Question

FIGURE 8.13 Reduction in endurance limit Tensile strength \( S_{u} \) (ksi) owing to surface finish-steel parts; i.e., surface factor versus tensile strength for \begin{tabular}{|ccccccccc} \hline & & & & & & & \\ 0.4 & 0.6 & 0.8 & 1.0 & 1.2 & 1.4 & 1.6 & 1.8 \\ & & & \( s_{u}(\mathrm{GPa}) \) & & & & \end{tabular}

          FIGURE 8.13
Reduction in endurance limit Tensile strength \( S_{u} \) (ksi)
owing to surface finish-steel
parts; i.e., surface factor
versus tensile strength for
\begin{tabular}{|ccccccccc}
\hline & & & & & & & \\
0.4 & 0.6 & 0.8 & 1.0 & 1.2 & 1.4 & 1.6 & 1.8 \\
& & & \( s_{u}(\mathrm{GPa}) \) & & & &
\end{tabular}

FIGURE 8.13
Reduction in endurance limit Tensile strength Su (ksi)
owing to surface finish-steel
parts; i.e., surface factor
versus tensile strength for

0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8

su(GPa)

Added by Connie N.

Materials Science and Engineering

William D. Callister, David G. Rethwisch 9th Edition

Chapter 7

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Solved by Expert Penny Riley

Step 1

From the given data, Su = 930 MPa. Referring to the given table, we can interpolate the surface factor (kf) for a fine-ground or commercially polished surface. For Su = 0.8 GPa (800 MPa), kf = 1.0 For Su = 1.0 GPa (1000 MPa), kf = 0.9 Using linear interpolation, Show more…

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The shaft located at E, between the finishing station and the rotary cutter, has a fine-ground or commercially polished surface Estimate the 2 x 105 fatigue strength for the 11-mm-diameter reversed axially loaded steel shaft having Su = 930 MPa, and Sy = 600 MPa. Take CG = 0.75. Submit your answer in MPa and include the S-N curve on log-log coordinates in your solution.