Experimental studies of the resultant contact forces in drillbit-rock interaction

Olusegun Kolawole Ajibose (Corresponding Author), Marian Wiercigroch, Alfred Rotimi Akisanya

Research output: Contribution to journalArticle

13 Citations (Scopus)
51 Downloads (Pure)

Abstract

The understanding of drillbit–rock interaction is essential to the optimisation of the percussive drilling technology. It is obvious that rock fragments mainly as a result of the contact forces developed during impacts. In addition, the modelling of the dynamic response of a drilling module is possible if the contact law can be described in terms of the force and penetration. In this paper, the resultant contact force versus penetration is examined for a drillbit with conical and spherical inserts in contact with a rock. Quasi-static indentation and dynamic impact experiments are conducted on sandstone, granite and basalt. A power-law relationship is obtained between the measured resultant contact force and the penetration. The relationship is in good agreement with existing theoretical results for elastic-ideally plastic solids.
Original languageEnglish
Pages (from-to)3-11
Number of pages9
JournalInternational Journal of Mechanical Sciences
Volume91
Early online date29 Oct 2014
DOIs
Publication statusPublished - Feb 2015

Fingerprint

Drilling
Rocks
rocks
Die casting inserts
Basalt
penetration
Granite
Sandstone
drilling
Indentation
Dynamic response
interactions
Plastics
sandstones
granite
inserts
dynamic response
indentation
basalt
plastics

Keywords

  • drilling
  • impacts
  • elastic-plastic
  • indentation
  • rock

Cite this

Experimental studies of the resultant contact forces in drillbit-rock interaction. / Ajibose, Olusegun Kolawole (Corresponding Author); Wiercigroch, Marian; Akisanya, Alfred Rotimi.

In: International Journal of Mechanical Sciences, Vol. 91, 02.2015, p. 3-11.

Research output: Contribution to journalArticle

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