Let the long beam in Problem 10.17 be made of an aluminum alloy (E = 72.0 GPa). Determine...

Let the long beam in Problem 10.17 be made of an aluminum alloy (E = 72.0 GPa). Determine the maximum flexural stress in the long beam and cross beams.

Problem 10.17

The beams in Figure P10.17 are steel I-beams (203 mm deep, Ix = 24.0 × 106 mm4 , and E = 200 GPa). If a load P = 90.0 kN is applied to the center of the long beam located over one of the cross beams, determine the maximum flexural stress in the long beam and cross beams.

FIGURE P10.17