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The main shaft in an industrial bread dough mixer is subjected to an alternating bending stress due to the pulley drive system sigma a and an additional mean bending stress when mixing dough sigma m. The shaft is made from a commercially polished steel Phi 1.5" Times 72", with E = 30 msi, Sy = 80 ksi, Su = 100 ksi Construct the S-N curve for the shaft Construct the 106 and 103 constant-life curves (Goodman Diagram) If on average the ratio of mean stress to alternating stress is 1, sigma a/ sigma m = 1, what is the maxi mu m stress allowable to achieve 106 life? (Estimate from your graph) What surface treatment(s) would you recommend to improve shaft fatigue life?
A fire truck draws water from an open constant-level reservoir through a hose of 0.2 ft2 cross section. The water is discharged from the pump through another 0.2 ft2 hose to a surge tank pressurized to 120 psig with air at the top. The pump adds 970 ..
1 a closed container contains a third liquid water by volume and the rest of the volume is vapor. select the best
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Drip irrigation is a means of getting water directly to growing plants with very little waste. One method uses a large-diameter polyethylene "mother" tube (10-15 mm i.d.) from which lead many small diameter polyethylene feeder tubes, called drippers,..
A paperclip is made of wire 1.25mm in diameter. If the original material from which the wire is made was 15mm in diameter, calculate the longitudinal and diametrical engineering and true strains that the wire has undergone during processing.
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an interest rate of 10 compounded continuously is desired on an investment of 15000. how many years will be required to
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