Engineering, 14.04.2020 15:55 xarianna2007
In a previous homework, we determined that a tunnel (through-thickness) crack (Y=3.36) of length 16 mm growing from a 12 mm radius hole in a thick plate of 302 stainless steel (18Cr-8Ni) that has the properties listed below, could withstand a stress of 260 MPa perpendicular to the crack before instantaneous failure? What much lower nominal stress would cause the initiation of stress corrosion cracking in this same situation if the sample were exposed to a 42% MgCl2 solution?
Answers: 1
Engineering, 04.07.2019 18:10
Ajournal bearing has a journal diameter of 3.250 in with a unilateral tolerance of 20.003 in. the bushing bore has a diameter of 3.256 in and a unilateral tolerance of 0.004 in. the bushing is 2.8 in long and supports a 700-lbf load. the journal speed is 900 rev/min. find the minimum oil film thickness and the maximum film pressure for both sae 20 and sae 20w-30 lubricants, for the tightest assembly if the operating film temperature is 160°f. a computer code is appropriate for solving this problem.
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Engineering, 04.07.2019 18:20
Vibration monitoring this technique uses the noise or vibration created by mechanical equipment and in seme cases by plant systems to detemine their actual condtion. a)- true b)- false
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Engineering, 06.07.2019 04:10
Cold water (cp=4180j/kg k) leadıng to a shower enters a thin-walled double-pipe heat transfer at 15c at a rate of 0.25kg/s and is heated to 45c by hot water (cp=4190j/kg k) that enters at 100c at the rate of 3kg/s. if the overall heat transfer coefficient is 950w /m2 k , determıne the rate of heat transfer and the heat transfer surface area of the heat exchanger using e - ntu method
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Engineering, 06.07.2019 04:20
Consider a spherical container of inner radius , outer radius r2, and thermal conductivity k. express the boundary condition on the inner surface of the container for steady one-dimensional conduction for the following cases: (a) specified temperature of 50°c, (b) specified heat flux of 30 w/m2 toward the center, (c) convection to a medium at t with a heat transfer coefficient of h
Answers: 2
In a previous homework, we determined that a tunnel (through-thickness) crack (Y=3.36) of length 16...
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