Dynamic tensile experiment of rock using underwater shock wave

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

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

抄録

In order to promote blasting efficiency and to establish effective blasting demolition techniques, it is important to know the mechanism of the dynamic fracture process on rock or construction materials. We proposed a new technique to estimate the dynamic fracture process of the cylindrical rock specimen. In this technique the explosive is used as the explosion source, and a pipe filled with water is arranged between the explosive and the cylindrical rock specimen. The strength of incident underwater shock wave is adjusted by changing the length of the water pipe. The main purpose of this test is to collect the experimental data on the behaviors of dynamic fracture of the rock. We would like to provide these experimental data, which can confirm the validities of the related numerical simulations or fracture models for the rock materials. In addition, one of the aims of this test is to estimate the dynamic tensile strength of the rock for a wide range of the strain rate utilizing Hopkinson's effect. The free surface velocity at the end of rock specimen and the position of cracks on the rock surface are observed by using a laser vibration meter and high-speed camera, respectively. The behavior of the underwater shock wave that is generated by underwater explosion of explosive is also estimated by numerical simulation. We will discuss the validity of this test based on the experimental and numerical results.

本文言語英語
ホスト出版物のタイトルExplosion, Shock Wave and Hypervelocity Phenomena in Materials
編集者Shigeru Itoh, K. Hokamoto, Masahiro Fujita
出版社Trans Tech Publications Ltd
ページ367-372
ページ数6
ISBN(印刷版)9780878499502
DOI
出版ステータス出版済み - 1 1 2004
イベントProceedings of the 1st International Symposium on Explosion, Shock Wave and Hypervelocity Phenomena (ESHP Symposium) - Kumamoto, 日本
継続期間: 3 15 20043 17 2004

出版物シリーズ

名前Materials Science Forum
465-466
ISSN(印刷版)0255-5476
ISSN(電子版)1662-9752

その他

その他Proceedings of the 1st International Symposium on Explosion, Shock Wave and Hypervelocity Phenomena (ESHP Symposium)
Country日本
CityKumamoto
Period3/15/043/17/04

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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