Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.
Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.
Norton Creep parameters
Posted 11.07.2013, 08:38 GMT-4 Structural Mechanics Version 4.3b 0 Replies
Please login with a confirmed email address before reporting spam
I'm going to simulate creep of polymer by using Norton model in situation which temperature and applied force are constant.
I've got question regarding parameters in Norton creep model. I appreciate any hints which could help me.
I need parameters 'creep rate coefficient', 'reference stress for creep' and 'Stress exponent'.
First, I found the ''stress exponent'' from graph of natural logarithm of strain rate versus natural logarithm of stress.
Then I used the attached relation to calculate 'Creep rate coefficient'. But the point is that the unit of the calculated
creep rate coefficient (A) is (1/(s.pa^n)).
If the procedure is right, what is the right value for A with unit (1/s) and the value for ''reference stress for creep'' (pa)?
Another question is that, is it possible that stress exponent be less than 1?
Best regards,
Samira
Attachments:
Hello Samira Es
Your Discussion has gone 30 days without a reply. If you still need help with COMSOL and have an on-subscription license, please visit our Support Center for help.
If you do not hold an on-subscription license, you may find an answer in another Discussion or in the Knowledge Base.