**radial#

Description#

This boundary condition allows imposing radial displacements which simulate the expansion or contraction around a group of nodes. An example is the shrinking or expanding of tubes.

Syntax#

**radial \(~\,~\,\) nset_name origin direction value [table]

nset_name

Character name of the nset where the condition is applied.

origin

Vector form for the origin where the expansion axis passes. A vector form will give the two or three coordinates necessary in parenthesis. An example is (1. 0. 1.).

direction

Direction of the axis of expansion. These directions must coincide with the problem coordinate axis, and are defined with the tokens d1, d2, and d3.

value

Real number giving the base value for the conditions magnitude. A positive value results in expansion and negative contraction.

table

Name of a table describing the load magnitude through time (see ***table).

Note

This boundary condition can also be applied using a cylindrical local frame.

Example#

**radial
   inner (0.0 0.0 0.0) d3 8. time
../../_images/radial.svg

In 2D the expansion axis is necessarily d3.