Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Determination of Internal Friction Angle of Rocks Using Scratch Test with a Blunt PDC Cutter
https://orcid.org/0000-0003-4298-9243
Abstract The current paper is prepared with the objective of providing experimental evidence that the internal friction angle of rocks can be assessed using a scratch test with a blunt polycrystalline diamond compact (PDC) cutter. For this purpose, a comprehensive set of cutting experiments was carried out to determine the wear flat-rock friction coefficient in two limestones and one coarse-grained sandstone using state-of-the-art scratch based rock cutting equipment. Additional triaxial compression (TC) experiments were conducted on specimens of these rock formations, and a Coulomb failure analysis was conducted to independently estimate the internal friction coefficient of each specimen. The experimental results indicate that the value of internal friction angle (intrinsic rock property) derived from TC experiments is related to the apparent friction angle at the wear flat-rock interface of the blunt PDC cutter when the wear flat surface is inclined at inclination angles ranging between $$0^{\circ }$$ to $$1^{\circ }$$. Further, new results on one rock specimen were obtained by performing novel scratch tests with blunt PDC cutters with different wear flat properties, showing that the apparent friction angle at the wear flat-rock interface of a blunt cutting tool is significantly affected by the wear flat roughness and the wear flat material properties.
Highlights A new method was introduced to measure the internal friction angle of rock samples using rock cutting/drilling data.An extensive set of cutting experiments was conducted using different PDC blunt/worn cutters.The internal friction angle of rock specimens were obtained using triaxial compressrion (TC) tests.The internal friction angles of rock specimens were related to the apparent friction angles at the wear flat-rock interface when the wear flat surface is parallel to the rock free surafce.The wear flat properties of the PDC cutters have a significant effect on the apparent friction angle.
Determination of Internal Friction Angle of Rocks Using Scratch Test with a Blunt PDC Cutter
https://orcid.org/0000-0003-4298-9243
Abstract The current paper is prepared with the objective of providing experimental evidence that the internal friction angle of rocks can be assessed using a scratch test with a blunt polycrystalline diamond compact (PDC) cutter. For this purpose, a comprehensive set of cutting experiments was carried out to determine the wear flat-rock friction coefficient in two limestones and one coarse-grained sandstone using state-of-the-art scratch based rock cutting equipment. Additional triaxial compression (TC) experiments were conducted on specimens of these rock formations, and a Coulomb failure analysis was conducted to independently estimate the internal friction coefficient of each specimen. The experimental results indicate that the value of internal friction angle (intrinsic rock property) derived from TC experiments is related to the apparent friction angle at the wear flat-rock interface of the blunt PDC cutter when the wear flat surface is inclined at inclination angles ranging between $$0^{\circ }$$ to $$1^{\circ }$$. Further, new results on one rock specimen were obtained by performing novel scratch tests with blunt PDC cutters with different wear flat properties, showing that the apparent friction angle at the wear flat-rock interface of a blunt cutting tool is significantly affected by the wear flat roughness and the wear flat material properties.
Highlights A new method was introduced to measure the internal friction angle of rock samples using rock cutting/drilling data.An extensive set of cutting experiments was conducted using different PDC blunt/worn cutters.The internal friction angle of rock specimens were obtained using triaxial compressrion (TC) tests.The internal friction angles of rock specimens were related to the apparent friction angles at the wear flat-rock interface when the wear flat surface is parallel to the rock free surafce.The wear flat properties of the PDC cutters have a significant effect on the apparent friction angle.
Determination of Internal Friction Angle of Rocks Using Scratch Test with a Blunt PDC Cutter
https://orcid.org/0000-0003-4298-9243
Abstract The current paper is prepared with the objective of providing experimental evidence that the internal friction angle of rocks can be assessed using a scratch test with a blunt polycrystalline diamond compact (PDC) cutter. For this purpose, a comprehensive set of cutting experiments was carried out to determine the wear flat-rock friction coefficient in two limestones and one coarse-grained sandstone using state-of-the-art scratch based rock cutting equipment. Additional triaxial compression (TC) experiments were conducted on specimens of these rock formations, and a Coulomb failure analysis was conducted to independently estimate the internal friction coefficient of each specimen. The experimental results indicate that the value of internal friction angle (intrinsic rock property) derived from TC experiments is related to the apparent friction angle at the wear flat-rock interface of the blunt PDC cutter when the wear flat surface is inclined at inclination angles ranging between $$0^{\circ }$$ to $$1^{\circ }$$. Further, new results on one rock specimen were obtained by performing novel scratch tests with blunt PDC cutters with different wear flat properties, showing that the apparent friction angle at the wear flat-rock interface of a blunt cutting tool is significantly affected by the wear flat roughness and the wear flat material properties.
Highlights A new method was introduced to measure the internal friction angle of rock samples using rock cutting/drilling data.An extensive set of cutting experiments was conducted using different PDC blunt/worn cutters.The internal friction angle of rock specimens were obtained using triaxial compressrion (TC) tests.The internal friction angles of rock specimens were related to the apparent friction angles at the wear flat-rock interface when the wear flat surface is parallel to the rock free surafce.The wear flat properties of the PDC cutters have a significant effect on the apparent friction angle.
Determination of Internal Friction Angle of Rocks Using Scratch Test with a Blunt PDC Cutter
Rostamsowlat, Iman (Autor:in) / Evans, Brian (Autor:in) / Sarout, Joel (Autor:in) / Rostami, Jamal (Autor:in) / Kwon, Hyock-Ju (Autor:in)
2022
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
BKL:
38.58
Geomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
/
38.58$jGeomechanik
/
56.20$jIngenieurgeologie$jBodenmechanik
RVK:
ELIB41
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Estimating mode II fracture energy of rocks using the scratch test and phase field modeling
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