Engineering, 02.11.2019 06:31 joey333
Acritical component for a mechanical system will be subjected to a 0.01 hz cyclical stress during operation (0.01 cycles per second). the stress will fluctuate between a tensile load of 150 mpa and a compressive load of -250 mpa. the design calls for a survival rate of 90% (i. e. 10% failure rate acceptable). approximately how long, in days, can the component be used before it must be replaced during maintenance ? answer format: x (no decimal) answer unit: day the fatigue lifetime curves (for various confidence intervals) for the material are given below. if you don't immediately recall, you should be able to conceptually discern whether the "p = x" label indicates a probability of failure or survival. note on this figure, s stands for stress amplitude.
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Engineering, 04.07.2019 18:10
Acompressor receives the shaft work to decrease the pressure of the fluid. a)- true b)- false
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Engineering, 04.07.2019 18:10
Fluids at rest possess no flow energy. a)- true b)- false
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Engineering, 04.07.2019 18:10
Shafts are machine elements that are used to a) carry axial loads b) direct shear loads c) transmit power d) rotate at constant speed e) none of the above circular and square shafts subjected to the same torque under the same circum behave a) the same way b) almost the same way
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Engineering, 04.07.2019 18:20
Steam enters a converging nozzle at 3.0 mpa and 500Β°c with a at 1.8 mpa. for a nozzle exit area of 32 cm2, determine the exit velocity, mass flow rate, and exit mach number if the nozzle: negligible velocity, and it exits (a) is isentropic (b) has an efficiency of 94 percent
Answers: 2
Acritical component for a mechanical system will be subjected to a 0.01 hz cyclical stress during op...
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