February 21, 2020

PROBLEM 8.21

For the assembly and loading of Prob. 8.8, determine (a) the average

shearing stress in the pin at C, (b) the average bearing stress at C in

member BC, (c) the average bearing stress at B in member BC.

PROBLEM 8.8 Two horizontal 5-kip forces are applied to pin B of the

assembly shown. Knowing that a pin of 0.8-in. diameter is used at each

connection, determine the maximum value of the average normal stress

(a) in link AB, (b) in link BC.

SOLUTION Continued

PROBLEM 8.22

The hydraulic cylinder CF, which partially controls the position of rod

DE, has been locked in the position shown. Member BD is

5

8

in. thick

and is connected to the vertical rod by a

3

8

-in.-diameter bolt. Determine

(a) the average shearing stress in the bolt, (b) the bearing stress at C in

member BD.

SOLUTION Continued

PROBLEM 8.23

Knowing that

θ

= 40° and P = 9 kN, determine (a) the smallest

allowable diameter of the pin at B if the average shearing stress in

the pin is not to exceed 120 MPa, (b) the corresponding average

bearing stress in member AB at B, (c) the corresponding average

bearing stress in each of the support brackets at B.

SOLUTION Continued

PROBLEM 8.24

Determine the largest load P which may be applied at A when

θ

= 60°, knowing that the average shearing stress in the 10-mm-

diameter pin at B must not exceed 120 MPa and that the average

bearing stress in member AB and in the bracket at B must not

exceed 90 MPa.

PROBLEM 8.25

Two wooden members of uniform rectangular cross section are joined

by the simple glued scarf splice shown. Knowing that P = 11 kN,

determine the normal and shearing stresses in the glued splice.

PROBLEM 8.26

Two wooden members of uniform rectangular cross section are joined

by the simple glued scarf splice shown. Knowing that the maximum

allowable shearing stress in the glued splice is 620 kPa, determine

(a) the largest load P that can be safely applied, (b) the corresponding

tensile stress in the splice.