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Details pertaining to an orthogonal metal cutting process are given below:
Chip thickness ratio 0.4
Undeformed thickness 0.6 mm
Rake angle +10° Cutting speed 2.5 m/s
Mean thickness of primary shear zone 25 microns
The shear strain rate in s-1 during the process is
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- 0.1781 × 105
- 0.7754 × 105
- 1.0104 × 105
- 4.397 × 105
Correct Option: C
r = 0.4 t1 = 0.6 ∝ 10° V = 2.5 m/s
tm = 0.025
| φ = tan-1 |  |  | ; φ = tan-1 | | | ||
| 1 - r sin ∝ | 1 - 0.4 sin 10 |
φ = 22.94
| = | . | ||
| cos(φ - ∝) | tm |
| = | × | = 1.01.4 × 105/s | ||
| cos(22.94 - 10) | 0.025 |
