Engineering, 28.02.2021 16:40, Prettygirlyaya
Derive a basic analytical model for the volume build rate of a direct, single-laser SL process in terms of the following parameters: Effective laser spot size, the cured line width on the surface (Lw) and scan speed (V); liquid resin layer thickness (Zr) and cure (volume) shrinkage (S); and the time per layer to configure the liquid, wiper time (tw). Assume neighboring tracks are just touching (not overlapping). Apply this model to the following problems:
a. For Zr = Lw = 0.1 mm, Vs = 2000 mm/s, and S = 15 vol %, what is the volume build rate per hour, neglecting the wiper time.
b. From (a), calculate the time to build a single 10 x 10 cm layer and a 10-cm cube (= 1 L).
c. For what wiper cycle time, does the wiper time add 10% to the total time in this case.
d. For what (smaller) layer area does the wiper time double the total time.
Answers: 1
Engineering, 03.07.2019 14:10, bryneosburn
Line joining liquid phase with liquid and solid phase mixture is known as: a) liquidus b) solidus c) tie line d) none of the mentioned
Answers: 2
Engineering, 03.07.2019 15:10, breannaasmith1122
Two flowing streams of argon gas are adiabatically mixed to form a single flow/stream. one stream is 1.5 kg/s at 400 kpa and 200 c while the second stream is 2kg/s at 500 kpa and 100 ? . it is stated that the exit state of the mixed single flow of argon gas is 150 c and 300 kpa. assuming there is no work output or input during the mixing process, does this process violate either the first or the second law or both? explain and state all your assumptions.
Answers: 1
Engineering, 04.07.2019 19:20, carterdaw
Aseries piping system conveys methyl alcohol. the system consists of 70 m of 1- nominal pipe follow by 50 m of 2-nominal pipe, both schedule 40 commercial steel. the 1-nominal pipe contains 3 90° elbows (regular) anda fully open gate valve, all threaded. the pressure drop through the system is 150 kpa. determine the volume flow rate through the system that is horizontally laid.
Answers: 1
Derive a basic analytical model for the volume build rate of a direct, single-laser SL process in te...
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