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For 4340 steel, the fracture toughness and yield strength depend on the prior heat treatment, as shown in Figure. As yield strength is increased, the fracture toughness decreases. A pipeline is to be built of this steel and to minimize the wall thickness of the pipe, the stress in the walls should be as high as possible without either fracture or yielding. Inspection techniques ensure that there are no cracks longer than 2 mm (a = 1 mm). What level of yield strength should be speci?ed? Assume a geometric constant of f = 1.15.
bar ab of mass m and mass moment of inertia i 112ml2 is constrained to move within the channel as shown. the bar is
fe transforms from a bcc to fcc crystal structure at around 911 degrees c. fcc fe has an atomic radius .129 nm. what is
assuming that the diameters of 1000 brass plugs taken consecutively from a machine form a normal distribution with
water flows through a shower head steadily at a rate of 10lmin. an electric resistance heater placed in the water pipe
Heat loss from an insulated pipe, a standard schedule 40, 2-in. steel pipe (inside diameter 2.067 in. and wall thickness 0.154 in.) carrying steam is insulated with 2 in. of 85% magnesia covered in turn with 2 in. of cork. Estimate the heat loss p..
A 514.0 g/hr stream of liquid methyl alcohol, also called methanol, (CH3OH) at 6.80 atm and 36.0°C was held at constant pressure, vaporized and brought to 240.0°C. At what rate must heat be supplied to this system? Assume that methyl alcohol vapor be..
Heat is generated uniformly in the fuel rod of a nuclear reactor. The rod has a long, hollow cylindrical shape with its inner and outer surfaces at temperatures of Ti and To, respectively. Derive an expression for the temperature distribution.
The maximum allowable pipe velocity is 3 m=s, the length of the line is 1500 m, and the difference in elevation between the reservoirs is 30 m. Assume f ¼ 0.02 and K ¼ 0.5.
a part subjected to a stress of 50 ksi may experience a single edge surface crack no longer than 0.015 in. which if
A rigid container of 0.1 m3 and negligible heat capacity contains steam at 500 kPa and 400C. If the container is cooled, determine the pressure and temperature at which steam starts to condense. Determine also the amount of heat removed during the co..
terminal speed for various objects falling through airmass cross-sectional area vtobject kg m2 msskydiver 75 0.70
one half cell of an electrochemical cell consists of a pure iron electrode in a solution of fe2 the other is a tin
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