Solids and Assemblies: Element mesh

The parts of active study are meshed with 4 or 10 node tetrahedron elements. The density of element mesh have a great impact on results accuracy. In the area of more dense element mesh the results are more accurate. The drawback of dense element mesh is the increase in calculation time.

The impact on results accuracy is illustrated in the figures below.

Modify element mesh

Select
Edit from ribbon tab.
Modify element mesh with following functions:

Hide part

Parts can be hidden by hovering a mouse cursor over a part and pressing H.

Leave mesh visible

The element mesh can be left visible by turning on Leave polygon mesh visible setting. The element mesh is left visible when returning from FEA Mesh settings dialog.
The element mesh can be removed by pressing
Clear from the ribbon tab.

Mesh settings - parameter descriptions

The influence of mesh settings is directed to all parts of active study.

Parameter	Range	Default value	Description
Type of tetrahedron element	4 node, 10 node	10 node	Defines the used element type. With equal element meshes, 4 node tetrahedron Results are less accurate Calculation needs less memory and it is faster to perform. 10 node tetrahedron Results are more accurate Calculation needs more memory and it is slower to perform.
Relative target edge length [%]	0-100	Surface: 20, Interior: 40	Defines the target relationship between individual element and geometry edge length. The target length is not always reached because of limitations caused by other mesh parameters.
Maximum growth rate	>1.0	Surface: 1.5, Interior: 2	Defines the maximum allowable growth rate between adjacent element edge lengths.
Maximum spanning angle for curved surfaces [°]	0-60	30	Defines the maximum allowable difference between the angles of adjacent element face normals in curved surfaces. With lower values the curved surfaces will have more dense element mesh. With large models (dimensions bigger than a meter) which have curved faces, decreasing this value often helps to improve the meshing result.
Minimum edge length [mm]	>0	0.5	Defines the minimum allowable length for element edge. This parameter is used to limit the element mesh density in small details like around small holes and near sharp corners. The minimum edge length is usually 1 or 2 orders of magnitude smaller than the absolute value of target edge length.

Refine mesh

The element mesh can be refined locally around given point, edge or surface by pressing Target. Select point, edge or surface from 3d model and give target edge length for elements in millimeters.
- Refinement around point
- Refinement around edge
- Refinement around surface