A rectangular bar of mild steel has a yield point of Y = 276 MPa and a thickness of 7.0 mm...

A rectangular bar of mild steel has a yield point of Y = 276 MPa and a thickness of 7.0 mm. The bar is subjected to a tensile load P (Figure P14.13).

a. Determine the value of P that will first cause yielding at some point in the bar.

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b. Determine the value of P that will first cause a section of the bar to become fully plastic.

FIGURE P14.13