It is desired to evaluate the tensile properties of an aluminum alloy. A tensile test is...

  

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It is desired to evaluate the tensile properties of an aluminum alloy. A tensile test is performed using a standard cylindrical tensile specimen with a diameter of 12.8 mm and a gauge length of 50.800 mm. The gage length and final diameter of the sample are measured after the sample is removed from the testing machine. The gage length and the diameter of the necked region after the specimen was removed from the testing machine are 60 mm and 9 mm, respectively. The following data was generated during the tests. 7. Use the information in the following table and the load - elongation curve to calculate: A. Calculate the engineering stress at rupture (point 16) B. Calculate the engineering strain at rupture (point 16) C. Calculate the true strain at the maximum load (point 12). D. Calculate the true stress at the maximum load (point 12). 8. Using points 8 and 12 in the following table, determine the values of the strength coefficient and the strain hardening exponent. A. Strength Coefficient (K) B. Strain Hardening Exponent (n) Point on Curve 1 2 34 3 5 6 7 8 9 10 11 12 13 14 15 16 length (mm) 50.800 50.851 50.902 50.952 51.003 51.054 51.308 51.816 52.832 53.848 54.864 55.880 56.896 57.658 58.420 59.182 Load (N) 0 7,330 15,100 23,100 30,400 34,400 38,400 41,300 44,800 46,200 47,300 47,500 46,100 44,800 42,600 36,400 It is desired to evaluate the tensile properties of an aluminum alloy. A tensile test is performed using a standard cylindrical tensile specimen with a diameter of 12.8 mm and a gauge length of 50.800 mm. The gage length and final diameter of the sample are measured after the sample is removed from the testing machine. The gage length and the diameter of the necked region after the specimen was removed from the testing machine are 60 mm and 9 mm, respectively. The following data was generated during the tests. 7. Use the information in the following table and the load - elongation curve to calculate: A. Calculate the engineering stress at rupture (point 16) B. Calculate the engineering strain at rupture (point 16) C. Calculate the true strain at the maximum load (point 12). D. Calculate the true stress at the maximum load (point 12). 8. Using points 8 and 12 in the following table, determine the values of the strength coefficient and the strain hardening exponent. A. Strength Coefficient (K) B. Strain Hardening Exponent (n) Point on Curve 1 2 34 3 5 6 7 8 9 10 11 12 13 14 15 16 length (mm) 50.800 50.851 50.902 50.952 51.003 51.054 51.308 51.816 52.832 53.848 54.864 55.880 56.896 57.658 58.420 59.182 Load (N) 0 7,330 15,100 23,100 30,400 34,400 38,400 41,300 44,800 46,200 47,300 47,500 46,100 44,800 42,600 36,400

Answer rating: 100% (QA)

A Load at rupture point 36400 N Load Engineering stress T Initial Area 36400 28287 MPa T 12182 ... View the full answer