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suppose that a wing component on an aircraft is fabricated from an aluminum alloy that has a plane strain fracture toughness of 26 MPa. It has been determined that fracture results at a stress of 112 MPa when the maximum internal crack length is 8.6 mm long. For this same component and alloy, compute the stress level at which fracture will occur for a critical internal crack length of 6.0mm.
During the process, the pressure and specific volume are related by pv = constant. For the refrigerant, determine the work and heat transfer per unit mass, each in KJ/kg.
The effect on temperature and density of air under adiabatic compression, Air is going through a compressor
A steel rod 1 cm in diameter and 30 cm long protrudes from a steel surface at 150 C. The rod is surrounded by air at 10 C with a convective heat transfer coefficient of 10 W/m2 C. The thermal conductivity of steel is 114 W/m C. Determine the heat ..
Calculating the mechanical properties of unidirectionally reinforced composites
Find the compression ratio, cutoff ratio, the thermal efficiency, the mean effective pressure, and the P -v and T-s diagrams clearly showing all corners.
Refrigerant R-134a vapor in a piston-cylinder assembly undergoes a constant-pressure process from saturated vapor at 800 kPa to 50 ºC.
one part of the tank contain 2.5 kg of compressed liquid water at 60 C and 600 kPa while the other part is evacuated. the partition is now removed, and the water expands to fill the entire tank. Determine the final temperature of the water and the..
Estimate the minimum bar diameter to prevent fatigue failure.
Consider a cold air-standard Diesel cycle. Operating data at principal states in the cycle are given in the table below.For k=1.4 Cv=0.718kJ/(kg*k), and Cp= 1.005 kJ/(kg*K)
find a) velocity distribution in the film b) shear stress distribution c) volumetric rate of flow d) average velocity. assume the flow is steady and laminar.
Determine the total heat transfer and the total work(kj). and show the T-V diagram.
Estimate the temperature of the hottest point in the billet after five minutes of quenching. Neglect end effects; make the calculation for a cylinder of the given diameter but of infinite length.
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