Design of a 3d finite element mesh of a 3d part that comprises a lattice structure

A system comprising:

• a processor coupled to a memory and a graphical user interface,
• wherein the memory has recorded thereon a computer program for designing a three-dimensional (3D) finite element mesh of a 3D part that comprises a lattice structure that when executed by the processor causes the processor to be configured to:
• obtain a solid representation of the 3D part;
• obtain a regular tiling of cells, each cell comprising a finite element mesh;
• superpose the regular tiling of cells with the solid representation of the 3D part;
• partition the cells into two groups:
• a first group of cells, each in contact with the solid representation of the 3D part, and
• a second group of cells (S44), none in contact with the solid representation of the 3D part;
• finite element mesh a boundary of the solid representation of the 3D part;
• extract a boundary finite element mesh of the first group of cells;
• compute a Boolean union of:
• the finite element mesh of the boundary of the solid representation of the 3D part, and
• the extracted boundary finite element mesh of the first group of cells;
• finite element mesh a volume of the computed Boolean union;
• and
• merge the finite element meshes of meshed volume of the computed Boolean union and the cells of the second group of cells