Dear Jorgen,
I am trying to perform simulations for the buckling colapse of HDPE liners used in oil transportation (during colapse the material undergoes plastic deformation).
When tested in uniaxial tension, this material exhibits necking. Therefore, do you think the Hybrid Model (Bergstrm - 2001) will be appropriate for this material?
Otherwise, which model would you suggest for this application?
Thank you very much in advance.
Regards, Juan.