-
Consider an elastic straight beam of length L = 10 πm, with square cross-section of side a = 5 mm, and Young’s modulus E = 200 GPa. This straight beam was bent in such a way that the two ends meet, to form a circle of mean radius R. Assuming that Euler-Bernoulli beam theory is applicable t o this bending problem, the maximum tensile bending stress in the bent beam is ______ MPa.
-
- 102 MPa
- 100 MPa
- 101 MPa
- 99 MPa
Correct Option: B
By bending equation,
| = | = | |||
| y | I | R |
| σ = | ||
| R |
| = | = 100 MPa | |
| 5 |
