Name:_______________
2-27-2015
ME2570. Mechanics of Materials – TEST No. 2
1. Three bars each made of different materials are
connected together and placed between two
walls when the temperature is T1 = 12oC.
Determine the force exerted on the rigid
supports when the temperature becomes T2 =
18oC. (30 pts.)
ME2570 Mechanics of Materials. 2nd Test
2–27–2015
2. The shaft is made of A–36 steel (G = 75 GPa) and has a
diameter of 80 mm. If the shaft is fixed at A and B determine the
reactions at A and B when the torques are applied to B and C as
shown. (35 pts)
ME2570 Mechanics of Materials. 2nd Test
2
2–27–2015
3. The two pipes are made of the same material and
connected as shown. If the cross–section area of BC is A
and that of CD is 2A. Determine the reactions at B and D
when a force P is applied at the junction C.
ME2570 Mechanics of Materials. 2nd Test
3
2–27–2015
=
=
= =
; = Δ
Additional relations:
ΣF = 0ΣM = 0
For a solid shaft:
For a hollow shaft:
J= 2
J = ( − ! )
2
ME2570 Mechanics of Materials. 2nd Test
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