Learning Forum

[javat33489]

Hi all.

I'm simulating drilling. The first time I made a model as in the test version of LSTC:

 

 

Everything worked.

Now I made another model, in the form of a drill tip for concrete. And when I set rotation to the upper segment of the drill, the mesh is distorted. Why? I use exactly the same settings when I used a model like the LSTC. In the LSTC model, the drill did not touch the SPG (not lagrange mesh) die, but in the new model I made contact, could this be a problem? But if I turn off rotation and leave only translation, the drill doesn't distort:

 

 

But if I turn off rotation and leave only translation, the drill doesn't distort:

 

 

In addition, the drill compresses strongly when touched, although it is steel and the LNG die is made of concrete. Previously, this did not happen with the same settings:

 

HELP PLEASE

[Tonmoy]

Hi javat33489,

 

Though I can’t help you with your problem, I’m interested to know how did you do the mesh? Did you use the LS-PrePost or did you use third party meshing tools out there?

Thanks!

 

- Tonmoy.

 

 

[javat33489]

Sir, I made the mesh in LS-Dyna ACT in Workbench.

[javat33489]

sir, I also tried to build a grid in the LS-Dyna perpost:

[javat33489]

Sir, I also tried changing the rotation speed to advance (revolutions) for the test, still the same(

[javat33489]

Sir, I even tried not to rotate the drill and not to move, but to move the SPG die, but then they are greatly distorted. I don't understand why this is happening.

[javat33489]

I also tried different types of meshes and changed the geometry: