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A hole of 40 mm diameter is pierced in a steel sheet of 4 mm thickness without shear on the tool. Shear strength of steel is 400 N/mm² and penetration is 25%. What is the expected percentage load reduction if a shear of 1 mm is provided on the punch?
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- 25.00
- 33.33
- 50.00
- 66.67
Correct Option: C
| F = | = | ||
| Pt + S | 0.25 × 4 + 1 |
| F = | ||
| 2 |
