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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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Stress Distribution During Cold Compression of Rocks and Mineral Aggregates Using Synchrotron-based X-Ray Diffraction
Cecilia S N Cheung1, Donald J Weidner2, Li Li2
1Mineral Physics Institute, Department of Geoscience, Stony Brook University; Geological Engineering, Department of Civil and Environmental Engineering, University of Wisconsin-Madison; scheung9@wisc.edu.
Journal of Visualized Experiments : Jove
|June 5, 2018
Summary
This study details compression experiments on rocks and minerals using a multi-anvil apparatus and synchrotron X-rays. The method quantifies stress distribution in geomaterials, advancing understanding of compaction mechanisms.
Area of Science:
- Geophysics
- Material Science
- Mineral Physics
Background:
- Understanding rock and mineral compaction is crucial for various scientific and engineering fields.
- Previous methods for studying compactive processes have limitations in quantifying stress distribution.
Purpose of the Study:
- To present detailed procedures for compression experiments on rocks and mineral aggregates.
- To enable quantification of stress distribution within geomaterials during compaction.
Main Methods:
- Utilized a multi-anvil deformation apparatus (D-DIA) coupled with synchrotron X-radiation.
- Employed X-ray transparent sintered diamond and tungsten carbide anvils within a hydraulic press.
- Analyzed energy dispersive or two-dimensional diffraction patterns to derive lattice spacings, elastic strains, and stress.
Main Results:
- Developed a method to precisely measure sample length changes, enabling direct volume strain measurement.
- Quantified two-dimensional stress distribution within geomaterials.
- Established a link between experimental procedures and understanding compaction mechanisms.
Conclusions:
- The described experimental approach allows for detailed analysis of stress distribution during material compression.
- This technique significantly enhances the understanding of compactive processes in geomaterials.
- Findings have broad implications for rock mechanics, geotechnical engineering, and material science.
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