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Related Concept Videos

Plastic Deformations01:19

Plastic Deformations

Plastic deformation represents a fundamental concept in materials science, which explains the irreversible change in the shape of a material when it experiences stress beyond its elastic capability. This phenomenon is important in structural engineering, especially in designing and analyzing cantilever beams—structures that are securely fixed at one end and bear loads at the opposite end. When these beams are subjected to loads within their elastic range, they will return to their original...
Plastic Deformations01:14

Plastic Deformations

It is essential to understand how structural members behave under plastic deformation when the bending stress exceeds the material's yield strength. This state of deformation permanently alters the shape of the member, in contrast to the linear elastic behavior observed before yielding. The strain at any point in the member is expressed in terms of maximum strain. Notably, the neutral axis, which coincides with the centroid during elastic bending, shifts away from the centroid under plastic...
Plastic Deformations of Members with a Single Plane of Symmetry01:21

Plastic Deformations of Members with a Single Plane of Symmetry

When a structural member undergoes plastic deformation due to bending, it is crucial to understand the position of the neutral axis and the stress distribution. This member, characterized by a single plane of symmetry, exhibits a uniform stress distribution, with negative stress above the neutral axis and positive stress below. Notably, the neutral axis does not align with the centroid of the cross-section. This misalignment is typical in cases where the cross-section is not rectangular or...
Plasticity00:58

Plasticity

Plasticity is the property where an object loses its elasticity and undergoes irreversible deformation, even after the deformation forces are eliminated. If a material deforms irreversibly without increasing stress or load, then this is called ideal plasticity. For example, when a force is applied to an aluminum rod, it changes its shape, but it does not return to its original shape once the force is removed. Plastic deformation or ductility is thus a permanent deformation or change in the...
Plastic Deformation in Circular Shafts01:20

Plastic Deformation in Circular Shafts

When materials are subjected to forces that surpass their yield strength, they undergo a process known as plastic deformation. This results in a permanent alteration or strain in their structure. This concept can be specifically applied to circular shafts, where the deformation leads to a change in its shape. The precise evaluation of this plastic deformation requires understanding the stress distribution within the circular shaft, which is achieved by calculating the maximum shearing stress in...
Plastic Behavior01:21

Plastic Behavior

A material's elastic behavior is characterized by the disappearance of stress once the load is removed, allowing the material to return to its original state. However, when stress surpasses the yield point, yielding commences, marking the onset of plastic deformation or permanent set. This change from elastic to plastic behavior is influenced by the peak stress value and the duration before the load is removed. An intriguing observation occurs when a specimen is loaded, unloaded, and reloaded.

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Related Experiment Video

Updated: Jun 1, 2026

Imaging Plasma Membrane Deformations With pTIRFM
12:28

Imaging Plasma Membrane Deformations With pTIRFM

Published on: April 2, 2014

Plastic deformations in complex plasmas.

C Durniak1, D Samsonov

  • 1Department of Electrical Engineering and Electronics, The University of Liverpool, Liverpool, L69 3GJ, United Kingdom. celine.durniak@liv.ac.uk

Physical Review Letters
|June 4, 2011
PubMed
Summary
This summary is machine-generated.

Plastic deformation in complex plasma crystals involves local shearing and heat generation. Shear slips create dislocation pairs that move at subsonic speeds, impacting material properties.

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Area of Science:

  • * Physics: Study of complex plasmas as model systems for condensed matter.
  • * Materials Science: Investigation of plastic deformation and lattice dynamics.

Background:

  • * Complex plasmas serve as macroscopic models for solid and liquid states.
  • * Understanding underdamped dynamics and wave phenomena in these systems is crucial.
  • * Previous research has explored wave phenomena and dynamics in complex plasmas.

Purpose of the Study:

  • * To investigate the plastic deformation of complex plasma crystals under slow uniaxial compression.
  • * To analyze the mechanisms of strain relaxation and associated phenomena.
  • * To characterize the behavior and generation of dislocations during deformation.

Main Methods:

  • * Experimental studies of complex plasma crystals.
  • * Numerical simulations of material behavior under compression.
  • * Analysis of lattice shearing, shear slips, and heat generation.

Main Results:

  • * Complex plasma crystals exhibit local shearing under uniaxial compression.
  • * Strain is relieved through shear slips, leading to uniform compression and heat.
  • * Shear slips generate pairs of dislocations moving at subsonic speeds.

Conclusions:

  • * Plastic deformation in complex plasmas is characterized by shear slips and dislocation generation.
  • * These findings provide insights into the fundamental mechanics of deformable media.
  • * The study contributes to understanding wave phenomena and dynamics in complex plasma systems.