An aircraft wing strut is made of an aluminum alloy (E = 72 GPa and Y = 300 MPa) and has t...

An aircraft wing strut is made of an aluminum alloy (E = 72 GPa and Y = 300 MPa) and has the extruded cross section shown in Figure P7.5. Strain gages, located at 55 mm and 75 mm below the top of the beam, measure axial strains of -0.00012 and 0.00080, respectively, at a section where the positive moment is Mx = 6.0 kN • m. Determine the maximum tensile and compressive flexural stresses in the beam cross section, the location of the neutral axis, and the moment of inertia of the cross section.

FIGURE P7.5