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Updated: Jun 26, 2025
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Stress Distribution During Cold Compression of Rocks and Mineral Aggregates Using Synchrotron-based X-Ray Diffraction
Published on: May 20, 2018
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Universal stress correlations in crystalline and amorphous packings
Roshan Maharana1, Debankur Das2, Pinaki Chaudhuri3
1Tata Institute of Fundamental Research, Hyderabad 500107, India.
Physical Review. E
|May 17, 2024
Summary
Stress correlations in disordered particle systems are surprisingly universal across various structures and potentials. These findings reveal insights into the amorphization transition and material properties.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Statistical Mechanics
Background:
- Understanding the mechanical properties of disordered materials is crucial.
- Stress correlations play a key role in material behavior under load.
- Athermal systems, lacking thermal fluctuations, offer a simplified model for studying fundamental properties.
Purpose of the Study:
- To establish a universal characterization of stress correlations in athermal systems.
- To investigate how stress correlations vary across crystalline to amorphous packings.
- To explore the behavior of stress correlations during the amorphization transition.
Main Methods:
- Numerical analysis of static configurations of particles.
- Simulation of systems with harmonic and Lennard-Jones potentials.
- Examination of various preparation protocols and levels of microscopic disorder.
Main Results:
- Stress correlations exhibit surprising universality at large lengthscales, independent of structural or orientational order.
- Exact results for near-crystalline systems provide accurate large-lengthscale predictions even in amorphous phases.
- Stress fluctuations reveal the loss of short-range structural periodicity during amorphization.
Conclusions:
- A universal framework for stress correlations exists in athermal systems.
- Stress correlations offer a powerful tool for understanding material properties and transitions.
- The study provides fundamental insights into the mechanics of disordered matter.
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