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Fatigue crack growth thresholds can be determined much more quickly using ultrasonic loading devices than with conventional servo hydraulic test machines. If the fatigue test in the previous problem were to be conducted under ultrasonic loading at a frequency of 15 000 Hz, estimate the amount of time required to determine the fatigue threshold. Discuss the advantages and disadvantages of the ultrasonic test method over those of the conventional test method.
You fill a 2-cubic wheelbarrow to the top with aggregate. if the specific gravity of the aggregate is 2.548, and 18% of the aggregate is void spaces, how much does the aggregate in the wheelbarrow weight?
Estimate the size of a uniform, horizontal welded-steel pipe installed to carry 14.0 ft^3/sec of water 20 degreesC. The allowable pressure loss resulting from friction is 17ft/mi of pipe length.
Engineers sometimes add chlorine to water in pipes to disinfect water. It is desired to achieve four logs of kill. This means that the effluent concentration of microorganisms is 10^4 times the influent. The flow in the river is 30ft^3/min and the fi..
A sanitary landfill project needs an import soil for use as an impervious cap over the refuse. The design engineer desires a soil with a high clay content because it will help keep water out of the landfill.
The material is brought from a borrow site that has yt=19.5 kn/M63 with w=16.5% and Gs=2.70 How much of the borrow material (in cubic meters) is required to fill the site How heavy is it
Design the temperature reinforcement, tie bars, and dowel bars for a highway concrete pavement with 13 inch slabs, f'c=3500 psi, traverse joints at 35 ft apar,t and with 3 12 ft lanes each way. Use grade 60 steel
Knowing that the coefficient of kinetic friction between a sled and the run is 0.10 and that the speed of the sled is 25 ft/s at B, determine the tangential component of the acceleration of the sled a) just before it reaches B, b) just after it pa..
1.How long is the irrigation boom (in feet) from the center pivot to its farthest extent. 2.If the irrigation boom makes 4 full revolutions in a day, how many miles does the end of the boom travel in 4 days.
A two stage rocket with a total mass of 925kg is traveling at a speed of 6.6 10^3 m/s away from the earth . A predesigned explosion separates into two sections of equal mass that move with a speed of 2800m/s relative to each other along the original ..
A power plant emits 95 g/s of SO2 from an effective stack height of 60 m. The wind speed is 3 m/s and the solar insolation is slight.
You need to compare measured and predicted deflections for the three situations described below. Comment on reasons for the differences between the predicted and measured values. Recall that E = 69 GN/m2, rho = 2700 kg/m3, and the beam cross-section ..
determine the practical moment strength phi x Msubn for a rectangular reinforced concrete cross section having a width (b of 13 in.) and an effective depth (d of 24 in.) The tension reinforcing steel is four no# 8 bars.
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