Solution to Problem 320 Torsion

Problem 320
In Prob. 319, determine the ratio of lengths b/a so that each material will be stressed to its permissible limit. What torque T is required?

Solution 320



san galing po yung squared sa may 1000? LENGTH

Jhun Vert's picture

It is not from $L$, length gets cancelled from the equality. It is from $T$ which is in kN·m. Convert kN·m to N·mm. kN to N ×1000, and m to mm another ×1000.