For the following problem, unless noted otherwise, refer to Appendices F and/or G for nece...

For the following problem, unless noted otherwise, refer to Appendices F and/or G for necessary mechanical properties. Unless noted otherwise, assume gray cast iron, as appropriate.

A long, flat steel bar 13 mm thick and 120 mm wide has semicircular grooves as shown and carries a tensile load of 50 kN. Determine the maximum stress in the plate if

(a) r = 8 mm.

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(b) r = 21 mm.

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(c) r = 38 mm.

Problem