A 120 mm x 120 mm x 50 mm thick sheet of copper is stretched biaxially as shown. If the normal stress is 40 MPa in the y direction and the new thickness of the plate in the z direction is 49.98 mm, determine the normal stress in the x direction. Copper has a modulus of elasticity of 110 GPa and a Poisson’s ratio of 0.35.
Use the stress-strain transform equations, and solve for the unknown quantity.
Maybe a better understanding of English would help.
