Q112 The plate is subjected to uniform edge loads, and a 60 strain rosette is mounted on its surface to measure strains as shown. The plate's original length a = 3 in, width b=2 in, and thickness t=0.125 in. The following readings are obtained for each gage: =180(10), &, = 210(10), & =210(10). 1) Find the strains &,,&,,, . (2 marks) 2) Find the stresses ,,,,,,, and strain &,. (6 marks) xy 3) Determine the principal strains. (2 marks) 4) Calculate the change in volume of the plate. (2 marks) 60 60 Take E = 21x10 ksi, v = 0.25. A plane stress developed in the plate, ie, = = = 0.