SW Simulation maps the constants as you assumed
C0 = CreepConst1
C1 = CreepConst1
C2 = CreepConst1
CT = CreepTC
To calculate these constants you need two sets of time, temperature and stress results to produce a given strain. An example of this for stainless steel can be found here http://www.fanagalo.co.za/tech/tech_grade_310.htm .
Once you have this data you have to solve the power law eqations as a set of simultaionus equations, so break out your old math books.
I hope this helps.
Have you had any success using creep analysis in 2009? I believe we have the proper creep constants for nylon and it always aborts on the first step (regardless of sing elim factor, conv tolerance etc). The cosntants we are using are:
CTC 0 (isothermal case)
Do you have a set of constants for any material that is known to work?
I have used the creep constants for the nylon and got a abort on the first step.
Now i have changed the convergence tolerance to .05 then it got solved.
Can you please send me the creep data's for nylon (i.e) any strain vs time curve
Is everything ok?
Could you please tell me if there's any source of creep datas?
Bumping this old post.
I have been searching and requesting data from our supplier (custom blender) and have come up empty on finding the proper time, temp, stress data on a 25% glass filled 66 nylon needed to calculate the creep constants. I have been able to come up with a creep modulus chart (BASF Ultramid materies are one of the few that list this information) for various stress levels at different temperatures over a time period. Is it valid to just solve with the much lower creep modulus and not use "include creep affects" and the C0, C1, C2?
For example the room temp tensile modulus is 1,200,000 psi. From this chart the room temp creep modulus at a 4,300 psi stress level at 10,000 hours is about 51,000 psi.