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  3. 2 the 4mm thick bar shown in the figure below...

Question: 2 the 4mm thick bar shown in the figure below...

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2. The 4-mm thick bar shown in the figure below is axially loaded with a constant force of 15 kN. The bar material has been heat treated and quenched to raise its strength (form martensite), but as a consequence has lost most of its ductility. It is desired to drill a hole through the center of the 40 mm face of the plate to allow a pin to pass through it. If the pin can be ф3 mm or ф6 mm, where will brittle failure (a crack) be most likely to occur: along the circumference of a ф3 mm hole, a ф6 mm hole, or at the 1 mm shoulder radius? Show your work. 1 mm rad 40 mm 34 mm15 kN

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