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A composite beam is made of two brass [E = 99 GPa] plates bonded to an aluminum [E = 70 GPa] bar, as shown. The beam is subjected
to a bending moment of 1570 N-m acting about the z axis. If the moment of inertia about the z axis of the equivalent all-aluminum beam
is 690000 mm4, find the maximum bending stress in the aluminum plate.
Brass
Aluminum
Brass
20.5 MPa
O 31.6 MPa
O 24.3 MPa
34.1 MPa
O 28.9 MPa
50 mm
10 mm
30 mm
10 mm

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