Real deformation in Finite element analysis
Real deformation in Finite element analysis
(OP)
Hi,
Consider two analysis of Finite element model:
1-Linear Elastic (Large deformation is off)
2-Elastic-plastic analysis of a same model (large deformation is on)
Which one shows us the real deformation of a component? it is so important for me according to design the sealing zone of component.
Regards
Consider two analysis of Finite element model:
1-Linear Elastic (Large deformation is off)
2-Elastic-plastic analysis of a same model (large deformation is on)
Which one shows us the real deformation of a component? it is so important for me according to design the sealing zone of component.
Regards





RE: Real deformation in Finite element analysis
RE: Real deformation in Finite element analysis
Absolutely in Elastic analysis the max stress amplitude is more than E-P analysis although both of them in Concentrations are greater than yield.
RE: Real deformation in Finite element analysis
Since you elastic stresses exceed yield, then your real deformation is more likely to resemble the E-P analysis. This is because beyond the yield stress, the behaviour is no longer linear-elastic, but has a function involving the tangent modulus of the non-linear components of the stress-strain cure. Does that make sense?
RE: Real deformation in Finite element analysis
So i understood, when we assign a tangent modulus to our model with large deformation(E-p Analysis), we will have a deformation which in reality will happen and this is the reliable value.
And as you said, stresses in E-p analysis are not reliable but i thought that elastic analysis give us a theoretical value and in reality, stresses in concentrations are self-equilibrium and because of strain-hardening characters, they can't grow up such in elastic analysis happen!