The following data are obtained from a tensile test of a copper specimen.
- The load at the yield point is 145 kN.
- Length of the specimen is 21 mm.
- The yield strength is 89 kN/mm^2.
- The percentage of elongation is 45%.
Determine the following:
(i) Diameter of the specimen,
(ii) Final length of the specimen,
(iii) Stress under an elastic load of 13 kN,
(iv) Young's Modulus if the elongation is 2.3 mm at 13 kN, and
(v) Final diameter if the percentage of reduction in area is 20%.
Solution:
Initial Cross-sectional Area (in mm^2)
Answer for part 1:
The Diameter of the Specimen (in mm)
Answer for part 2:
Final Length of the Specimen (in mm)
Answer for part 3:
Stress at the elastic load (in N/mm^2)
Answer for part 4:
Young's Modulus of the Specimen (in N/mm^2)
Answer for part 5:
Final Area of the Specimen at Fracture (in mm^2)
Answer for part 6:
Final Diameter of the Specimen after Fracture (in mm)
Answer for part 7:
Determine the elastic tensile load "F" that acts on mild steel specimen of Diameter 5 mm & Modulus of Elasticity 190 GPa. It is found that the specimen has undergone an extension of 1.9 mm due to the elastic load "F". Also, determine the length "L" of the specimen, if the strain-induced due to the load "F" on the specimen is 3.6 x 10^-3.
Solution:
Cross-sectional Area, A (in mm^2)
Answer for part 1:
Tensile Load, F (in N)
Answer for part 2:
Length of the Specimen (in mm)
