A cylindrical part is warm upset compressed by forging in an open die. Before forging, the diameter axially is 20mm and the height is 60mm. The coefficient of friction at the die-work interface is 0.20. The flow curve of the work material at forging temperature is defined by a strength coefficient of K is 530MPa, and a strain-hardening exponent of n is 0.23. Assume the volume of the part remained unchanged during the whole process and no barreling effects.

a. The maximum strain of the part is 0.485. What is the maximum area of contact between the die and the part?
b. What is the maximum force required to forge this part to its maximum area?

Two technicians are discussing the intake air temperature (iat) sensor. technician a says that the computer uses the iat sensor as a backup to the engine coolant temperature (ect) sensor. technician b says that the powertrain control module (pcm) will subtract the calculated amount of fuel if the air measures hot. who is correct

Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.

The higher the astm grain-size number, the coarser the grain is. a)-true b)-false