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The rigid beam is supported by the three suspender bars. Bars AB and EF are made of aluminum and bar CD is made of steel. If each bar has a cross-sectional area of 450 mm2, determine the maximum value of P if the allowable stress is (σallow)st =200 MPa for the steel and (σallow)al = 150 MPa for the aluminum. Est= 200 GPa, Eal = 70 GPa.
Prob. 4–44
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