Size Effect on Surface Height and Aperture Distributions of a Fracture.
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- SAKAGUCHI Kiyotoshi
- Department of Geoscience and Technology, Graduate School of Engineering, Tohoku University
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- TOMONO Junya
- SOFTBRAIN Co., Ltd.
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- OKUMURA Kiyohiko
- Department of Mechanical Engineering, Sendai Digital Technical College
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- OGAWA Yasushi
- Komatsu Ltd.
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- MATSUKI Koji
- Department of Geoscience and Technology, Graduate School of Engineering, Tohoku University
Bibliographic Information
- Other Title
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- き裂表面形状と間隙の寸法効果
Abstract
Surface heights of a fracture about 1 m in length were measured by using a large measuring system with a laser type displacement transducer to clarify the size effect on surface height and aperture distributions of a fracture. Based on the measured data, the size effect on the standard deviation and mean aperture of the fracture was studied. The results are summarized as follows:1. Standard deviations of both surface height and initial aperture increased with an increase in the fracture size. However, standard deviation of the initial aperture did not increase as that of the surface height did.2. When the wavelength exceeded 100 mm, the power spectral density function of the initial aperture became constant. Moreover, the standard deviation of the aperture was estimated to become almost constant when the fracture size is greater than 1000 mm. On the other hand, the mean aperture is still increases at fracture size of 1000 mm. This is because a few sharp asperities are greatly influenced by a certain projected contacting point.
Journal
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- Journal of the Geothermal Research Society of Japan
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Journal of the Geothermal Research Society of Japan 24 (2), 149-160, 2002
THE GEOTHERMAL RESEARCH SOCIETY OF JAPAN
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Details 詳細情報について
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- CRID
- 1390001206129250944
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- NII Article ID
- 130003624324
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- ISSN
- 18835775
- 03886735
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- Text Lang
- ja
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- Data Source
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- JaLC
- CiNii Articles
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- Abstract License Flag
- Disallowed