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If necking initiated at 80% of the total elongation, prior to this point the specimen deformation is uniform, compute the true stress at the point f necking initiation.
Provide a 3D sketch of the plane (112) in a bcc crystal and identify the specific <111> type lattice translation lying within the (112) plane.
Calculate the 1D atomic packing fractions or APFs in the [100], [110], and [111] directions in the fcc structure. Calculate the 2D atomic packing fractions or APFs in the (100), (110), and (111) plane
Diffusive jumps of the atom at the origin will be made to one of its nearest neighbor positions. List all 12 lattice translation vectors defined by these nearest neighbor atom jumps.
If P=150kN, determine the elastic elongation of rod BC and the decrease in its diameter. Rod BC is made of A-36 steel and has a diameter of 40mm.
What Pressure is needed to isothermally compress ice initially at -5C and 1 bar so that it changes phase? I don't even know how to approach this problem since it's a solid-liquid at non standard sta
The load at point bis not allowed to swing more than 4 m horizontally when the crane is brought to a sudden stop. Find the max speed of the crane.
The R-134a enters the valve as saturated liquid at a pressure of 20 bar and exits at 1 bar. For this process determine the temperature at the outlet (°F).
A shock absorber is to be designed to limit its overshoot to 15 percent of its initial displacement when released. Find the damping ratio ε0 required. What will be the overshoot if &epsilon
A crate sliding down a ramp reaches the bottom of the ramp and slides across a flat floor. At an instant after reaching the floor, the crate has a speed of v_1 = 8.50 m/s.
A swimming pool is heated by a gas-fired heater that supplies 200,000 Btu/hr to the water. The pool is rectangular, 15 ft by 30 ft, with an average depth of 5 ft.
A gas contained within a piston-cylinder assembly undergoes three processes in series: Process 1-2: Constant volume from state 1 where p1 = 1 bar, V1 = 4 m3 to state 2, where p2 = 2 bar.
Nickel has a FCC crystal structure and 0.125 nm atomic radius. Draw two nearest parallel (110) planes in a FCC crystal, and calculate their interplanar spacing. Calculate the interplanar spacing for
Air enters a set of these nozzles at 215 psia and 700 degrees F with a velocity of 79 ft/s and exits at 160 psia and 645 degrees F. Calculate the velocity at the exit of the nozzles.
Steam expands isentropically from 2 MPa and 500 K to a final state in which the quality is 0.90. Determine the final state temperature, pressure, and specific volume.
Consider an ocean thermal energy conversion power plant in Hawaii designed to operate between temperature limits of 90°F (ocean surface) and 40°F (deep ocean). Calculate thermal efficiency
The power output of an adiabatic steam turbine is 5.5 MW. At the inlet, P = 2.0 MPa and T = 435 °C. The steam enters the turbine with a velocity of 50 m/s. The elevation of the inlet is 15 m. At
Find the elapsed time to vaporize the propane and total work produced. Also find theoretically maximum possible total work output for the given QCOLD, WREV,MAX.
Find the actual cycle coefficient of performance, the rate of waste heat rejection (kJ/hr) and electrical cost per hour. Repeat/Compare results for COP, waste heat rate (kJ/hr) and operating cost.
A pump steadily draws water through a pipe from a reservoir at a volumetric flow rate of 22 gallons per minute. At the pipe inlet, the pressure is 14.7 psi, the temperature is 68 °F, and the vel
Air at 110 kPa and 250 K is compressed steadily to 570 kPa and 400 K. The mass flow rate of air through the compressor is 0.03 kg/s. A heat loss of 16 kJ/kg occurs during the process.
Consider two reversible refrigerators operating in series. Determine the temperature (°C) of the intermediate reservoir.
Link BC is 6 mm thick and is made of a steel with a 450-MPa ultimate strength in tension. What should be its width w if the structure is being designed to support a 20-kN load P with a factor safet
It is found that ozone reaction in water nearly follows first-order kinetics in ozone concentration decreases by 50% in 12 minutes (t1/2 = 12 min).