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Problem $03\mathrm{.}019-$ Torques and shearing stresses in a variable diameter solid composite shaft $-$

DEPENDENT MULTI$-$PART PROBLEM $-$ ASSIGN ALL PARTS

Shaft $AB$ is made of a steel with an allowable shearing stress of $90$ MPa $,$ and shaft $BC$ is made of an aluminum with an

allowable shearing stress of $70$ MPa $.$ Know that the diameter of shaft $BC$ is $50$ mm $.$

NOTE: This is a multi$-$part question. Once an answer is submitted, you will be unable to return to this part.

Problem $03\mathrm{.}019.$a $-$ Torques and shearing stresses in a variable diameter solid composite shaft

Neglecting the effect of stress concentrations, determine the largest torque $T$ that can be applied at $A$ if the allowable stress is not to

be exceeded in shaft $BC.$

The largest torque $T$ that can be applied at $A$ is

$kN*m.$