Look at the following screenshots taken from four different jobs in abaqus for four Creep testing at different stress levels for HDPE using Norton's Law.
Q. Why have all jobs been aborted just around 1 hrs time despite low and high values of stress levels ?
Q. Usually, on experiments as well as simulations, creep time goes longer if stress level is small. Why is it almost same for my four stress levels ?
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These are warnings for all above mentioned simulation results.
1. A static analysis will ignore material data for creep or swelling.
2. The request for mises output will be replaced by a request for s output
3. Strain output request le is not valid for some elements in this analysis. This request is switched to the strain measure, e.
4. The nlgeom flag was not active in the previous general (non-perturbation) step. The activation of nlgeom in the current step may cause convergence problems if the displacements at the end of the previous general step are not small. Discontinuities in displacement response histories should also be expected.
And, program "aborts" in the end for too many iterations on some elements.
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These following are errors.
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look in the Att column of the monitor, ideally this whole column would be 1's, meaning that the increment is solved on the first attempt. It looks like your maximum number of attempts is set to 5, so the job aborts when it takes more than 5 attempts to solve that increment. You can maybe get around this by increasing the maximum number of attempts, but the fact that its going over the limit probably means something else is wrong
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