Engineering, 06.05.2020 04:44 mirandapaige246
The following figures were obtained in a standard tensile test on a specimen of low carbon steel with a circular sectional area: Diameter of specimen, 50 mm; Gauge length (the length of a specimen used for testing purposes), 100 mm; Minimum diameter after fracture, 10 mm. Load (kN) 2.2 4.5 6.8 9.2 11.8 14.4 17 19.6 22.2 24.7 Extension (μm) 5.6 11.9 18.2 24.5 31.5 38.5 45.5 52.5 59.5 66.5 Load (kN) 27.13 28.6 29.1 29.6 30.2 31 31.7 32 32.9 34.8 Extension (μm) 73.5 81.2 89.6 112 224 448 672 840 1120 1680 Load (kN) 35.8 37 38.7 39.5 40 39.6 35.7 28 Extension (μm) 1960 2520 3640 5600 7840 11200 13440 14560 (a) Generate engineering stress vs engineering strain plot (use a computer tool for accurate plotting. Hand sketch is Not allowed). (b) Determine Young’s modulus of elasticity. (c) Determine the ultimate tensile stress. (d) Determine the percentage reduction of area. (e) Determine the percentage elongation. (f) Determine true stress at fracture.
Answers: 1
Engineering, 04.07.2019 18:10
Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.
Answers: 1
Engineering, 04.07.2019 18:10
Give heat transfer applications for the following, (i) gas turbines (propulsion) ) gas turbines (power generation). (iii) steam turbines. (iv) combined heat and power (chp). (v) automotive engines
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Engineering, 04.07.2019 18:20
Wiy doeres rere okhn a pump whon working betwon the same pressure range?
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Engineering, 04.07.2019 19:10
Asteam is contained in a rigid tank with a volume of 1 m3. initially, the pressure and temperature are 7 bar and 500 oc, respectively. the temperature drops due to cooling process. determine: (1) the temperature at which condensation begins in °c, (2) the fraction of the total mass that has condensed when the pressure decreased to 0.5 bar. (3) the volume in m3 occupied by saturated liquid at the final state?
Answers: 3
The following figures were obtained in a standard tensile test on a specimen of low carbon steel wit...
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