$!$

Required information

A rectangular bar is cut from an AISI $1020$ cold$-$drawn steel flat. The bar is $2\mathrm{.}500$ in wide by $\frac{4}{8}$ in thick and

has a $0\mathrm{.}500-$ in$-$dia. hole drilled through the center as depicted in Table A$-15-1.$ The bar is concentrically

loaded in push$-$pull fatigue by axial forces $F_a,$ uniformly distributed across the width. Using a design factor

of $n_d=2,$ estimate the largest force $F_a$ that can be applied ignoring column action.

Determine the endurance limit for this material as well as the value after correction for surface finish, sizing, and loading.

The endurance limit for the material is

kpsi.

The endurance limit after correction is

kpsi.