this post was submitted on 24 Jun 2024
349 points (98.3% liked)

Science Memes

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349
No going back (lemmy.world)
submitted 5 months ago by HootinNHollerin to c/[email protected]
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[–] [email protected] 56 points 5 months ago

Ah yes the part of the curve where the stress permanently changes you. Yeah, accurate.

[–] [email protected] 38 points 5 months ago (1 children)

this assumes a ductile material. I myself am smiling as though everything is fine in the elastic region and may snap at any moment.

[–] marcos 2 points 5 months ago (2 children)

What a fragile personality...

[–] [email protected] 9 points 5 months ago

brittle. brittle materials fail in the elastic portion of the stress strain diagram

[–] Ironfacebuster 4 points 5 months ago

Found the titanium personality

[–] [email protected] 34 points 5 months ago (2 children)

Can a TI-84slinger explain this for us pipette-wielders?

[–] HootinNHollerin 51 points 5 months ago (2 children)

Past the elastic deformation region / yield stress you get plastic deformation, which even when the stress is completely removed there is permanent deformation.

[–] [email protected] 15 points 5 months ago (2 children)

Gotcha. Thanks! Do the points P, E, Y, U, and F stand for something or are the letters arbitrary?

[–] Dettweiler42 35 points 5 months ago (2 children)

Plastic deformation point, elastic deformation point, yield point, ultimate strength, and failure point

[–] [email protected] 6 points 5 months ago

And here I was thinking it was: F U, yep.

[–] HootinNHollerin 9 points 5 months ago (2 children)

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.

[–] LeftRedditOnJul1 20 points 5 months ago

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

[–] andrewth09 11 points 5 months ago

Proportional limit. Deformation is linear up until this point.

[–] [email protected] 4 points 5 months ago

Looks like the plastic deformation point was placed before the elastic point.

[–] Dettweiler42 25 points 5 months ago

Everything past the dotted line is the point where the material won't go back to its original shape.
Example: You can push on the hood of your car all you want, it'll flex, and go back to its original shape (elastic deformation); but stand on it, and it'll dent (plastic deformation).

[–] FuglyDuck 18 points 5 months ago* (last edited 5 months ago)

"have you tried modeling this with something more flexible?" -The Project Manager.

[–] [email protected] 14 points 5 months ago

Manager "So all that you need is more strain to reduce the stress? Here are 10 more tasks which should strain you quite a bit"

[–] sga 10 points 5 months ago

Have considered recrystallisation ~~therapy~~

[–] [email protected] 10 points 5 months ago (1 children)

The plastic zone is no joke, my friend.

[–] FuglyDuck 1 points 5 months ago (1 children)

Is it sort of like the friend zone?

[–] [email protected] 2 points 5 months ago

Indeed, it leaves you forever deformed.

[–] [email protected] 6 points 5 months ago

The material is too ductile. I am at the peak of a narrow yield curve and then, snap, material breaks.

[–] SatansMaggotyCumFart 5 points 5 months ago (1 children)

I like plastic.

[–] [email protected] 8 points 5 months ago (1 children)

Well, do we have some good news for you about what's currently in your body...

[–] SatansMaggotyCumFart 2 points 5 months ago

Yeah when I jerk off I cum credit cards.

[–] captainlezbian 3 points 5 months ago

Ouch yes, very true, but ouch

[–] [email protected] 3 points 5 months ago

Well, mom, maybe write like a 60-year-old and not a 14-year-old and I'll respond.