Tetrahedral and pyramid in OS

[aarenas]

Hello everyone,

In order to create tetrahedral and pyramid elements, Can I use a cube as a base element and assign same coordinates to a set of nodes? Let me explain. Say a cube with bottom four nodes being 1,2,3 and 4; and top four nodes being 5,6,7 and 8. If I define the coordinates of nodes 5,6,7 and 8 to be exactly the same, the final shape is a pyramid. Should this work? Or Should I move the cube corners in order to have a distorted cube with pyramid shape?

If both approaches work, which one should provide better results?

Thanks in advance

[fmk]

yoy don't need additional nodes, you can use duplicate nodes. both will work, the former would in theory be more accurate.

[aarenas]

fmk wrote:
> yoy don't need additional nodes, you can use duplicate nodes. both will
> work, the former would in theory be more accurate.

Frank, thank you for your reply. I´ll try the first aproach and I will post the findings. Alfredo