Hi,
I have a model which includes damage propagation,heat transfer and effect of humidity. For damage analysis I'm using a UEL, and for the rest I'm doing a coupled thermal- displacement(CTD) analysis using UMAT and UEXPAN. The analysis starts with applying a load of humidity and temperature from 0 to a final value, and then in STEP2 I apply a cyclic load in a same range.
If I run the model for each of the cases (Damage or CTD) seperately, it finishes in a reasonable time [less than an hour], and the results are correct. However, when I combine them, the cyclic part (step 2) takes very long time [more than 2 days] with very small time increment.
Could anybody please comment on this? Am I doing sth wrong? I even tried to modify my Amplitude file to have smaller time spans, it helped but not too much.
Thank you,
Roshanak