Engineering, 02.12.2019 20:31 kebo63

The manufacturer of a product that is subjected to repetitive cycles has specified that the product should be removed from service when any crack reaches 15% of the critical crack length required to cause fracture. consider a crack that is initially 0.02 mm long in a material with a fracture toughness of 55 mpa √m . the product is continuously cycled between compressive and tensile stresses of 300 mpa at a constant frequency. assume external cracks for which f = 1.12. the materials constants for these units are n = 3.4 and c = 2 × 10-11.
(a) what is the critical crack length required to cause fracture?
(b) how many cycles will it take for the product to be removed from service as specified by the manufacturer,
(c) assuming the specifications were not followed, how many cycles will it take for product to fail? (2+3+3 = 8 points)

Answers: 3

Show answers

Another question on Engineering

Engineering, 03.07.2019 15:10

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

Answer

Engineering, 04.07.2019 18:10

Slip occurs via two partial dislocations because of (a) the shorter path of the partial dislocation lines; (b) the lower energy state through partial dislocations; (c) the charge balance.

Answers: 1

Answer

Engineering, 04.07.2019 18:10

Assuming compressible flow of air and that the measurements are done at flagstaff a pitot static tube that gives the difference of total and static pressure measures 0.35 m of mercury. what is the velocity of air? assume the temperature to be 300k. (submit your excel or matlab calculation sheet)

Answers: 1

Answer

Engineering, 04.07.2019 18:10

Items are similar to the free issue items, but their access is limited. (clo5) a)-bin stock items free issue b)-bin stock controlled issue c)-critical or insurance spares d)-rebuildable spares e)-consumables

Answers: 1

Answer

You know the right answer?

The manufacturer of a product that is subjected to repetitive cycles has specified that the product...

Questions