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Controlling mesh refinement in a model
A LUSAS model is a graphical representation consisting of geometric features (points, lines, surfaces, volumes) and assigned attributes (materials, loading, supports, mesh). The features in LUSAS form a hierarchy, that is, Volumes are comprised of Surfaces, which in turn are made up of Lines or Combined Lines, which are defined by Points. This is explained in the help menu:
Help topics > Modeller user manual > An introduction to LUSAS Modeller
None of the features (points, lines, surfaces) are used in the numerical solution of your
model. It is the mesh assigned to the features that is used. Therefore, if you wish a surface feature to be included in your analysis as a thick plate, you
should assign a thick plate mesh attribute to your surface feature. If you wish a line feature to be included in your analysis as a beam, you
should assign a beam mesh attribute to your line feature. In this example, any surfaces which are not assigned a plate mesh and any lines which are not assigned a beam mesh will not appear in
the analysis results.
To change the mesh divisions within features,
you may edit mesh attributes listed in the TreeView and the mesh
assigned to the the model will be updated automatically. When meshing
surface and volume features you may also use null mesh
attributes.
More on meshing surface features
More on meshing volume features
More about why mesh refinement
is so important
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