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Updated: Jul 19, 2026
06:07
Studying Large Amplitude Oscillatory Shear Response of Soft Materials
Published on: April 25, 2019
Oscillatory ductile compaction dynamics in a cylinder.
Lina Uri1, Dag Kristian Dysthe, Jens Feder
1Physics of Geological Processes, University of Oslo, P.O. Box 1048 Blindern, N-0316 Oslo, Norway. l.l.uri@fys.uio.no
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|October 10, 2006
Summary
Researchers observed surprising weight oscillations in ductile compaction experiments. These oscillations, linked to grain-wall contacts, persisted for the week-long study.
Area of Science:
- Physics
- Materials Science
- Geophysics
Background:
- Ductile compaction is prevalent in natural systems like granular materials and geological formations.
- The temporal evolution and dynamic behavior of ductile compaction are not well understood.
- Understanding these processes is crucial for modeling natural phenomena and material behavior.
Purpose of the Study:
- To investigate the temporal evolution of ductile compaction in a granular system.
- To identify and characterize unexpected dynamic behaviors during self-compaction.
- To explore the relationship between weight oscillations, strain, and grain-wall contacts.
Main Methods:
- Conducting a long-term experiment (one week) on a self-compacting ensemble of ductile grains.
- Measuring the weight at the bottom of the granular system over time.
- Monitoring grain-wall contacts and strain evolution throughout the experiment.
Main Results:
- Observed surprising oscillations in the measured weight at the base of the granular ensemble.
- These oscillations developed within the first ten hours and persisted throughout the experiment.
- Weight oscillations were found to be directly correlated with strain evolution and grain-wall contact dynamics.
Conclusions:
- The study reveals unexpected temporal dynamics in ductile compaction, characterized by persistent weight oscillations.
- Grain-wall contact mechanics play a critical role in driving these observed oscillations.
- Further research is needed to fully elucidate the underlying mechanisms responsible for the weight oscillations.
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