Degrees of Freedom (DOF)#

Description#

The degree of freedom (DOFs) types in Z-set each have a particular name used for their identification in various parts of the code. These applications may be in specifying the boundary conditions (**impose_nodal_dof takes a DOF name for example), specifying output curves, or use within the post-processor.

The commonly used DOFs in the code are summarized below. Some finite elements have additional DOFs for nonlocal models, micromorphic models, hydrogen diffusion, etc.

DOFs

Description

U1

displacement along the axis 1

U2

displacement along the axis 2

U3

displacement along the axis 3

R1

Rotation about the axis 1

R2

Rotation about the axis 2

R3

Rotation about the axis 3

W1

Micro-polar rotation about the axis 1

W2

Micro-polar rotation about the axis 2

W3

Micro-polar rotation about the axis 3

PR

Pressure

TP

Temperature

etc.