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Design a four-dwell cam to move a follower of mass= 3 kg from 0 to 40 mm in 40°, dwell for 100°, fall20 mm in 90°, dwell for 20°, fall 10 mm in 30°, dwell for 40°, fall 10 mm in 30°, and dwell for the remainder. The total cycle must take 10 sec. Choose suitable programs for rise and fall to minimize dynamic forces and torques. Size a return spring and specify its preload to maintain contact between cam and follower. Calculate and plot the dynamic force and torque. Assume damping of 0.25 times critical. Repeat for a form-closed cam. Compare the dynamic force, torque, and natural frequency for the form-closed design and the force-closed design.
in a gas turbine operating at a steady state air enters the compressor with a mass flow rate of 5 kgs at .95 bar and 22
A vibrating spring-mass system has a measured acceleration amplitude of 8 mm/s2 and measured displacement amplitude of 2 mm. Calculate the system's natural frequency.
r-134a is contained in a vertical cylinder fitted with a frictionless piston and a set of stops and the volum is 0.05m3
a circular specimen of mgo is loaded using a three point bending mode. compute the minimumnbsppossible radius of the
Water enters the pump of a steam power plant as saturated liquit at 20kpa at a rate of 45kg/s and exits at 6mpa. Neglecting KE and PE changes and assuming the process is reversible, determine the power input of the pump
a cylindrical duct supplies 1.20 kgs of combustion air at 150 c and 95.0 kpa to a furnace. if the velocity of the air
an individual presently owns an oil lease. the payments from this lease beginning at the end of this year are 10000
It is necessary to select a metal alloy for an application that requires a yield strength of at least 310 MPa (45,000 psi) while main- taining a minimum ductility (%EL) of 27%. If the metal may be cold worked, decide which of the following are can..
liquid sodium leaves a nuclear reactor at 80 degrees celsius and is used as the energy source in a steam power plant.
The compressor in a plant receives carbon dioxide at 100 kPa, 280 K at a low velocity. At the compressor exit the carbon dioxide is at 1100 kPa and 500 K with a velocity of 25 m/s. The carbon dioxide then flows into an isobaric heat exchanger where i..
Determine the number of independent slip systems for crystals with each of the following combinations of slip systems. (The simplest way to do this is to de- termine how many of the strains ε1, ε2, γ 23, γ 31, and γ 12 can be independently imposed ..
the fracture strength of glass may be increased by etching away a thin surface layer. it is believed that the etching
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