Past the elastic deformation region / yield stress you get plastic deformation, which even when the stress is completely removed there is permanent deformation.
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
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).
28 Comments
Kyrrrr@lemmynsfw.com · 56 pts · 2y
Ah yes the part of the curve where the stress permanently changes you. Yeah, accurate.
elbowgrease@lemm.ee · 38 pts · 2y
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@lemmy.world · 2 pts · 2y
What a fragile personality...
elbowgrease@lemm.ee · 9 pts · 2y
brittle. brittle materials fail in the elastic portion of the stress strain diagram
Ironfacebuster@lemmy.world · 4 pts · 2y
Found the titanium personality
Rubisco@slrpnk.net · 34 pts · 2y
Can a TI-84slinger explain this for us pipette-wielders?
HootinNHollerin@lemmy.world · 51 pts · 2y
Past the elastic deformation region / yield stress you get plastic deformation, which even when the stress is completely removed there is permanent deformation.
Rubisco@slrpnk.net · 15 pts · 2y
Gotcha. Thanks! Do the points P, E, Y, U, and F stand for something or are the letters arbitrary?
Dettweiler42@lemmy.world · 35 pts · 2y
Plastic deformation point, elastic deformation point, yield point, ultimate strength, and failure point
Rubisco@slrpnk.net · 16 pts · 2y
Dave@lemmy.nz · 6 pts · 2y
And here I was thinking it was: F U, yep.
HootinNHollerin@lemmy.world · 9 pts · 2y
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@lemmy.world · 20 pts · 2y
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@lemmy.world · 11 pts · 2y
Proportional limit. Deformation is linear up until this point.
Someonelol@lemmy.dbzer0.com · 4 pts · 2y
Looks like the plastic deformation point was placed before the elastic point.
Dettweiler42@lemmy.world · 25 pts · 2y
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@lemmy.world · 18 pts · 2y
"have you tried modeling this with something more flexible?" -The Project Manager.
Huschke@programming.dev · 14 pts · 2y
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"
Aurenkin@sh.itjust.works · 10 pts · 2y
The plastic zone is no joke, my friend.
FuglyDuck@lemmy.world · 1 pts · 2y
Is it sort of like the friend zone?
Aurenkin@sh.itjust.works · 2 pts · 2y
Indeed, it leaves you forever deformed.
sga@lemmy.world · 10 pts · 2y
Have considered recrystallisation
therapyfckreddit@lemmy.ml · 6 pts · 2y
The material is too ductile. I am at the peak of a narrow yield curve and then, snap, material breaks.
SatansMaggotyCumFart@lemmy.world · 5 pts · 2y
I like plastic.
NakariLexfortaine@lemm.ee · 8 pts · 2y
Well, do we have some good news for you about what's currently in your body...
SatansMaggotyCumFart@lemmy.world · 2 pts · 2y
Yeah when I jerk off I cum credit cards.
captainlezbian@lemmy.world · 3 pts · 2y
Ouch yes, very true, but ouch
corsicanguppy@lemmy.ca · 3 pts · 2y
Well, mom, maybe write like a 60-year-old and not a 14-year-old and I'll respond.