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(lemmy.world)
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this post was submitted on 24 Jun 2024
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Past the elastic deformation region / yield stress you get plastic deformation, which even when the stress is completely removed there is permanent deformation.
Gotcha. Thanks! Do the points P, E, Y, U, and F stand for something or are the letters arbitrary?
E is where it stops being linear, Y is yield, U is ultimate as in max, and f is fracture / failure. Not sure about p.
P is the Proportional Limit, where it stops being linear, but remains elastic for a short while longer, meaning any deformation can still be recovered. E is the Elastic Limit, where it changes from elastic to plastic