Reproducibility of results? (Multicrack analyses)

[Low12]

Hey abaqus professionals,

i have a question regarding reproducibility of results. I am conducting multicrack analyses in form of an indentation test (ABAQUS 2019) and most of them abort quite early due to convergence issues. A few weeks back a simulation managed to run through. I have the input file and i ran it again, but now, the simulation aborts very early. How could it be possible, that the same input file leads to different results? Maybe multicrack analyses are too sensitive?

Im sure it is not the case, but lets say the input file ist not the same and some values have been changed: is ist possible, to get an input file out of and .odb file ? (kind of the "reverse engineering" approach?)

See picture, left is the current simulation, right the results from a few weeks back. Input file should be the same, as well as CPU used and abq version used.

I would be happy about any tips and thanks in advance.

 

[FEA way]

You can compare the input files using some text editor. For example Notepad++ has Compare plug-in. This way you will find any differences between these files. You can also compare output files (msg, dat, sta) to see if something was different in solution procedure.