A rod is made from two segments: $AB$ is steel and $BC$ is brass. It is fixed

at its ends and subjected to a torque of $T=680N*m.$ The steel portion

has a diameter of $50$ mm $($Figure $1)$

Part A

Determine the required diameter of the brass portion so the reactions at the walls will be the same. Take $G_{st}=75$GPa,$G_{br}=39$GPa.

Express your answer to three significant figures and include the appropriate units.

$d_{\text{b}\text{r}\text{a}\text{s}\text{s}}=,-$

Request Answer

Figure