In a plane strain cutting process, it is found that the coefficient of friction µ (Coulomb) along the tool-chip contact is 1 and independent of the tool rake angle a. When the forces on the tool were measured for a > 0, it was found that at some positive a*, the thrust (or feed) force reversed direction from that recorded at a = 0. Find the value of a* (Note: Do not assume any shear angle relationship etc.). If the Merchant shear angle relationship were to apply, then is there some rake angle or set of rake angles (positive or negative) for which cutting will cease to occur. Justify/explain with a calculation.
In a plane strain cutting process, it is found that the coefficient of friction µ (Coulomb) along the tool-chip contact is 1 and independent of the tool rake angle a. When the forces on the tool were measured for a > 0, it was found that at some positive a*, the thrust (or feed) force reversed direction from that recorded at a = 0. Find the value of a* (Note: Do not assume any shear angle relationship etc.). If the Merchant shear angle relationship were to apply, then is there some rake angle or set of rake angles (positive or negative) for which cutting will cease to occur. Justify/explain with a calculation.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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In a plane strain cutting process, it is found that the coefficient of friction µ (Coulomb) along the tool-chip contact is 1 and independent of the tool rake angle a. When the forces on the tool were measured for a > 0, it was found that at some positive a*, the thrust (or feed) force reversed direction from that recorded at a = 0. Find the value of a* (Note: Do not assume any shear angle relationship etc.). If the Merchant shear angle relationship were to apply, then is there some rake angle or set of rake angles (positive or negative) for which cutting will cease to occur. Justify/explain with a calculation.
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