2002 Fiscal Year Final Research Report Summary
A many body disk model of slip phenomena and self-organized criticality
| Project/Area Number |
12640370
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
物性一般(含基礎論)
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| Research Institution | Fukui University |
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Principal Investigator |
HIRATA Takayuki Department of Electrial Engineering, professor, 工学部, 教授 (20202278)
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| Co-Investigator(Kenkyū-buntansha) |
OGAWA Atsushi Department of Electrial Engineering, speaker, 工学部, 講師 (70242584)
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| Project Period (FY) |
2000 – 2002
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| Keywords | Slip phenomena / friction / self-organized criticality / many body disks / frustration / 1 / f fluctuation / stick slip / earthquake |
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| Research Abstract |
We have investigated a many-body disk model of slip phenomena. In the many-body disk model of slip phenomena, the particles between the slip surfaces are modeled as a many-body disks in 2 dimension. The model experiments of the many-body disk model of slip phenomena have been carried out. The experiments demonstrated that the model could reproduce the stick-slip events that were typical phenomena in slip. We showed that the time series of the torque has 1/f fluctuation. We also showed that the size distribution of stick-slip events obeyed the power law. The experiments were carried out with changing the number of disk layers and packing fractions. As a result, the model showed scaling properties in time, space and magnitude dimensions. This indicates that the many-body disk model of slip phenomena is one of the typical example of self-organized criticality.
The stress measurement system by photo-elasticity was developed in order to monitor the stress distribution in a many body disk system. By using the stress measurement system, dynamical change of stress distribution during the experiment of the many-body disk model of slip phenomena was investigated. We found the relation between the time series of the torque and local behavior of disks.
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Research Products
(12 results)
