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A hollow circular shaft of inner radius 10 mm outer radius 20 mm and length 1 m is to be used as a torsional spring. If the shear modulus of the material of the shaft is 150 GPa, the torsional stiffness of the shaft (in kN-m/rad) is ______ (correct to two decimal places).
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- 35.34
- 33.34
- 34.34
- 32.34
Correct Option: A
35.34 KN- m/rad
G = 1504 Pa
| = | ||||
| θ | I |
| = | = | × | × (0.044 - 0.024) | |||
| θ | 1 | 32 |
| = 35.34 | θ |
