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a very wide sheet of 7075-T651 aluminum plate, 8mm thick is found to have a single-edge through-the-thickness crack 25 mm long. The loading produes a gross nominal tension stress of 45 MPa perpendicular to the plane of the crack tip.
Calculate the stress intensity factor at the crack tip.
Determine the critical stress-intensity factor.
Estimate the factor of safety.
a machine part of mass 1.95 kg vibrates in a viscous medium. determine the damping coefficient when a harmonic exciting
determine the smallest horizontal force required to lift the 260- crate. the coefficient of static friction at all
the entire assembly is placed in an environment whose temperature is 200c. determine the volume of chamber 1 when thermodynamic equillibrium has been estabilished.
an engineer is designing a system that requires transporting .01 m3s of helium at 15degc and 120 kpa. the velocity of
An air bubble rises from the bottom of a well where the temperature is 25°C, to the surface where the temperature is 27°C. Find the percent increase in the volume of the bubble if the depth of the well is 5 m. Atmospheric pressure is 101,528 Pasca..
consider a naca 0009 airfoil that has a plain flap whose length is 0.2c and which is deflected 25. a. calculate cl and
Under what conditions would the use of carburetor heat be detrimental?
You want to know if you should replace the existing machines, which has a Cpk of 1.0. You decide to determine the Cpk for the new machines and make a decision on that basis.
a centrifuge bowl with 250mm internal diameter is turning at 4000 rmin. it contains a layer of aniline 50mm thick. if
Determine the power of the pump. The efficiency of the pump is 65%.
A hydraulic cylinder is 100mm diameter and is fed by a pipe 15mm in diameter. If the piston in the cylinder moves forward at a rate of 0.2ms^1
Air enters an adiabatic duct of L/D = 40 at V1 = 170 m/s and T1 = 300 K. The flow at the exit is choked. What is the average friction factor in the duct?
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