Question 1(1 point] v' Saved The fatigue stress concentration factor is __ O a] equal to the theoretical strsss concnetration factor, Kt O 13) only used for brittle materials G) c) the ratio of the fatigue strength of notch-free specimen over the fatigue strength of notched specimen 0 d} unneccesary for ductile materials Question 2 {1 point) When using the Goodman failure criteria for fluctuating stress, if the fatigue factor of safety is less than one, then ____[select all that apply} C] a] the machine component will fail by yielding [:J b) finite life is predicted C] c} an equivalent alternating stress can he used to estimate the number of cycles to failure [3 d} infinite life is predicted