A rectangular steel plate [E = 210 GPa, ν = 0.27, and Y = 26…

A rectаngulаr steel plаte [E = 210 GPa, ν = 0.27, and Y = 260 MPa] has a width оf 0.9 m, a length оf 1.3 m, and a thickness оf 30 mm. The two shorter edges are fixed, and the two longer edges are simply supported. The plate is subjected to a uniform pressure of 60 kPa. Considering the effect of Poisson's ratio, determine the maximum bending stress in the plate.