1. Discretization

1.1. Degrees of freedom

Modeling

Degree of freedom at all nodes

Degree of freedom only at vertex nodes

3D

DX, DY, DZ

PRES (*), GONF

• no kinematic conditions can be imposed on degree of freedom PRES.

1.2. Support mesh for stiffness matrices

For 3D modeling, finite element support meshes can be tetrahedra, hexahedra or prisms.

Modeling

Mesh

Interpolation in displacement

Interpolation in pressure and inflation

3D	TETRA10	Quadratic	Linear
	HEXA20	Quadratic	Linear
	PENTA15	Quadratic	Linear

1.3. Surface load support mesh

Modeling

Mesh

Interpolation on the go

3D	TRIA6	Quadratic
	QUAD8	Quadratic