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Question 1.34: A structural steel bar with a 25 mm × 75 mm rectangular cros...

A structural steel bar with a 25 mm × 75 mm rectangular cross section is subjected to an axial load of 150 kN. Determine the maximum normal and shear stresses in the bar.

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The maximum normal stress in the steel bar is

\sigma_{\max }=\frac{F}{A}=\frac{(150  kN )(1,000  N / kN )}{(25  mm )(75 mm )}=80  MPa

The maximum shear stress is one-half of the maximum normal stress

\tau_{\max }=\frac{\sigma_{\max }}{2}=40  MPa

 

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