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Related Concept Videos

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Whether solid, liquid, or gas, a substance's state depends on the order and arrangement of its particles (atoms, molecules, or ions). Particles in the solid pack closely together, generally in a pattern. The particles vibrate about their fixed positions but do not move or squeeze past their neighbors. In liquids, although the particles are closely spaced, they are randomly arranged. The position of the particles are not fixed—that is, they are free to move past their neighbors to occupy...
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Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets
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Published on: May 15, 2017

Stress-driven phase transformation and the roughening of solid-solid interfaces.

L Angheluta1, E Jettestuen, J Mathiesen

  • 1Physics of Geological Processes, University of Oslo, Oslo, Norway.

Physical Review Letters
|March 21, 2008
PubMed
Summary
This summary is machine-generated.

We developed a solid-solid phase transformation model explaining interface roughening in porous materials under compression. This model clarifies the formation of fingerlike structures observed in sedimentary rock compaction.

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Last Updated: Jul 6, 2026

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Area of Science:

  • Geophysics
  • Materials Science
  • Solid Mechanics

Background:

  • Multiphase solid-liquid systems subjected to stress commonly exhibit morphological instabilities.
  • Stylolites, irregular interfaces in compacted sedimentary rocks, display roughening perpendicular to compaction direction.

Purpose of the Study:

  • To propose a solid-solid phase transformation model for interface roughening instability.
  • To explain the formation of fingerlike structures in porous materials under compression.

Main Methods:

  • Development of a theoretical model for solid-solid phase transformation.
  • Analysis of interface instability driven by free energy density jumps.
  • Modeling of normal compression stresses on porous materials with differing porosities.

Main Results:

  • The model predicts roughening instability triggered by a finite jump in free energy density across the interface.
  • Fingerlike structures form, aligned with the principal direction of compaction.
  • The model provides a mechanism for stylolite formation during sedimentary rock compaction.

Conclusions:

  • The proposed model successfully explains the observed roughening instability and fingerlike structures in porous materials under compression.
  • This work offers a new perspective on the geological processes leading to stylolite formation.