R$2\mathrm{.}1$

A shaft is loaded as shown in Fig R$2\mathrm{.}1.$ The fillet is a full quartercircular fillet.

Given that:

$D_2=12\mathrm{.}5mm$ and $T=57\mathrm{.}5Nm.$

Calculate the maximum shear stress ${}_{\text{m}\text{a}\text{x}}$ at the stress concentration section for values of $D_1=9,10,$ and $11$ mm $.$

Fig R$2\mathrm{.}1$: A bar with fillet under load.