Estimation of the dynamic fracture process of rock material utilizing high speed photography

Shiro Kubota, Woo Jin Jung, Yuji Ogata, Kazuo Aoki, Hideki Shimada, Kikuo Matsui

研究成果: ジャーナルへの寄稿Conference article

1 引用 (Scopus)

抄録

The experimental study is conducted to estimate fracture process of the cylindrical rock specimen. In this experiment, an explosive is used as the explosion source, and a pipe filled with water is arranged between the explosive and the cylindrical rock specimen. The main purpose of this fracture test is to collect the experimental data on the behaviors of the dynamic fracture of the rock. In addition, one of the aims of this test is to estimate the dynamic tensile strength of the rock in wide range of strain rate utilizing Hopkinson's effect. Therefore, During the fracture process of the rock, the free surface velocity and the fracture part near the free surface were observed by a laser vibration meter and high speed camera. The precise detonator was used to control the initiation time of the explosive by using an accurately controlled blasting machine. The results of the fracture test for Kimachi sandstone and the validity of this test are discussed. In order to understand the relationship above fracture condition and the incident underwater shock wave into the rock specimen, the numerical simulation is carried out. The 2D hydrodynamic code based on ALE finite difference scheme is employed. In the case of the fracture test with 50mm water pipe, the incident underwater shock wave into the cylindrical rock specimen has irregular pressure distribution near the shock front.

元の言語英語
ページ(範囲)757-762
ページ数6
ジャーナルProceedings of SPIE - The International Society for Optical Engineering
4948
DOI
出版物ステータス出版済み - 12 1 2002
イベントPROCEEDINGS SPIE - The International Society for Optical Engineering: 25th International Congress on High-Speed Photography and Photonics - Beaune, フランス
継続期間: 9 29 200210 4 2002

Fingerprint

High-speed Photography
Dynamic Fracture
High speed photography
high speed photography
Rocks
rocks
Shock Waves
Free Surface
Shock waves
shock waves
detonators
Water
Pipe
High-speed Camera
Tensile Strength
Pressure Distribution
Strain Rate
vibration meters
high speed cameras
High speed cameras

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

これを引用

Estimation of the dynamic fracture process of rock material utilizing high speed photography. / Kubota, Shiro; Jung, Woo Jin; Ogata, Yuji; Aoki, Kazuo; Shimada, Hideki; Matsui, Kikuo.

:: Proceedings of SPIE - The International Society for Optical Engineering, 巻 4948, 01.12.2002, p. 757-762.

研究成果: ジャーナルへの寄稿Conference article

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