Q. An Si-O bond with a Young’s modulus of 9*1010Nm-1 have an elliptical crack of depth 7nm. The surface energy is 2.29 J. Estimate fracture stress for silica fiber. (Solved)
1. 4.32*109nm-1
2. 6.32*109nm-1
3. 5.2*109nm-1
4. 3*109nm-1
- a. 4.32*109nm-1
1. 4.32*109nm-1
2. 6.32*109nm-1
3. 5.2*109nm-1
4. 3*109nm-1