EBK MECHANICS OF MATERIALS
7th Edition
ISBN: 8220100257063
Author: BEER
Publisher: YUZU
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Chapter 1.5, Problem 48P
A load P is supported as shown by a steel pin that has been inserted in a short wooden member hanging from the ceiling. The ultimate strength of the wood used is 60 MPa in tension and 7.5 MPa in shear, while the ultimate strength of the steel is 145 MPa in shear. Knowing that b = 40 mm, c = 55 mm, and d = 12 mm, determine the load P if an overall factor of safety of 3.2 is desired.
Fig. P1.47
1.48 For the support of Prob. 1.47, knowing that the diameter of the pin is d = 16 mm and that the magnitude of the load is P = 20 kN, determine (a) the factor of safety for the pin (b) the required values of b and c if the factor of safety for the wooden member is the same as that found in part a for the pin.
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A load P is supported as shown by a steel pin that has been inserted in a short wooden member hanging from the ceiling. The ultimate strength of the wood used is 60 MPa in tension and 7.5 MPa in shear,while the ultimate strength of the steel is 145 MPa in shear. Knowing that b = 40 mm, c = 55 mm, and d = 12 mm, determine the load P if an overall factor of safety of 3.2 is desired.
Two portions of member AB are glued together along a plane
forming an angle with the horizontal. The ultimate stress for the
glued joint is 3.3 ksi in tension and 2.2 ksi in shear.
NOTE: This is a multi-part question. Once an answer is submitted,
you will be unable to return to this part.
2.0 in.
B
2.4 kips
1.25 in.
Determine the value of 0 for which the factor of safety of the member is maximum.
(Hint: Equate the expressions obtained for the factors of safety with respect to the
normal and shearing stresses.)
!
Required information
Each of the five struts shown consists of a solid steel rod with E= 200 GPa.
Given: Po = 7.2 kN
900 mm
Po
(1)
Po
(2)
Po
(3)
(5)
Knowing that the strut of Fig. (1) is of a 20-mm diameter, determine the factor of safety with respect to buckling for the loading shown.
(Round the final answer to two decimal places. You must provide an answer before moving the the next part.)
The factor of safety is
Chapter 1 Solutions
EBK MECHANICS OF MATERIALS
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