1 - A tensile test is carried out on a specimen of mild steel of gauge length40 mm and diameter 7.42 mm. The results are:Load (kN)101725303437.5 38.536Extension (mm) 0 0.05 0.08 0.11 0.140.20 0.40 0.60 0.90At fracture the final length of the specimen is 40.90 mm.Plot the load/ extension graph and determine(a) The modulus of elasticity for mild steel,(b) The yield stress,(c) The ultimate tensile strength,(d) The percentage elongation2 - An aluminum alloy specimen of gauge length 75 mm and of diameter11.28 mm was subjected to a tensile test, with these results:Load (kN)2.06.511.513.616.018.019.020.519.0Extension (mm) 0 0.012 0.039 0.069 0.080 0.107 0.133 0.158 0.225 0.310The specimen fractured at a load of 19.0 kN.Determine(a) the modulus of elasticity of the alloy,(b) The percentage elongation.(c) The ductility in term of reduction of area(d) Fracture stress(e) Tensile strength

1) Gage length of the specimen, L=40 mm Initial diameter of the specimen, d= 7.42 mm At fracture the…

Answered: 1 - A tensile test is carried out on a…

1 - A tensile test is carried out on a specimen of mild steel of gauge length 40 mm and diameter 7.42 mm. The results are:

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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In a tensile test on a specimen of black mild steel of 12 mm diameter, the following results were obtained for a gauge length of 60 mm. Load W(kN) 5 10 15 20 25 30 35 40 Extension x (10-3 mm) 14 27.2 41 54 67.6 81.2 96 112 When tested to destruction. Maximum load = 65 kN; load at fracture = 50 kN, diameter at fracture = 7.5 mm, total extension on gauge length = 17 mm. Find young's modulus, specific modulus, ultimate tensile stress, breaking stress, true stress at fracture, limit of proportionality, percentage elongation, percentage reduction in area. The relative density of the steel is 7.8. Draw the straight line graph. Answer: breaking stress,true stress at fracture and limit of proportionality.
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
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