Prob. 2.13-8. A thin, rectangular plate is subjected to a uni- form biaxial state of stress (,,,). All other components of stress are zero. The initial dimensions of the plate are

L₂ = 4 in. and Ly = 2 in., but after the loading is applied, the dimen- sions are L = 4.00176 in., and L=2.00344 in. If it is known that = 10 ksi and E= 10 x 10²³ ksi, (a) what is the value of Poisson's ratio? (b) What is the value of o,? P2.13-8 o₂ = 10 ksl