Elements Of Electromagnetics
7th Edition
ISBN: 9780190698614
Author: Sadiku, Matthew N. O.
Publisher: Oxford University Press
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consider the following stress-strain graph of a hypothetical metal with a cross-sectional area of 28.27 mm2.
1.) What is the maximum load that the metal can sustain?
2.) If the final cross-sectional area after the tensile test is 12.57 mm2, what is the true stress in MPa?
Transcribed Image Text:0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
0.5
0.55
0.6
0.65
0.7
0.75
0.8
0.85
0.9
0.95
1
1.05
1.1
1.15
1.2
1.25
1.3
1.35
1.4
1.45
1.5
1.55
1.6
1.65
1.7
1.75
1.8
1.85
1.9
1.95
2
2.05
2.1
2.15
2.2
2.25
2.3
2.35
2.4
2.45
2.5
2.55
2.6
2.65
2.7
2.75
2.8
2.85
2.9
2.95
3
3.05
4
6
10
12
16
18
20
22
24
Stress, MPa
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50
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56
58
60
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- 1. For the stress-strain curve shown below, please estimate the properties indicated. (a) Fracture Strain Please do your work on a separate sheet of paper, and put your answers in the boxes on the right. Be sure to include the proper symbol and units. Stress Strain 70 60 50 Stress (ksi) 240 30 20 10 70 0 0.000 60 50 Stress (ksi) 40 20 10 KULL 0 0.000 0.010 0.050 0.100 Strain (in/in) Stress Strain 0.020 0.030 Strain (in/in) 0.040 0.150 0.050 (b) Ultimate Tensile Stress (c) Fracture Stress (d) Proportional Limit (e) Elastic Modulus (1) Yield Stress (g) Tensile Toughness (Modulus of Toughness) (h) Modulus of Resiliencearrow_forwardDetermine the percentage of ductility of a metal alloy having the following tensile stress-strain diagram. Tensile stress-strain diagram 450 400 350 300 250 200 150 100 NO 50 0.05 0.1 0.15 0.2 0.25 0.3 0 35 0.4 Strain 300 EN Stress (Mpa)arrow_forward3. An aluminum sample was tensile tested with a force of 35,500 N. The sample has a rectangular cross section with dimension 10 mm x 12.7 mm. It was observed that only elastic deformation occurred. If the modulus of elasticity of Al is 69 GPa, calculate the resulting strain.arrow_forward
- If the true stress is 74 MPa for the specimen described above elongated by 2.6 cm, what is the difference between nominal and true stress in MPa (absolute value)?arrow_forward1) Large Deformation Material Properties: During a tensile test using a metal that obeys the power law, the ultimate tensile strength is found to be 350 MPa. Reaching that maximum load required an elongation of 35%. Find K and n, then calculate the percent elongation when the stress is 250, 300, and 400 MPa.arrow_forward3. A cylindrical specimen of cold-worked copper has a ductility, %EL. If its cold-worked radius is d, what was its radius before deformation? Use %EL=25%; d = 10mm Ductility (%EL) 70 60 50 40 30 20 Brass 1040 Steel 10 Copper 0 0 10 110 20 30 40 50 60 70 Percent cold workarrow_forward
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