6-3 A steel rotating-beam test specimen has an ultimate strength of 120 kpsi. Estimate the life...

A steel rotating-beam test specimen has an ultimate strength of 120 kpsi. Estimate the life of the specimen if it is tested at a completely reversed stress amplitude of 70 kpsi.
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Book: Shigley's Mechanical Engineering Design 11th Edition
Author: Richard Budynas | Keith Nisbett
ISBN-13: 978-0073398211
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[@matthewmills6468]

Really clear way of explaining this style of question man!
Got far more out of your explanation than from my lecturer.
Thanks

[@derpyderp5396]

thx for your help!

[@TheEngineeringWei]

Happy to help!

[@thetuesdayfiles]

Great vid!

[@automaticmonkTV]

what if S_ut > 200kpsi