A rectangular plate is 3.0 m by 10.0 m. It is fixed along the two shorter edges and one of the longer edges to a rigid wall. At 25 ºC, there is a gap of 8.0 mm between the other edge and a fourth rigid wall. The temperature of the plate is suddenly increased by 40 ºC, and is held at this temperature for 15 hours. The elastic plate has a modulus of 200 GPa, Poisson's ratio of 0.30, and a thermal expansion coefficient of 30 x 10-6 /ºC. The creep law for the material is given by where the von Mises effective stress is in MPa