A D6AC steel (at room temper- ature) plate is loaded to a gross- area stress sg = 0.50 Sy . The dimensions for the thick plate are t = 1 in., 2w = 8 in., a/2c = 0.25, and 2c = 1 in. Calculate the center crack depth, a, and determine if the plate will fail due to the center crack. What is the safety factor (see Figure)?
