Suppose the welded steel bracket shown in the figure is bolted underneath a structural-steel ceiling beam to support a fluctuating vertical load imposed on it by a pin and yoke. The bolts are 1/2 -in coarse-thread SAE grade 8, tightened to recommended preload for nonpermanent assembly. The stiffnesses have already been computed and are kb = 4 Mlb/in and km = 16 Mlb/in.

(a) Assuming that the bolts, rather than the welds, govern the strength of this design, determine the safe repeated load that can be imposed on this assembly using the Goodman criterion with the load line in Figure. 8€“20 and a fatigue design factor of 2.
(b) Compute the static load factors based on the load found in part(a).

Transcribed Image Text:

B