Hi all
I am currently investigating Prager hardening room which is stated as the simplist linear kinematic hardening rule. I was wondering if anyone has worked with this model and if so if you have managed to identify how to determine the constant used for the back stress equation
dα =C * dεp ( this is epsilon dot p which is the equivalent plastic strain)
Please can you let me know how to determine the constant C from experimental results?
Plastic modulus
Hi,
You can calculate the value of 'C' from hardening modulus 'H'. For von-Mises yield function, the relation between 'H' and 'C' is,
H=(3/2)*C
Here, 'H' is slope of the line between sigma and plastic strain in uniaxial loading. Since 'H' can be determined from experiments, 'C' can be found.
I hope this helps,
Best regards,
- Ramadas