EXPAND
The Expand function will add one or two rows of elements to the part boundary to round off the outer edge with formable radii of approximately 3mm. When this function is selected, a dialog window as shown in Figure 6.1.40 will be displayed. The value in the extension field is the default extension value for the current part. The user can enter a desired extension value.
Figure 6.1.40 Boundary Expand
Click the BOUNDARY EXPAND button, and the extension boundary is highlighted as shown in the left picture of Figure 6.1.41. The default extension value is calculated from the average element size. The user can enter another extension value and click BOUNDARY EXPAND again.
Figure 6.1.41 An Example of Boundary Expand
Select the MORPH BOUNDARY button to morph the boundary line. Refer to the description of the MORPHING LINE function in Section 6.4.1.
The FLATTEN BOUNDARY SEGMENT function allows user to select two points on the boundary line to flatten the line segment between the selected points.
When the morphed boundary is accepted, select FILL BOUNDARY to generate the mesh between the original boundary and the extension boundary. See the right picture in Figure 6.1.37 for the filled mesh.
SMOOTH CORNER allows the user to select a sharp corner node to smooth out the corner.
Note: The sharp angle is determined by two adjacent boundary elements when the angle between two boundary edges is greater than 30 degrees.
Click UNDO to remove the filling mesh and exit the function.