EBK MECHANICS OF MATERIALS
7th Edition
ISBN: 8220100257063
Author: BEER
Publisher: YUZU
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Textbook Question
Chapter 11.3, Problem 22P
Each member of the truss shown is made of aluminum and has the cross-sectional area shown. Using E = 72 GPa, determine the strain energy of the truss for the loading shown.
Fig. P11.22
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A solid 20-mm-diameter shaft is subjected
to an axial load P. The shaft is made of
aluminum [E = 70 GPa; v=0.33]. A strain gage
is mounted on the shaft at the orientation shown
in Fig. P13.77.
(a) If P= 18.5 kN, determine the strain reading
that would be expected from the gage.
(b) If the gage indicates a strain value of ε = 950
ue, determine the axial force P applied to
the shaft.
H.W.7 A rigid steel bar ABC is supported by three rods.
There is no strain in the rods before load P is applied. After
load P is applied, the axial strain in rod (1) is 1,200 µɛ.
(1)
2,000 mm
(a) Determine the axial strain in rods (2).
(b) Determine the axial strain in rods (2) if there is a 0.5 mm
gap in the connections between rods (2) and the rigid
bar before the load is applied.
520 mm
400 mm
1,250 mm
(2)
Prove that the sum of the normal strains in perpendicular directions is constant, i.e., Px + Py = Px′ + Py′
Chapter 11 Solutions
EBK MECHANICS OF MATERIALS
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