All Pages

Assignment Help Civil Engineering
Reference no: EM131069784

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.

Write a Review

Define data mining confusion matrix

Suppose that you issued a query against a search engine and the search engine retrieved 125 documents. Suppose that there are total, Define Data mining confusion matrix

What is the frequency of simple harmonic motion

A 96 pound mass is attached to a spring. If the fre- quency of simple harmonic motion is 13/pi cycles/s, what is the spring constant k? What is the frequency of simple harmonic motion if the original mass is replaced with an 288 pound mass?

Sketch how you will place the bars and calculate

Concrete cover on both sides. Sketch how you will place the bars and calculate the location of the effective depth. Place as many bars in the lower layers as possible.

Estimate daily evaporation from a lake using penmans formula

Estimate daily evaporation from a lake (cm/day) using Penman's (combined) formula, given the following information: average air temperature is 28 oC, average water temperature is 15 oC, average wind speed at 8m height is 20 Km/hr

What minimum angular velocity is necessary to keep the water

A bucket full of water is to be rotated in the vertical plane. What minimum angular velocity, in rad/s, is necessary to keep the water inside if the rotating arm is 120 cm

Calculate the pressure at b carries a lubricating oil

A 3-in. Schedule 40 steel pipe is 5000 ft long and carries a lubricating oil between two points A and B such that the Reynolds number is 800. Point B is 20 ft higher that A.

Determine the rise in water level within the drainage layer

A rectangular landfill in the New England area is 175 m in width, and sloped at the uniform angle of 75 degrees. Its cover system includes a drainage layer constructed of clean, medium sand (Ks = 10^-2 cm/s).

Estimate the minimum absolute pressure that can develop

When water at 70C flows through a convergingsection of pipe, the pipe pressure decreases in the direction of flow. Estimate the minimum absolute pressure that can develop without causing cavitation.

Determine the design a typical joint 50mm wide

A floor is to be supported on hardwood timber joists that are spaced at 0.5m centres and span 5.0m. The joists support flooring 20mm thick and an applied live load of 2kN/m2 Design a typical joint 50mm wide

What is min required heat transfer rate from heat source

A waste heat source is available at 400°C. A heat engine operates using heat from this source. It rejects heat to the surroundings at 38°C. The power from the engine runs an air conditioner to keep the air inside a building at 25°C

What mass of gac filters will be required to reach the limit

If 500 mL of benzene is spilled in a sealed room (64m^3), and it completely evaporates, what mass of GAC filters (Cmax = 80 mg benzene/1 g GAC) will be required to reach the permissible exposure limit for benzene

Determine what is the final specific volume of the system

A closed system of 0.123kg undergoes a frictionless, quasi-static process along the path PV=C from 100kpa to a final state where the volume is twice the initial volume.