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Related Concept Videos

Impact01:30

Impact

Impact occurs when two bodies collide, leading to the application of impulsive forces between them. Analyzing impact mechanics involves considering two colliding particles moving along a line known as the line of impact, which passes through their centers and is perpendicular to the contact plane.
When particles with different initial velocities collide, they induce deformation by applying equal and opposite impulses. At the point of maximum deformation, the particles move together with...
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Precipitate Formation and Particle Size Control

In precipitation gravimetry, the precipitating agent should react specifically or selectively with the analyte. While a specific reagent reacts with the analyte alone, a selective reagent can react with a limited number of chemical species.
The obtained precipitate should be either a pure substance of known composition or easily converted to one by a simple process, such as ignition or drying. In addition, the precipitate should be insoluble and easily filterable. In general, filterability...
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In gravimetry, the precipitant is chosen carefully to obtain a pure solid that can be easily filtered. Common inorganic precipitants can be used to determine several cations and anions. In some cases, the formation of the same precipitate can be used to determine the cation and the anion. For example, the reaction of barium and chromate ions to give barium chromate is used to determine both barium and chromate. However, precipitates such as hydroxides, oxalates, and metal ammonium phosphates...
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Related Experiment Video

Updated: May 24, 2026

Visualization of Failure and the Associated Grain-Scale Mechanical Behavior of Granular Soils under Shear using Synchrotron X-Ray Micro-Tomography
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Visualization of Failure and the Associated Grain-Scale Mechanical Behavior of Granular Soils under Shear using Synchrotron X-Ray Micro-Tomography

Published on: September 29, 2019

Microstructure evolution during impact on granular matter.

L Kondic1, X Fang, W Losert

  • 1Department of Mathematical Sciences, New Jersey Institute of Technology, Newark, New Jersey 07102, USA.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|March 10, 2012
PubMed
Summary
This summary is machine-generated.

Granular material impact dynamics are significantly influenced by particle friction and polydispersity. Tangential forces and evolving force networks within the granular system are crucial for understanding intruder dynamics.

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Last Updated: May 24, 2026

Visualization of Failure and the Associated Grain-Scale Mechanical Behavior of Granular Soils under Shear using Synchrotron X-Ray Micro-Tomography
09:00

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Published on: September 29, 2019

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

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Processing of Bulk Nanocrystalline Metals at the US Army Research Laboratory
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Area of Science:

  • Physics
  • Materials Science
  • Computational Mechanics

Background:

  • Dense granular materials exhibit complex behaviors under external forces.
  • Understanding intruder dynamics is key to predicting material response in various applications.

Purpose of the Study:

  • To investigate the impact dynamics of an intruder in a dense granular material.
  • To analyze the influence of granular properties and system parameters on impact.
  • To explore the resulting force networks and particle dynamics within the granular system.

Main Methods:

  • Two-dimensional discrete element simulations were employed to model the impact process.
  • Systematic variation of intruder properties (size, shape, composition).
  • Systematic variation of granular properties (friction, polydispersity, order, elasticity) and system parameters (size, gravity).

Main Results:

  • Granular particle polydispersity, structural order, and friction critically affect intruder impact dynamics.
  • Tangential forces between particles play a vital role in impact mechanics.
  • Force network evolution and particle dynamics correlate with intruder motion.

Conclusions:

  • Frictional properties and polydispersity are dominant factors in granular impact phenomena.
  • The development and topological evolution of force networks significantly influence system response.
  • Granular system's internal dynamics, particularly tangential forces, are intrinsically linked to intruder behavior.