steel02 isotropic strain hardening parameters

seyedalirezajalali · Post by **seyedalirezajalali** » Mon Mar 30, 2009 11:00 am

Hi,
would you please help me solving this problem?
I am trying to use steel02 material as an element force-deformation response. the element's yield strength starts to deteriorate after a deformation of .04 . I want to use steel02 material isotropic strain hardening parameters a1, a2, a3, and a4 but the mentioned decrease starts at earlier points than I desire. can you tell me how should I set the parameters to get the deterioration start exactly at the needed point?
thank you

silvia · Post by **silvia** » Sun Apr 05, 2009 12:22 pm

that's a tough one because i haven't used it much and these materials have not been well documented by the author, yet.
you should play around with it a little, research those parameters and/or look at the source code.

seyedalirezajalali · Post by **seyedalirezajalali** » Wed Apr 08, 2009 12:22 am

Thank you.

I could find the answer.
the formulation given in the manual for calculating the isotropic strain hardening is not correct and appears that it should be modified to the below formula which I found in literature:
SIGMAst= SIGMAy*a2*(EPSILONmax/EPSILONy-a3)

Regards
Alireza Jalali