Unformatted text preview: i": I :j 1.53 Each of the two vertical links CF connecting the two horizontal members AD
and EG has 3 to K 40— mm uniform rectangular cross section and is made of a steel with
an ultimate strength in tension of400 MPa, .while each of the pins at C and F has a 20-
mm diameter and is made of a steel with an ultimate strength in shear of 150 MPa.
Determine the overall factor of safety for the links CF and the pins connecting them to
the horizontal members. 1.54 Solve Prob. 1.53, assuming that the pins at C and F have been replaced by pins with a 30- mm diameter. SOLUTION
Use member EFG as Free. body. Bases! om +eh3t'ovi in [Pinks CF'
A = (hr-Jill = (0.040- 0.0So)(0.0to]=‘ IOO Noam (one Auk) 25M = czttuoovIO‘l(ww10") = 80.0H03 N 80-st on 400L792. shear in Pins A " %°"' = $9.030? ‘-' 706.85 we"; in"
F” = 223A = (2.)(t50‘ﬂ0‘ 300636210“) = 2:2.oexlo’ N
Act-cal F], is snailer leue, Le. F“ 80.0 was N 3
Factor 9‘? sa-Pe‘i'y ES. 3 E” = Egg—«#33 : 2.05 i
CF i ...
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- Summer '10