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Feed force of 210Kg and cutting force of 310Kg are applied using a tool of rake angle 10 degrees. If chip thickness ratio is 0.36, what will be the value of a coefficient of friction?

Feed force of 210Kg and cutting force of 310Kg are applied using a tool of rake angle 10 degrees. If chip thickness ratio is 0.36, what will be the value of a coefficient of friction? Correct Answer .97

tan (shear angle)= (r*cos(rake angle))/ (1-r*sin(rake angle)). Use merchant circle diagram to find coefficient of friction.

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