Manufacturing Engineering And Technology
7th Edition
ISBN: 9789810694067
Author: Stephen R. Schmid (author) Serope Kalpakjian (author)
Publisher: Pearson Education Orphans
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Chapter 1, Problem 48QTP
The following data are obtained in tension tests of brass:
| Grain size (μm) | Yield stress (MPa) |
| 15 | 150 |
| 20 | 140 |
| 50 | 105 |
| 75 | 90 |
| 100 | 75 |
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The following data are obtained from a tensile test of a copper specimen.
- The load at the yield point is 142 kN.
- Length of the specimen is 23 mm.
- The yield strength is 82 kN/mm2.
- The percentage of elongation is 48 %.
Determine the following
(i) Diameter of the specimen,
ii) Final length of the specimen,
iii) Stress under an elastic load of 15 kN,
iv) Young's Modulus if the elongation is 1.6 mm at 15 kN and
(v) Final diameter if the percentage of reduction in area is 20 %.
Solution
Initial Cross-sectional Area (in mm2)
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/mm2)
Answer for part 4
Young's Modulus of the Specimen (in N/mm2)
Answer for part 5
Final Area of the Specimen at Fracture (in mm)
Answer for part 6
Final Diameter of the Specimen after Fracture (in mm)
The following data are obtained from a tensile test of a copper specimen.
- The load at the yield point is 146 kN.
- Length of the specimen is 25 mm.
- The yield strength is 83 kN/mm2.
- The percentage of elongation is 40 %.
Determine the following
(i) Diameter of the specimen,
ii) Final length of the specimen,
iii) Stress under an elastic load of 14 kN,
iv) Young's Modulus if the elongation is 1.1 mm at 14 kN and
(v) Final diameter if the percentage of reduction in area is 25 %.
Solution
Initial Cross-sectional Area (in mm2)
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/mm2)
Answer for part 4
Young's Modulus of the Specimen (in N/mm2)
Answer for part 5
Final Area of the Specimen at Fracture (in mm)
Answer for part 6
Final Diameter of the Specimen after Fracture (in mm)
Answer for part 7
The following data are obtained from a tensile test of a copper specimen.
- The load at the yield point is 151 kN.
- Length of the specimen is 23 mm.
- The yield strength is 79 kN/mm2.
- 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 17 kN,
iv) Young's Modulus if the elongation is 2.4 mm at 17 kN and
(v) Final diameter if the percentage of reduction in area is 24 %.
Find:
1)Stress at the elastic load (in N/mm2)
2)Young's Modulus of the Specimen (in N/mm2)
3)Final Area of the Specimen at Fracture (in mm)
4)Final Diameter of the Specimen after Fracture (in mm)
Chapter 1 Solutions
Manufacturing Engineering And Technology
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