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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
Given: r= 0.4
t1 = 0.6 mm
α = 10°
VC = 2.5 m/s
tm = 25 µm
| tan φ = | = 0.4233 | |
| 1 − rsinα |
⇒ φ = 22.9°
| Shear strain rate = | |
| cos(φ − α) × tm |
| = | |
| cos12.9 × 25 × 10−6 |
= 1.0104 × 105/s
