At Bob’s Discount Materials Testing Emporium of Wonders, a client looking to save a few dollars wanted a test conducted in order to find the Poisson’s Ratio for a material with elastic modulus, E = 70 GPa. A 200-mm long sample with circular cross-section (diameter = 20 mm) was subjected to an elastic axial load of 60 kN. Due to funding cuts and general apathy by the staff, the equipment isn’t available to measure axial strain while in the testing apparatus so it must be calculated. Under load, the diameter was measured (using a cheap Harbor Freight micrometer) and found to have contracted by 0.015 mm. As an overworked, unpaid intern on Bob’s staff, sigh, roll your eyes, and begrudgingly calculate the following values: a. Lateral Strain, εlat.
b. Axial Strain, εaxial.
c. Poisson's Ratio, V = .
d. Shear Modulus, G = .GPa