Why isnt the temprature used in this equation?

what happens when w/wn > than sqrt(2)? what happens to the damping and why did it switch, like the lower the damping the lower the vibrations? What does the magnitude directly impact?

Details is following Fr=6000N Fa=3000N N=2400rpm Find the total life using data in question.

What is damping factor?

Match the steel microstructures to their names A B C

can you please find the solution question no:26

Explain Miner's Rule and discuss the limitation in applying Miner's Rule. An engine crankshaft is found to have the following fatigue life characteristics: At operating stress of 420MPa, the number of cycles to failure is 65 cycles. At operating stress of 360MPa, the number of cycles to failure is 390 cycles, and at operating stress of 130MPa, the number of cycles to failure is 11,900 cycles. (i) Apply Miner's Rule, find the fraction of life exhausted under each of the stress level. Determine how many times the following sequence can be repeated. Operating stress of 420MPa for 7 cycles, operating stress of 360MPa for 65 cycles, and operating stress of 130MPa for 325 cycles. Find the endurance limit and fatigue life corresponding to the stress amplitude of 675MPa from the SN curve for ultra-high strength steel TM210A test data as shown in Figure Q3, 795 775 # Material: TM210A Specimen: Smooth Test condition: Kt=1,R=-1 755 735 Fitting curve X Broken 715 0 Run out 695 675 655 635 615 595…