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Norton Creep parameters
Posted 11 lug 2013, 08:38 GMT-4 Structural Mechanics Version 4.3b 0 Replies
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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
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Hello Samira Es
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