INNER FILL

 

The functions in the INNER FILL dialogue are used for filling interior holes and missing geometry on the outer boundary of the product geometry such as windows, wheel houses, tail light lamps, shipping holes, access holes, bolt holes, etc.  There are four functions in this menu as shown in Figure 6.1.21.

 

1.        CLOSED CURVE (or closed area)

2.        OPEN CURVE (or open area)

3.        POLYGON

4.        AUTO FILL

 

Figure 6.1.21 Inner Fill Options

  

CLOSED CURVE

This function fills an inner hole or closed area in a part. The program highlights the inner boundary as shown in Figure 6.1.22.

Figure 6.1.22 Boundary Lines of Inner Holes

 

At the same time, DYNAFORM displays a dialog window as shown in Figure 6.1.23 to prompt the user to select a node on an inner boundary to fill. After selecting a node on the boundary, the interior hole will be filled automatically with elements as shown in Figure 6.1.24.

 

Figure 6.1.23 Select Node on Inner Boundary               Figure 6.1.24 Filled Mesh within a Closed Curve

 

 

OPEN CURVE

 

This function allows the user to fill an open or cut-out area. Figure 6.1.25 shows the mesh result using a spline curve to close the opening.

 

Figure 6.1.25 Filled Mesh with Open Curve

Figure 6.1.26 Open Curve Options

1.        Select the OPEN CURVE option, and the program will prompt the user to select elements near the expected fill area.

2.        Select OK to accept the selected elements and a window will be displayed as shown in Figure 6.1.26 to prompt the user to select one of the following methods to fill the area.

SELECT NODES


This option allows the user to select a set of nodes to define the outer boundary of the open curve.

SELECT LINE


This option allows the user to select an existing line to define the outer boundary of the open curve.  After a line is selected, the program displays the SELECT NODES window and prompts the user:

             SELECT TWO NODES TO SPLIT THE LINE, OR PICK OK TO USE THE ENTIRE LINE
After selecting two nodes, the line segment between the selected nodes will be used as the boundary to close the open curve.

   
CREATE LINE


This option allows the user to create a line as the outer boundary to close the open curve for filling.  After a line is created, the SELECT NODES window will be displayed:

             SELECT TWO NODES TO SPLIT THE LINE, OR PICK OK TO USE THE ENTIRE LINE
After selecting two nodes, the line segment between the selected nodes will be used to close the open curve.

 


CREATE SPLINE


Allows the user to create a spline curve as the outer boundary for fill mesh.  After the spline is created, the program will display the SELECT NODES window and prompt the user with the following message:

             SELECT TWO NODES TO SPLIT THE LINE, OR PICK OK TO USE THE ENTIRE LINE
After selecting two nodes, the spline segment between the two points will be used.

 

3.        After the curve is defined by any of the above methods to close the region, the program will fill in a set of elements within the region.

 

 

POLYGON

   

This function allows the user to select a set of nodes as the boundary edge to create a mesh to fill the boundary.  Once this function is selected, the program will display the SELECT NODE window and prompt the user with the following message:

                   SELECT A SET OF NODES CONSECUTIVELY AS BOUNDARY EDGE

 

After a set of nodes is selected, a set of elements is created to fill the inner boundary.

 

AUTO FILL

 

Once selected, this function automatically finds and fills all inner holes in the part with elements.

 

eta/DYNAFORM will create elements as well as surfaces in all filled areas.  The user may choose whether or not to display the surfaces.  This option is controlled in the DYNAFORM configuration file: DYNAFORMDEFAULT, located in the program installation directory.

 

Note:     Click UNDO on the OPTION window as in Figure 6.1.21. The filled mesh and surface will be removed.