b2000mNumerical integration scheme: Position and numbering of integration points. Tetrahedral (TE) Elements . TE elements define tetrahedral elements in R 3.B2000++ node identifiers (n_i)Numerical integration scheme: Position and numbering of integration points. Tetrahedral (TE) Elements . TE elements define tetrahedral elements in R 3.B2000++ node identifiers (n_i)