mechanics of materials 6th edition riley solution manualpdf
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Mechanics of Materials 6th Edition Riley | Solution Manual
,CHAPTER 1
,
, PROBLEM 1.1
Two solid cylindrical rods AB and BC are welded together at B and
loaded as shown. Knowing that the average normal stress must not
exceed 175 MPa in rod AB and 150 MPa in rod BC, determine the
smallest allowable values of and d2.
SOLUTION
(a) Rod AB
P = 40 + 30 = 70 kN = 70 103N
P P 4P
AB = =
=
AAB d
4 1
2
d12
4P (4)(70 103) = 22.6 10 −3
d1 = = m d1 = 22.6 mm ◀
AB (175 106)
(b) Rod BC
P = 30 kN = 30 103N
P P 4P
BC = =
=
ABC d
4 2
2
d 22
4P (4)(30 103)
d2 = = = 15.96 10−3 m d2 = 15.96 mm ◀
BC (150 106)
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