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##

*USER ELEMENT

With this option the user can define a user element, i.e. an element created
by the user and not available by default in CalculiX. The following parameters
are required: TYPE, INTEGRATION POINTS, MAXDOF and NODES.

The TYPE must begin with the letter U and is to be followed by a strictly
positive integer not exceeding 9999. It is used in an
*ELEMENT card to assign this type to specific elements.

INTEGRATION POINTS defines the number of integration points used in the
numerical integration of this element type (maximum 256). It is used for allocation
purposes. E.g stresses and strains are usually calculated at the integration
points.

The parameter MAXDOF declares the maximum degree of freedom associated with
nodes belonging to this element type (maximum 256). Translational degrees of freedom
correspond to degrees of freedom 1,2 and 3 rotational degrees of freedom to
4,5 and 6. For instance, shell are beam elements
usually contain rotational degrees of freedom, so
MAXDOF=6. For volumetric elements MAXDOF is usually 3.

Finally, the parameter NODES specifies the number of nodes associated with
this element type (maximum 256).

First line:

- *USER MATERIAL
- Enter the parameters and their value

Example:
*USER ELEMENT,TYPE=U1,INTEGRATION POINTS=0,MAXDOF=6,NODES=2

defines a user element of type U1 with no integration points (i.e. analytical
integration), a maximum degree of freedom of 6 and 2 nodes.

** Next:** *USER MATERIAL
** Up:** Input deck format
** Previous:** *UNCOUPLED TEMPERATURE-DISPLACEMENT
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guido dhondt
2018-12-15