FILLET MESH

 

The FILLET MESH function is used to generate fillet elements at the sharp corners of a part.  This function requires a relatively clean mesh without overlap elements or interior gaps, in additional to consistent element normals.  The FILLET MESH dialog box as illustrated in Figure 6.1.16, provides options to locate and fillet sharp corners. 

Figure 6.1.16 Element Fillet dialog box

 

The following steps are required to generate the fillet mesh:

 

          FEATURE ANGLE 

1. Enter the angle criteria (the default is 45º).

2. Click the FIND FEATURE LINES button to seek the feature lines where the angle is larger than or equal to the angle criteria. The program will highlight all features lines that meet the criteria.

 

          FILLET ELEMENT

1.        Key in input field of FILLET RADIUS to define fillet radius for all feature edges.

2.        MERGE TOLERANCE function is used to define the gap tolerance between nodes on the fillet radius. Nodes that are near by each other will be merged if the distance is less than the defined tolerance.

3.        If SELECT FEATURE LINE option is selected, eta/DYNAFORM will display the SELECT NODE dialog box for the user to select two or three nodes on the feature line.  If two nodes are selected on a two-face feature line, eta/DYNAFORM will display a dialog box as shown in Figure 6.1.19. If three nodes on a three-face feature line are selected, eta/DYNAFORM will display a dialog box as illustrated in Figure 6.1.20a.

Figure 6.1.17 Find Feature Lines

ALL FEATURE LINES

When ALL FEATURE LINES function is selected, all feature lines will be filleted with the global radius.  Press OK button on the PARAMETERS dialog box to generate the fillet mesh.  The FILLET function supports different radii and automatically smooth the elements.

Figure 6.1.18 Fillet with All Feature Lines

 

         

Figure 6.1.19a Element Fillet          Figure 6.1.19b Select feature line

 

 

Figure 6.1.19c Element Fillet Result

 

          

Figure 6.1.20a Element Fillet               Figure 6.1.20b Select Feature Line

 

Figure 6.1 20c Element Fillet Result