Subtracting one element from another

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

Hi, so right now, I have a model of a tooth with it's enamel cap and another model of just the cap. I'm thinking of meshing both of it, then by subtracting one from the other, I will end up with a perfect fit. 

 

I also have the file of the tooth without the cap, but there are discrepancies between the cap and the tooth w/o the cap that makes weird results for load analysis. I tried tetrameshing both then imprinting, but I cannot get it to work. It ends up showing either simply 'failed to imprint' or 'must use shell elements' or something like that. 

 

 

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited April 2015

    Do you like to make 'subtraction' over the mesh ? Do you have geometrical surfaces of your tooth?

    If you work directly with the mesh, maybe do with shell elements firstly, then fill with TET later.

    If you have surfaces, it's better image/emoticons/default_smile.png' alt=':)' srcset='/emoticons/smile@2x.png 2x' width='20' height='20'>

  • Rahul_P1
    Rahul_P1
    Altair Employee
    edited April 2015

    You can surface mesh one part > duplicate the mesh > project the duplicated elements to the next part > so now the surface meshes match > then proceed to tetramesh the volumes > make sure match existing mesh option is checked.