40 60 A circle of 200 mm dia. is drawn on a mild steel plate before it is subjected to two mutually perpendicular stresses of 160 MPa and 40 MPa along with a shear stress of 60 MPa. After stressing, the circle on the plate deforms to an ellipse. determine the lengths of major and minor axes of the ellipse and their directions. E =205 GPa 60 1604 160 60 and Poisson's ratio= 0.3. 60 (MPa) 40