostró la posibilidad de exceder la velocidad límite prevista.

Conclusiones:

  • Las dislocaciones parciales pueden moverse a velocidades transónicas.
  • La evidencia experimental apoya la existencia de dislocaciones en movimiento transsónico.
  • Comprender los límites de movilidad de la dislocación es vital para los materiales en condiciones extremas.