A square (Figure P12-3) simply supported 20 in. Ã 20 in. steel plate with thickness 0.15 in.

Question:

A square (Figure P12-3) simply supported 20 in. Ã— 20 in. steel plate with thickness 0.15 in. has a round hole of 4 in. diameter drilled through its center. The plate is uniformly loaded with a load of 5 lb/in2. Determine the maximum principal stress in the plate.
Figure P12-3