Question

Required information The cantilevered bar in the figure is made from a ductile material and is statically loaded with Fy=380 lbf and Fx = Fz=0. The diameter Dis 3 in and the height his 3.5 in. Lengths AB and BC are 12 in and 5 in, respectively. What is the location of the critical stress element?

Answer 1

The point in the bottom fibres of the cross section at the fixed end that is at A. The bottom most point on the cross section faces the maximum stress values due to the load F_y because the moment occurs about Z-axis in counter clock wise due to load F_y is maximum at the fixed end. The stress due to this moment is tensile at that point. So at the fixed end i.e. at A we have critical point.