Structural Dynamics Toolbox

Element Functions

Element functions supported by OpenFEM version 1.0 are listed below. These elements currently only support elastic behaviour (both isotropic and anisotropic).

3-D elements can be degenerated to 2-D by DOF elimination. 2-D elements are assumed in the x-y plane. Plane stress, plane strain or axysimmetry is selected using the element property row in il.

Non standard and utility elements
celas	scalar springs and penalized rigid links
fe_super	element function for general superelement support
rigid	rigid constraint handling

3-D Element Functions
bar1	standard 2-node traction-compression element
beam1	standard 2-node 12-DOF beam element
flui4	4,6 and 8 node fluids in pressure formulation
hexa8	8 node 24 DOF solid brick element (3Q1D)
hexa20	20 node 60 DOF solid brick element (3Q2C)
mass1	concentrated nodal mass element
mass2	concentrated nodal mass with offset
penta6	6 node, 18 DOF volume element (3R1D)
penta15	15 node, 45 DOF volume element (3R2C)
quad4	quadrilateral 4 node, 20-24 DOF thick/thin shell element
mitc4	quadrilateral 4 node shell (MITC4)
quadb	quadrilateral 8 node thick/thin plate element
tetra4	4 node isoparametric solid element (3P1D)
tetra10	10 node isoparametric solid element (3P2C)
tria3	triangular 3-node 18-DOF thin plate element (DKTP)
tria6	triangular 6-node 36-DOF thin plate element (plot only)

2-D Element Functions
q4p	4 node 8 DOF plane and axisymmetric quadrangle (2Q1D_CP, 2Q1D_DP and AQ1D)
q5p	5 node 10 DOF incompressible 2-D quadrangle (5NOE)
q8p	8-node 16 DOF plane and axisymmetric quadrangle (2Q2R_DP, 2Q2R_CP and AQ2R)
q9a	9-node 27 DOF axisymmetric quadrangle (AQ2C)
t3p	3-node 6 DOF plane and axisymmetric triangle (2P1D_DP, 2P1D_CP and AP1D)
t6p	6-node 12 DOF plane and axisymmetric triangle (2P2D_CP, 2P2D_DP and AP2D)