Remesh Area
Remesh Area
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The function was completely rewritten for version 13 of PRIMER . To start the process PRIMER needs some shells to remesh. Use the and buttons to add or remove shells to remesh. Both of these will map an object menu which will allow you to choose which shells to remesh. Use the button in the object menu to add or remove them. |
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Once there are some shells to remesh the button will become active. The target size for new shells is given with the textbox. You can either type in the necessary size in the textbox or pressing will use the average size of the selected shells as the target size. Shells can be added or removed as much as you like. Note that the shells do not have to form a single attached area. There can be several different areas of shells. When you are happy with the selection pressing will take you to the next step. |
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To illustrate some of the remeshing features we will show an example of remeshing the top part of a component with a finer mesh. The mesh on the right has an average size of about 10mm. We want to remesh it with a size of 6mm.
To start the meshing process PRIMER looks at the selected shells to find any free edges and edges which are shared by other elements. The selected shells are sketched (shown in black in the image on the right). Edges that are shared with other elements are shown in red and a red blob is drawn for each node that PRIMER must keep to maintain the mesh connectictivity.
Free edges are shown in blue.
PRIMER
will look along the free edges and anwhere where two adjacent free edges have an angle greater than
a fixed node will also be added to ensure that any sharp edge edges are maintained. In the image on the right these are shown as blue blobs.
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The tells PRIMER to look for any feature lines in the selected shells that have an angle greater than feature line limit. If it is turned on by ticking the checkbox then PRIMER will show the feature lines in green. Where feature lines intersect PRIMER will also add fixed points (shown as green blobs). The image on the right shows the feature lines found with an angle of 20 degrees. |
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If a new value is given for then PRIMER will recalculate and redraw as required.  |
By default
PRIMER
will only preserve the edges of the mesh. There may be feature lines on the mesh where you want to ensure that nodes are created.
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The
tool has
,
and
options. In the image above the
tool is active.
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The
tool has
and
options.
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It is also possible to add extra fixed points and free edges to the mesh that should be preserved. To do this use the
To add a fixed point left click with the mouse where you want the fixed point to be created.
To remove a fixed point right click with the mouse on the fixed point you want to remove. Only manually added fixed points (shown in cyan) and fixed points added by
PRIMER
on free edges (shown in blue) can be removed.
In the image above there is a fixed point in the middle of the component and there are two fixed points. PRIMER will ensure that nodes are created where there are fixed points.
To add a feature line left click with the mouse on an element edge where you want the feature line to be created.
To remove a feature line right click with the mouse on the feature line you want to remove. Only manually added feature lines (shown in cyan) can be removed.
allows you to lock a mesh on a free edge/feature line. This will ensure that the original nodes are maintained. This may be useful to keep nodes on hole boundaries that are used in nodal rigid bodies or connections. A locked edge will be drawn in red with red blobs for the fixed nodes.
In the image above there are feature lines on 2 element edges. PRIMER will ensure that nodes are created along feature lines.
Once you have created any and that you need in the mesh and set the Element size to the target mesh size (6mm in this example) press and PRIMER will move onto the next stage. PRIMER will look at the free edges and feature lines that you have selected and choose how many nodes to create on them to achieve the target mesh size. A magenta + symbol will be shown where each node will be created and then number of elements that will be created between fixed points on a free edge is shown as a magenta number.
To increase the number of elements created along a free edge left click with the mouse on the number.
If you want to go back and add some more fixed points and/or feature lines press
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The preview of the mesh is shown in blue.
If you are happy with the mesh press
to finalise the mesh.
It can be difficult to see the new mesh so the button can be used to toggle between both meshes, the original mesh and the new mesh. |
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It can be difficult to see the new mesh so the
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Original mesh shown after pressing button once
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New mesh shown after pressing button again.
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| When Preserve elements around hole option is turned ON, PRIMER will preserve all the elements while remeshing which are present immediately around hole. By specifying 'Max hole size' user can control which hole elements should be preserved. Edges of all such elements will be drawn in cyan colour to represent that those edges will be preserved. Free edges will still be drawn in blue. |
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Remesh muliple area
PRIMER allows you to select multiple zones to re-mesh using at the same time instead of selecting one by one.
Use to select multiple zones either using screen pick or directly from the object menu.
Use to remove shell from the selected zones. Once you are happy with the selection, hit Apply and continue with Remesh process as explained in the previous section.
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In version 17 onwards, the visibility of elements is maintained after area remesh.
also recognizes internal part boundaries.
If the selected shells have internal boundaries (belong to different *PARTs) they are treated in the same way as feature lines and shown in CYAN colour after the selection.
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