A compound shaft consists of two pipe segments. Segment $(1)$ has an outside diameter of $186mm$ and a wall thickness of $10mm.$

Segment $(2)$ has an outside diameter of $158mm$ and a wall thickness of $16mm.$ The shaft is subjected to torques $T_B=44kN-m$

and $T_C=19kN-m,$ which act in the directions shown. Determine the maximum shear stress magnitude in segment $(1).$

$75\mathrm{.}3$MPa

$57\mathrm{.}3$MPa

$54\mathrm{.}1$MPa

$64\mathrm{.}1$MPa

$38\mathrm{.}3$MPa

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