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Method for determination of in-hole dynamic force-penetration data from two-point strain measurement on a percussive drill rod
Luleå tekniska universitet.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mechanics of Solid Materials.
Luleå tekniska universitet.
1990 (English)In: International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, ISSN 0148-9062, E-ISSN 1879-2073, Vol. 27, no 6, p. 553-558Article in journal (Refereed) Published
Abstract [en]

The aim of the present investigation is to establish a testing method suited for determination of in-hole dynamic force-penetration data for non-uniform standard percussive drill rod-bit configurations. The method is based on a version of the method of two-point strain measurement, which permits non-uniform rods, i.e. rods with variable characteristic impedance. This version allows normal force and particle velocity to be evaluated at an arbitrary cross-section of a homogenous non-uniform elastic rod from strain measurements performed at two different cross-sections of the same rod. The main problem of this investigation is to assess whether the influence of threads can be considered insignificant. As a part of the study force-penetration relationships have been determined for the penetration of a standard Sandvik Rock Tools button bit into Swedish Bohus granite.

Place, publisher, year, edition, pages
1990. Vol. 27, no 6, p. 553-558
National Category
Applied Mechanics
Research subject
Solid Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-3777DOI: 10.1016/0148-9062(90)91006-SISI: A1990EK41400009Scopus ID: 2-s2.0-0025643772Local ID: 19bc9a10-a557-11db-8975-000ea68e967bOAI: oai:DiVA.org:ltu-3777DiVA, id: diva2:976638
Note
Godkänd; 1990; 20070111 (cira)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Sundin, Karl-Gustaf

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Citation style
  • apa
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  • ieee
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  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
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Output format
  • html
  • text
  • asciidoc
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