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Experimental investigation on the effect of wear flat inclination on the cutting response of a blunt tool in rock cutting
https://orcid.org/0000-0003-4298-9243
Abstract A vast majority of experimental researches focuses on the cutting action of a sharp cutter, while there has been limited experimental work devoted to the study of the contact process at the wear flat-rock interface. The specific objective of this study is to determine the effect of the wear flat inclination angle ($$\beta$$) with respect to the cutter velocity vector ($$\varvec{v}$$) on both the contact stress ($$\sigma$$) and friction coefficient ($$\mu$$) mobilized at the wear flat-rock interface. An extensive and comprehensive set of cutting experiments was carried out on thirteen different sedimentary quarry rock samples using a state-of-the-art rock cutting equipment. A unique cutter holder was purposely designed and manufactured along with a precise experimental protocol implemented in order to change the back rake angle and therefore the inclination $$\beta$$ by steps of $$0.10^{\circ }$$. The experimental observations confirm the existence of three regimes of frictional contact (identified as elastic, elasto-plastic and plastic) for all rock samples. Further, the results suggest that the scaled contact stress is predominantly controlled by a dimensionless number $$\eta =\frac{E^{*}\tan \beta }{q}$$ with $$E^{*}$$ the plane strain elastic modulus and q the rock strength.
Experimental investigation on the effect of wear flat inclination on the cutting response of a blunt tool in rock cutting
https://orcid.org/0000-0003-4298-9243
Abstract A vast majority of experimental researches focuses on the cutting action of a sharp cutter, while there has been limited experimental work devoted to the study of the contact process at the wear flat-rock interface. The specific objective of this study is to determine the effect of the wear flat inclination angle ($$\beta$$) with respect to the cutter velocity vector ($$\varvec{v}$$) on both the contact stress ($$\sigma$$) and friction coefficient ($$\mu$$) mobilized at the wear flat-rock interface. An extensive and comprehensive set of cutting experiments was carried out on thirteen different sedimentary quarry rock samples using a state-of-the-art rock cutting equipment. A unique cutter holder was purposely designed and manufactured along with a precise experimental protocol implemented in order to change the back rake angle and therefore the inclination $$\beta$$ by steps of $$0.10^{\circ }$$. The experimental observations confirm the existence of three regimes of frictional contact (identified as elastic, elasto-plastic and plastic) for all rock samples. Further, the results suggest that the scaled contact stress is predominantly controlled by a dimensionless number $$\eta =\frac{E^{*}\tan \beta }{q}$$ with $$E^{*}$$ the plane strain elastic modulus and q the rock strength.
Experimental investigation on the effect of wear flat inclination on the cutting response of a blunt tool in rock cutting
https://orcid.org/0000-0003-4298-9243
Abstract A vast majority of experimental researches focuses on the cutting action of a sharp cutter, while there has been limited experimental work devoted to the study of the contact process at the wear flat-rock interface. The specific objective of this study is to determine the effect of the wear flat inclination angle ($$\beta$$) with respect to the cutter velocity vector ($$\varvec{v}$$) on both the contact stress ($$\sigma$$) and friction coefficient ($$\mu$$) mobilized at the wear flat-rock interface. An extensive and comprehensive set of cutting experiments was carried out on thirteen different sedimentary quarry rock samples using a state-of-the-art rock cutting equipment. A unique cutter holder was purposely designed and manufactured along with a precise experimental protocol implemented in order to change the back rake angle and therefore the inclination $$\beta$$ by steps of $$0.10^{\circ }$$. The experimental observations confirm the existence of three regimes of frictional contact (identified as elastic, elasto-plastic and plastic) for all rock samples. Further, the results suggest that the scaled contact stress is predominantly controlled by a dimensionless number $$\eta =\frac{E^{*}\tan \beta }{q}$$ with $$E^{*}$$ the plane strain elastic modulus and q the rock strength.
Experimental investigation on the effect of wear flat inclination on the cutting response of a blunt tool in rock cutting
Rostamsowlat, Iman (author) / Richard, Thomas (author) / Evans, Brian (author)
Acta Geotechnica ; 14
2018
Article (Journal)
English
BKL:
56.20
Ingenieurgeologie, Bodenmechanik
/
56.20$jIngenieurgeologie$jBodenmechanik
DDC:
624.15105
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