Learning Forum

[Okkar Kyaw]

Is it possible for LS-DYNA version R14 itself to have some bugs? I run old files in newer version as I doubted this. For example, when MAT Erosion is used with Titles, and run in LS solver all the input values shift down one row and the material failure didn't occur. (I have to make the simulation without title)

Another example is that SOLID SPG with IDAM 1 and FS 0.002 works in R11, but the same keyword file fails to show failure in R14.

One more example is In tension failure analysis, element deletion didn't happen as it is supposed to. In the figure, the element at the tip has to be deleted first. (It works fine with older version.)

[Reno Genest]

Hello Okkar,

LS-DYNA is continually evolving and it is possible to get different results with different versions of LS-DYNA. You may have to recalibrate your material models with newer versions of LS-DYNA to match the failure seen in experimental data.

Have you tried to save the input.k file in the R14 format with LS-PrePost before running with R14? This may help with the formating issue:

 

You can give more details about one of the examples you talk about and we may be able to better help you. 

If you want to use the same input files, the best would be to stick to the solver you used in the past (R11 for example).

 

Let me know how it goes.

 

Reno.