Prob- In a tensile test carried out in the laboratory on a steel specimen for 5 minutes. The strain value noted at that time was 0.30. What is the average strain rate of that steel specimen?
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- A tensile test was performed on a metal specimen having a circular cross section with a diameter of 1 2 inch. The gage length (the length over which the elongation is measured) is 2 inches. For a load 13.5 kips, the elongation was 4.6610 3 inches. If the load is assumed to be within the linear elastic rang: of the material, determine the modulus of elasticity.The data in Table 1.5.3 were obtained from a tensile test of a metal specimen with a rectangular cross section of 0.2011in.2 in area and a gage length (the length over which the elongation is measured) of 2.000 inches. The specimen was not loaded to failure. a. Generate a table of stress and strain values. b. Plot these values and draw a best-fit line to obtain a stress-strain curve. c. Determine the modulus of elasticity from the slope of the linear portion of the curve. d. Estimate the value of the proportional limit. e. Use the 0.2 offset method to determine the yield stress.A tensile test was performed on a metal specimen having a circular cross section with a diameter 0. 510 inch. For each increment of load applied, the strain was directly determined by means of a strain gage attached to the specimen. The results are, shown in Table: 1.5.1. a. Prepare a table of stress and strain. b. Plot these data to obtain a stress-strain curve. Do not connect the data points; draw a best-fit straight line through them. c. Determine the modulus of elasticity as the slope of the best-fit line.
- The results of a tensile test are shown in Table 1.5.2. The test was performed on a metal specimen with a circular cross section. The diameter was 3 8 inch and the gage length (The length over which the elongation is measured) was 2 inches. a. Use the data in Table 1.5.2 to produce a table of stress and strain values. b. Plot the stress-strain data and draw a best-fit curve. c. Compute the, modulus of elasticity from the initial slope of the curve. d. Estimate the yield stress.During a tensile test on a specimen of steel the following data was recorded, diameter of specimen 6.6mm gauge length of 50mm ,elongation of a load of 6.0 KN of 0.043mm. Reduction of area at failure of 45percent. Calculate the youngs modulus of elasticity ,the yield stress and the ultimate stressIn a tensile test, Load and Elongation are Normalized to Engineering Stress and Engineering Strain . Why?
- A load applied to a machine component results in the state of plane stress ?x=80 MPa, ?y=100 MPa, ?xy=60 MPa. The component is made of a brittle high-strength steel that follows the maximum normal stress criterion with ?u=200 MPa. If increasing the load increases each stress component proportionally, determine the percentage increase that can be applied before the component fails.A steel bar with a 30 mm diameter is tested in tension. By monitoring the load reading of the testing machine, it was found that the specimen yielded at a load of 185 kN and fractured at 215 kN. Determine the tensile stresses at yield and at fracture. Estimate how much increase in length would occur at 70% of the yield stress in a 50 mm gauge length.A tensile test was done on a steel specimen with the gauge length of 525 and a stress of 175 MPa. If the deformation is entirely elastic, what will be the resultant elongation? The modulus of elasticity of steel is 207 GPa.