Mechanics of Materials, 7th Edition
7th Edition
ISBN: 9780073398235
Author: Ferdinand P. Beer, E. Russell Johnston Jr., John T. DeWolf, David F. Mazurek
Publisher: McGraw-Hill Education
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Chapter 1.2, Problem 4P
Two solid cylindrical rods AB and BC are welded together at B and loaded as shown. Determine the magnitude of the force P for which the tensile stresses in rods AB and BC are equal.
Fig. P1.3 and P1.4
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PROBLEM 1.3
3 in.
30 kips
Two solid cylindrical rods AB and BC are welded together
at B and loaded as shown. Determine the magnitude of the
force P for which the tensile stress in rod AB is twice the
magnitude of the compressive stress in rod BC.
30 kips
40 in
PROBLEM 1.4
In Prob. 1.3, knowing that P = 40 kips, determine the
average normal stress at the midsection of (a) rod AB,
(b) rod BC.
2.13 A steel plate, which is 1.5 m by 1.5 m and 30 mm thick, is lifted by four cables
attached to its corners that meet at a point that is 2 m above the plate. Determine
the required cross-sectional area of the cables if the stress in them is not to
exceed 20 MPa.
Steel
plate
Prob. 2.13
Cables
PROBLEM 1.2
Two solid cylindrical rods AB and BC are welded together at B and loaded
as shown. Knowing that d = 50 mm and dz = 30 mm, find the average
normal stress at the midsection of (a) rod AB, (b) rod BC.
300 mm
40 kN
250 mm
V30 KN
Chapter 1 Solutions
Mechanics of Materials, 7th Edition
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