• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Simultaneous initiation of nitromethane in two holes by pulsed wire discharge for crack control of a concrete block

Research Project

Project/Area Number 18K04306
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 22010:Civil engineering material, execution and construction management-related
Research InstitutionKumamoto University

Principal Investigator

Tanaka Shigeru  熊本大学, 産業ナノマテリアル研究所, 助教 (70505859)

Co-Investigator(Kenkyū-buntansha) 山口 信  熊本大学, 大学院先端科学研究部(工), 助教 (80570746)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000)
Fiscal Year 2019: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2018: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Keywordsコンクリート / 動的破壊 / ニトロメタン / 爆燃 / 金属細線爆発 / パルス細線放電 / 酸化反応 / 高速度ビデオカメラ / 数値解析 / 衝撃波 / アーク放電 / 動的破断面制御 / パルス大電流 / 爆轟
Outline of Final Research Achievements

The technique to control the explosion reaction of nitromethane (NM) and to achieve the simultaneous initiation of several NM charges was developed by using the method of electric heating of NM through the metal thin wire. This technique was applied to the fracture of a concrete specimen, and the model experiment confirmed that the specimen could be split into arbitrary shapes. The numerical simulation of the fracture reproduced the final fracture shape of the model experiment. Furthermore, the numerical analysis revealed that the interference of stress waves generated from the loading hole generated the tensile stress field along the planned fracture surface. The deflagration reaction of NM is triggered by the heat of oxidation reaction of the light metal wire, and by adjusting the element and wire diameter of the metal thin wire, less electric energy is required to achieve the initiation of NM.

Academic Significance and Societal Importance of the Research Achievements

ニトロメタン(NM)は、火薬類取締法の制限を受けない液体の可燃物であるが、点火エネルギーによっては、爆発的な燃焼反応を開始する。本研究では、金属細線を介してNMを急速加熱し、直ちに爆燃反応を開始する条件を明らかにした。制御されたNMの爆燃反応をコンクリート供試体の破壊に応用し、それを任意の形状に分割する技術を開発した。本研究は、倒壊したコンクリート構造物に人命救助ルートを迅速に開く技術へ発展可能性を有している。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (5 results)

All 2020 2019 Other

All Int'l Joint Research (2 results) Journal Article (2 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (1 results) (of which Int'l Joint Research: 1 results)

  • [Int'l Joint Research] Novosibirsk state technical University(ロシア連邦)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] Novosibirsk state technical university(ロシア連邦)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Initiation of nitromethane deflagration promoted by the oxidation reaction of vaporized metal wire2020

    • Author(s)
      Tanaka Shigeru、Bataev Ivan、Inao Daisuke、Hokamoto Kazuyuki
    • Journal Title

      Applications in Energy and Combustion Science

      Volume: 1-4 Pages: 100005-100005

    • DOI

      10.1016/j.jaecs.2020.100005

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Simultaneous Initiation of Nitromethane in Two Holes by Pulsed Wire Discharge for Crack Control of a Concrete Block2020

    • Author(s)
      Shigeru Tanaka, Masatoshi Nishi, Makoto Yamaguchi, Ivan Bataev, Kazuyuki Hokamoto
    • Journal Title

      Journal of Dynamic Behavior of Materials volume

      Volume: 6 Issue: 1 Pages: 53-63

    • DOI

      10.1007/s40870-019-00227-6

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Simultaneous initiation of nitromethane in two holes by pulsed wire discharge for crack control of a concrete block2019

    • Author(s)
      田中 茂
    • Organizer
      sixth international symposium on explosion, shock wave and high-strain-rate phenomena
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research

URL: 

Published: 2018-04-23   Modified: 2022-01-27  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi