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1. Draw a representative volume element (RVE) for an epoxy matrix filled with cylindrical steel rods arranged in a rectangular array. Compute the volume fraction Vf as a function of the fiber diameter df and the spacing between the centers of the fibers ax and ay in the two directions (center to center).
2. Write a definition for Representative Volume Element. Draw a set of fibers in an hexagonal array: six fibers at the vertices of an hexagon plus one in the center, with the fibers touching each other. Draw the smallest RVE for this arrangement. Compute the fiber volume fraction.
A silicon nitride turbine rotor fractures at a stress level of 265 MPa. Estimate the range flaw sizes that could have been responsible for this failure.
Assuming that in Prob. 8.70 a right-handed thread is used on both rods A and B, determine the magnitude of the couple that must be applied to the sleeve in order to rotate it.
A first class lever in static equilibruim has a 50 lb resistance force and 15 lb effort force. The lever's effort force is located 4 ft from the fulcrum. What is the actual mechanical advantage of the system?
Compute the energy loss for gradual enlargements with cone angles from 2° to 60° in the increments shown in Fig. 10.5. For each case, water at 60°F is flowing at 85 gal/ min in a 2-in Schedule 40 steel pipe that enlarges to a 6-in Schedule 40 pipe..
As shown in Fig. 16.15, the water leaves the cup vertically downward in the form of an annular ring having an outside diameter of 4.00 in and an inside diameter of 3.80 in. Compute the external force required to hold the cup down.
steam enters a steady flow turbine at 30mpa 1000degc with a flow rate of 10kgs. thirty percent of the inlet mass of
For a control volume enclosing the nozzle only, determine the heat transfer, in kJ, and the change in specific entropy, in kJ/K, each per kg of carbon monoxide flowing through the nozzle. What additional information would be required to evaluate ..
It is 3.0 mm thick, 2.40 m long, and 2.40 m wide. In service it is subjected to a cyclic stress of ±700 MPa, which is not enough to cause yielding but does cause gradual crack growth of a preexisting crack normal to the loading direction at the ed..
Employing the ideal gas model, determine the change in specific entropy between the indicated states, in Btu/lbmol?ºR. Solve 2 ways: Use the appropriate ideal gas table AND also by using a constant specific heat value.
In which of the above standards would you expect to find information relating to the size of fillet welds required for steel fabrications? How often are ASME codes reviewed? Which code(s) are related to Dimensions of manufactured items?
Determine (a) the coefficient of performance of the heat pump. (b) the coefficient of performance of a reversible heat pump operating between hot and cold reservoirs at 708F and 308F, respectively, and the corresponding rate at which energy wo..
A project that will cost $750,000 will require payments as certain milestones are met. The initial payment is $50,000. When 30% of the work is complete an additional payment of $200,000 is due. When 70% of the work is complete another payment of $..
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