Engineering, 25.10.2019 03:43 juliannabartra
A1045 hot-rolled steel tension test specimen has a diameter of 6.25 mm and a gage length of 21 mm. in a test to fracture, the stress and strain data below were obtained. determine (a) the modulus of elasticity. (b) the proportional limit. (c) the ultimate strength. (d) the yield strength (0.05% offset). (e) the yield strength (0.20% offset). (f) the fracture stress. (g) the true fracture stress if the final diameter of the specimen at the location of the fracture was 4.80 mm. load change in length load change in length (kn) (mm) (kn) (mm) 0.00 0.00 13.89 0.29 3.38 0.01 16.03 0.61 6.77 0.02 18.41 1.04 10.15 0.03 21.23 1.80 13.54 0.04 22.07 2.26 13.66 0.05 22.24 2.78 13.75 0.06 21.43 2.78 13.86 0.08 20.03 3.83 13.89 0.09 19.60 3.94 13.89 0.10 19.35 4.00 13.89 0.14 19.09 4.06 13.89 0.17 18.82 4.12 18.63 fracture
Answers: 2
Engineering, 03.07.2019 15:10
Heat is added to a piston-cylinder device filled with 2 kg of air to raise its temperature 400 c from an initial temperature of t1 27 cand pressure of pi 1 mpa. the process is isobaric process. find a)-the final pressure p2 b)-the heat transfer to the air.
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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
Ifa component is made of two or more materials with different modulus of elasticity (e), it is called a composite member and we calculate the factor·n". mention the formula for calculating n". also, ifn> 1, explain what will happen to the 1. transformed.gi) ifn 1, what will happen to the material when transformed material when
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Engineering, 04.07.2019 18:10
An air compression refrigeration system is to have an air pressure of 100 psia in the brine tank and an allowable air temperature increase of 60°f for standard vapor compression cycle temperatures of 77 f entering the expansion cylinder and 14 f entering the compression cylinder, calculate the coefficient of performance a. 2.5 b 3.3 c. 4.0 d. 5.0
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A1045 hot-rolled steel tension test specimen has a diameter of 6.25 mm and a gage length of 21 mm. i...
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