During a tension test, measurements for the applied load and the corresponding elongation are taken at frequent intervals. These data points are a. calculate the stress caused by the applied load at each data point. b. calculate the strain in the specimen induced by the applied load at each data point.

Strength For the state of plane stress shown, determine the largest value of o, for which the maximum in plane shear stress is equal to or less than 75 MPa. After you determine the value, draw Mohr circle for the case

650 600 550 500 450 400 350 300 250 200 150 100 50 0.002 0.004 0.006 0.008 0.01 0.012 0.014 0.016 0.018 0.02 Strain mm/mm The graph above shows the stress-strain relationship of a steel bar under tension test. The steel bar diameter = 8 mm and the bar gauge length = 100 mm. Determine the following: Toughness of the specimen Stress (MPa)

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)