Mechanics of Materials: Lesson 48 - Stress Transformations Using the Equation Method

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Genius example of stress transformation with the barrel made of spiraled sheet metal 5:17

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thank you for these videos extremely helpful. im using a shigleys mechanical engineering design manual and the book uses the same equation for stress prime y as x but at a different angle which could be easily interpreted wrong. your method is a simpler and more reliable, well for me anyway.

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[@abolfazlmahyari]

Thank you for your courses. It's been really helpful to me, however sigma y' here is bigger than principle stress and I got different values using Mohr circle. I know your video is for two years ago but I'm getting crazy that I cant find answer for my problem.

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shouldnt we do a (θ+90) to calculate Tx'y'

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[@eduardomoreira7624]

The answer at the end is incorrect . He wrote 25 when it was 125 and the final answer should’ve been in tension 70.75MPa

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i came here for the concept though. the result is just based on inputting numbers, thats why we use computer program these days

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Congrats you can use a calculator

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@@J-Stew_64 it’s in case someone was comparing their answers that’s all. No need to bash me on it .

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from the formula, shouldnt it be 25, not 125 tho? since its -(sigma_x-sigma_y)/2

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