Shrinaath 0 Report post Posted January 29 hi i am getting an error what is the problem behind this my simulation goes on like this ELAPSED TIME= 451.37 s REMAINING TIME= 238056.46 s NC= 9500 T= 5.9868E-02 DT= 5.8914E-06 ERR= -0.5% DM/M= 0.0000E+00 ELAPSED TIME= 476.10 s REMAINING TIME= 238100.41 s RESTART FILES: bend_0001_[0001-0001].rst WRITTEN NC= 10000 T= 6.2957E-02 DT= 6.4528E-06 ERR= -0.6% DM/M= 0.0000E+00 ELAPSED TIME= 500.97 s REMAINING TIME= 238219.10 s NC= 10500 T= 6.6150E-02 DT= 5.8914E-06 ERR= -0.6% DM/M= 0.0000E+00 ELAPSED TIME= 529.13 s REMAINING TIME= 239438.85 s NC= 11000 T= 6.9340E-02 DT= 6.4528E-06 ERR= -0.6% DM/M= 0.0000E+00 ELAPSED TIME= 557.75 s REMAINING TIME= 240755.26 s NC= 11500 T= 7.2549E-02 DT= 6.4528E-06 ERR= -0.6% DM/M= 0.0000E+00 ELAPSED TIME= 584.23 s REMAINING TIME= 241002.99 s NC= 12000 T= 7.5685E-02 DT= 6.1558E-06 ERR= -0.6% DM/M= 0.0000E+00 ELAPSED TIME= 612.67 s REMAINING TIME= 242236.66 s Quote Share this post Link to post Share on other sites
Hyperman 286 Report post Posted January 29 Hi, the above simulation looks fine (energy and mass error, timestep evolution) and it is not obvious which error you are facing. Please share the model or at least the starter and engine *.out files. Quote Share this post Link to post Share on other sites
Shrinaath 0 Report post Posted January 30 hi remaining time is increasing there is no convergence is this might be because of element size??? i have done same simulation by applying steel property now i changed to aluminium this might because of time step and element size bend_0000.out bend_0000.rad bend_0001.rad Quote Share this post Link to post Share on other sites
Pooja S 18 Report post Posted January 30 Please share the .0001.out Quote Share this post Link to post Share on other sites
Shrinaath 0 Report post Posted January 30 hi thanks for replay some where in unit system, element length & time step i might have made mistake i think i used ton mm mpa s unit system i made mistake in density it is 2.63e-9 please change that and check the model file... bend_0001.out Quote Share this post Link to post Share on other sites
Pooja S 18 Report post Posted January 30 Hi shrinaath check load applied,load curve,run time and material parameter i have attached the file for reference . modify your file as per your requirement ( file doesn't have updated material value ) Bend_plate_0000.rad Bend_plate_0001.rad Quote Share this post Link to post Share on other sites
Hyperman 286 Report post Posted January 30 @Shrinaath 1. the error was because no Data: Var was defined for output blocks. 2. there are initial penetrations in the model (check with tool>penetration check). 3. the model does not follow a consistent set of units (check HEADER_CARD) 4. timestep imposed with mass scaling eas too high (leading to a high mass error). Acceptable mass addition is in the 1-2% range. 5. there is a possible incompatible kinematic condition. Plate_SPC is probably not constrained appropriately. 6. the remaining time increasing (from the first post) is due to the decrease in available computational resources (Windows Task Manager>processes>CPU) during computation- you probably opened some program that decreased available CPU. Remaining time increasing could also be because of timestep dropping (in your case it was stable) due to either contacts penalty stiffness or characteristic length of elements decreasing because of large deformation. bend_plate_edit_0001.rad bend_plate_edit_0000.rad Quote Share this post Link to post Share on other sites