A sheet of metal was deformed elastically under balanced biaxial tension (σ x = oy, σ z = 0)
A. Derive an expression for the ratio of elastic strains, ez/ex, in terms of the elastic constants.
B. If E = 70 GPa and υ = 0.30, and ey is measured as 1.00 × 10-3, what is the value of ez?