In a tensile test for an aluminum alloy, the sample is 2 inches long and 0.5 inches in diameter. The proportional portion of the tension stress-strain diagram for an aluminum alloy is shown below. It the diameter change of the sample was also monitored during the above test, and it was found that the lateral strain of the sample is 1/3 of its axial longitudinal strain, what is the Poisson' ratio of the material under test: Calculate your answer to 2 decimal place. σ (ksi) 70 MI 0.00614 € (in./in.)

A tension test is being conducted on a steel-rod specimen with a gauge length of L0=2 in and initial diameter of d0=0.5 in. Data were collected to form the conventional stress-strain diagram as shown. From the diagram, f = 74.0 ksi, e = 104.0 ksi , g = 85.0 ksi , and h = 0.15 in/in. Assuming that the strain remains constant throughout the region between the gauge points, determine the nominal strain ε experienced by the rod if it is elongated to L = 2.7 in . Assuming that the stress is constant over the cross-sectional area and if the tension force used is P = 11.0 kips, find the nominal stress experienced by the rod. Determine the force P needed to reach the ultimate stress in the steel-rod specimen.

The yield strength of 5 steel specimens was determined using the uniaxial tension test. The mean value of the yield strength is 29 ksi. If the sample standard deviation is 2 ksi, the 95% confidence interval for the yield strength of steel is:  A. (26.5ksi, 31.5ksi) B. (25.7ksi, 31.3ksi) C. (27ksi, 31ksi) D. (25ksi, 30ksi)

A brass alloy rod having a cross sectional area of 0.24 in.2and a modulus of 16 * 106 psi is subjected to a tensile load. Plastic deformation was observed to begin at a load of 8,944 lb.a. Determine the maximum stress that can be applied without plastic deformation.b. If the maximum length to which a specimen may be stretched without causing plastic deformation is 3.28 in., what is the original specimen length?