The notched test sample shown below is $0\mathrm{.}30$ in $.$ thick. The dimensions are $a=25\mathrm{.}0in.,h=2\mathrm{.}50in.,$ and $d=1\mathrm{.}50in.$ Each notch is $0\mathrm{.}250$ in $.$ wide and the applied forces have magnitude $P=150lb.$

Determine the maximum bending stress developed in the bar.

Express your answer to three significant figures.

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${}_{\text{m}\text{a}\text{x}}=$

psi

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Part B $-$ Member with Two Fillets

The sample shown below is to be subjected to applied moments, as shown.

Find the maximum magnitude of the moments if $h_1=42mm,r_1=7mm,h_2=28mm,r_2=2\mathrm{.}1mm,h_3=7mm,t=25mm,$ and the maximum

allowable stress is ${}_{\text{a}\text{l}\text{l}\text{o}\text{w}}=260$MPa.

Express your answer to three significant figures and include the appropriate units.