T2 30° 2r Cables Nut 30° Eye bolt T3 Steel plate PROBLEM 1.8-7
A special-purpose eye boll with a shank diameter d -0.50 in.
passes
through, a hole in a steel plate of thickness tp=0.75 in. (see Figure) and
is secured by a nut with thickness t=0.25 in. The hexagonal nut bears
directly against the steel plate. The radius of the circumscribed circle for
the hexagon is r= 0.40 in., so each side of the hexagon has a length 0.40
in. The tensile Forces in three cables attached to the eye bolt are T1=800
lb, T2=500 lb. and T3= 124 lb.
(a) Find the resultant force acting on the eye
bolt.
(b) Determine the average bearing stress cr,between the hexagonal nut
on the eye boll and the plate.
(c) Determine the average shear stress T
in the nut and also in the aver steel plate.
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