Deformation Plasticity
Deformation Plasticity
(OP)
Hi FEM guys and girls!
First: Sorry for my English! :)
Second: I need heeeeeelpppp!!! :(
Third: I need to know how ----> after my simulation in which I defined the material of my object (density and deformation plasticity), what I have to see to verify the presence of plasticity in my object???
I need to stay in the elastic range but...to verify it?
Is it correct to consider the voice "plastic strain in integration points"????
Help me pleaseeeeeeeee!!!
Thanks!
;)
Leo
First: Sorry for my English! :)
Second: I need heeeeeelpppp!!! :(
Third: I need to know how ----> after my simulation in which I defined the material of my object (density and deformation plasticity), what I have to see to verify the presence of plasticity in my object???
I need to stay in the elastic range but...to verify it?
Is it correct to consider the voice "plastic strain in integration points"????
Help me pleaseeeeeeeee!!!
Thanks!
;)
Leo





RE: Deformation Plasticity
Martin Stokes CEng MIMechE
RE: Deformation Plasticity
RE: Deformation Plasticity
if I Try doing a contour plot of PEEQ in Viewer for high loads I see the presence of plasticity...but...why my Von Mises values and the Components values are under the yield stress point of my material???????
I understand this fact as a contradiction!?
RE: Deformation Plasticity
corus
RE: Deformation Plasticity
- Elastic
- Plastic ------> but i haven't a stress-strain curve for my material. I know only the stress yield, the stress ultimate yield, the elasticity module, and the elongation at break. For this reason i entered in the voice plastic the datums:
Yield stress Plastic Strain
Rp0.2 0
Rultimate elongation at break
Doing this I don't see plasticity in my model for upper loads too.
But...this second way to modelize my object is correct????
It brings my simulation to differents results!!!
....I'm hopeless....:(
Leo
RE: Deformation Plasticity
corus
RE: Deformation Plasticity
If you specify Intial Plastic strain and your material remain elastic then PEEQ will have value. In Cam Clay, PEEQ is a pressure value representing the position of the cap. If there is confusion, I would judge the plasticity of the material by the Plastic Strain PE magnitude.