Notice that the deformation is axial symmetric and it is only a function of the radius.
Hence, = 0.271728515625 mm 0.272 mm
The maximum bending moment occurs at the center of the plate, r = 0.
The maximum stress occurs at the center of the plate near surface, r = 0, z = ±h/2.
max = 0.7734375 MPa 0.773 MPa