Learning Forum

[amir.mb1377]

Hello,in lsdyna softwar. I have two parts made of different materials. But they are connected, I made each of the materials separately. But I want to connect these two together. how can i do?

[Jim Day]

You can either merge the two parts or tie the two parts. Merging means sharing of nodes at the interface. Tying means using *CONTACT_TIED_SURFACE_TO_SURFACE (or similar) to join the two parts at their interface.

[amir.mb1377]

Hello, Jim day,

can you send me a video so I can learn how to apply it?

[Jim Day]

Google "example of tied contact in LS-DYNA".

[amir.mb1377]

Hi Jim

One of my parts is shell and the other is solid. Can I still use CONTACT_TIED_SURFACE_TO_SURFACE?

[Jim Day]

Depending on your geometry, that may still work fine. It won't consider the rotational DOF of the shell nodes however. Alternatively, you could try *CONSTRAINED_TIED_SHELL_EDGE_TO_SURFACE_CONSTRAINED_OFFSET. Try these contact types and report back if the contact doesn't appear to be working.

[amir.mb1377]

Hello How considering 3 series elements for mat-197 ??

[Jim Day]

Post this question separately as a new topic and describe in more detail.