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Method for determin...
Method for determination of in-hole dynamic force-penetration data from two-point strain measurement on a percussive drill rod
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- Carlsson, J. (författare)
- Luleå tekniska universitet
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- Sundin, Karl-Gustaf (författare)
- Luleå tekniska universitet,Material- och solidmekanik
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- Lundberg, Bengt (författare)
- Luleå tekniska universitet
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(creator_code:org_t)
- 1990
- 1990
- Engelska.
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Ingår i: International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts. - 0148-9062 .- 1879-2073. ; 27:6, s. 553-558
- Relaterad länk:
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https://urn.kb.se/re...
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visa fler...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Teknisk mekanik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Applied Mechanics (hsv//eng)
Nyckelord
- Hållfasthetslära
- Solid Mechanics
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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