申論題

2. At the proportional limit, an eight-inch gage length of a l/2-inch diameter bar has elongated 0.012 inch and the diameter has reduced 0.00025 inch. The total axial load was 4800 lb. Determine the following properties of this material:

(e) what would be the factor of safety with respect to slip if a one-inch diameter bar of the same material was carrying the same load? (5%)