|Un||n must be a positive integer () that will define the element type uniquely.|
None required for linear user elements.
As needed in user subroutine UEL for general user elements. The maximum number of coordinates per node is specified in the user element definition (see Defining the maximum number of coordinates needed at any nodal point” in “User-defined elements, Section 26.15.1). The first coordinate entries at each node should correspond to the standard ABAQUS convention (X, Y, Z or r, z for axisymmetric elements).
For a linear user element the properties are the stiffness and mass, defined via user-defined matrices or read from an ABAQUS/Standard results file. If necessary, you can specify Rayleigh damping values for linear user elements in the element property definition.
For a general user element defined via user subroutine UEL, you define the number of element properties in the user element definition and provide the numerical values in the element property definition. The definition of these properties depends on your coding in subroutine UEL.
|Input File Usage:|
None for linear user elements.
Un: Distributed load or flux whose magnitude is given via distributed load or distributed flux loading definitions (see Distributed loads, Section 27.4.3, or Thermal loads, Section 27.4.4) for a general user element. n must be a positive integer that is passed into user subroutine UEL to identify the particular load type.
UnNU: Distributed load or flux that is completely defined as equivalent nodal values inside user subroutine UEL for a general user element. n must be a positive integer: will be passed into subroutine UEL when such a load is active to identify the load type. The minus sign on n indicates that the load is of type NU.
For a linear user element there are no stress or strain components since the element only appears as a stiffness and mass.
For a general user element any stress, strain, or other solution-dependent variables within the element must be defined as solution-dependent state variables by your coding within subroutine UEL. They can be output using output variable SDV.
Currently element output to the output database is not supported for user-defined elements.