Shear Strain Undergone by Chip

Q. In a machining operation the chip thickness ratio is $0.3$ and the back rake angle of the tool is ${10}^o$. What is the value of the shear strain?

1. $0.31$
2. $0.13$
3. $3.00$
4. $3.34$

Q. In an orthogonal metal cutting process are given below

Chip thickness = 0.8 mm
Undeformed thickness = 0.6 mm
Rake angle = ${15}^o$
Cutting speed = 2.5 m/s

Mean thickness of primary shear zone 25 microns then the shear strain rate is $\left(s^{-1}\right)$ during the process is

1. $1.0636\times {10}^5$
2. $1.0736\times {10}^5$
3. $1.0836\times {10}^5$
4. $1.0936\times {10}^5$

Q. In an orthogonal metal cutting process are given below

Chip thickness = 0.8 mm
Undeformed thickness = 0.6 mm
Rake angle = ${15}^o$
Cutting speed = 2.5 m/s

Mean thickness of primary shear zone 25 microns then the shear strain rate is $\left(s^{-1}\right)$ during the process is

1. $1.0636\times {10}^5$
2. $1.0736\times {10}^5$
3. $1.0836\times {10}^5$
4. $1.0936\times {10}^5$

Q. The following observations were made during orthogonal cutting of brass tube on a lathe

width of cut = 0.45 cm

cutting speed = 7.5 m/min

Rake angle $={20}^o$

uncut chip thickness = 0.21 mm

chip thickness = 0.60 mm


Then the induced shear strain is ___

1. 2.685