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159 lines
6.1 KiB
Plaintext
159 lines
6.1 KiB
Plaintext
/*!
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\page double_nodes_page Duplicate Nodes or/and Elements
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\n This operation allows duplicating mesh nodes or/and elements, which can be useful to emulate a crack in the model.
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Duplication consists in creation of mesh elements "equal" to existing ones.
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<em>To duplicate nodes or/and elements:</em>
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<ol>
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<li>From the \b Modification menu choose \b Transformation -> <b> Duplicate
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Nodes or/and Elements </b> item or click <em>"Duplicate Nodes or/and
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Elements"</em> button in the toolbar.
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<br>
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\image html duplicate_nodes.png "Duplicate Nodes or/and Elements button"
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</li>
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<li>Check in the dialog box one of four radio buttons corresponding to
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the type of duplication operation you would like to perform.</li>
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<li>Fill the other fields available in the dialog box (depending on
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the chosen operation mode).</li>
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<li>Click the \b Apply or <b>Apply and Close</b> button to perform the
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operation of duplication.</li>
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</ol>
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\n "Duplicate Nodes or/and Elements" dialog has four working modes:
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<ul>
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<li>\ref mode_without_elem_anchor "Duplicate nodes only"</li>
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<li>\ref mode_with_elem_anchor "Duplicate nodes and border elements"</li>
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<li>\ref mode_elem_only_anchor "Duplicate elements only"</li>
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<li>\ref mode_group_boundary_anchor "Duplicate nodes on group boundaries"</li>
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</ul>
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<br>
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\anchor mode_without_elem_anchor
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<h2>Duplicate nodes only</h2>
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\image html duplicate01.png
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Parameters to be defined in this mode:
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<ul>
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<li><b>Group of nodes to duplicate</b> (<em>mandatory</em>): these
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nodes will be duplicated.</li>
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<li><b>Group of elements to replace nodes with new ones</b>
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(<em>optional</em>): the new nodes will replace the duplicated nodes within these elements.</li>
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<li><b>Construct group with newly created nodes</b> option
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(<em>checked by default</em>): if checked - the group with newly
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created nodes will be built.</li>
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</ul>
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A schema below illustrates how the crack is emulated using the node duplication.
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\image html crack_emulation_double_nodes.png "Crack emulation"
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This schema shows a virtual crack in a 2D mesh created using this duplication
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mode:
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- Black balls are <b>duplicated nodes</b>.
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- Red balls are <b>new nodes</b>.
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- <b>Elements to replace nodes with new ones</b> are marked with green.
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Note that in the reality <b>duplicated nodes</b> coincide with <b>new nodes</b>.
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<br>
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\anchor mode_with_elem_anchor
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<h2>Duplicate nodes and border elements</h2>
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\image html duplicate02.png
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Parameters to be defined in this mode:
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<ul>
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<li><b>Group of elements to duplicate</b> (<em>mandatory</em>): these
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elements will be duplicated.</li>
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<li><b>Group of nodes not to duplicate</b> (<em>optional</em>):
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group of nodes at crack bottom which will not be duplicated.</li>
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<li><b>Group of elements to replace nodes with new ones</b>
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(<em>mandatory</em>): the new nodes will replace the nodes to
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duplicate within these elements.</li>
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<li><b>Construct group with newly created elements</b> option
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(<em>checked by default</em>): if checked - the group of newly created
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elements will be built.</li>
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<li><b>Construct group with newly created nodes</b> option
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(<em>checked by default</em>): if checked - the group of newly
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created nodes will be built.</li>
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</ul>
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A schema below explains the crack emulation using the node duplication
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with border elements.
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\image html crack_emulation_double_nodes_with_elems.png "Crack emulation"
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This schema shows a virtual crack in a 2D mesh created using this duplication
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mode. In this schema:
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- Black segments are <b>duplicated elements</b> (edges in 2D case).
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- Black balls (except for the lowest one) are duplicated nodes of <b>duplicated elements</b>.
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- The lowest black ball is the <b>non-duplicated node</b>.
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- Red balls are <b>newly created nodes</b>.
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- Red segments are <b>created elements</b> (edges).
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- <b>Elements to replace nodes with new ones</b> are marked with green.
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Note that in the reality <b>nodes to duplicate</b> coincide with <b>new nodes</b>.
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<br>
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In a 3D case, where <b>elements to duplicate</b> are faces, the edges
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located at the "crack" (if any) are cloned automatically.
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<br>
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\anchor mode_elem_only_anchor
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<h2>Duplicate elements only</h2>
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This mode duplicates the given elements, i.e. creates new elements with the same nodes as the given elements.
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<br>
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\image html duplicate03.png
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Parameters to be defined in this mode:
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<ul>
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<li><b>Group of elements to duplicate</b> (<em>mandatory</em>): these
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elements will be duplicated.</li>
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<li><b>Construct group with newly created elements</b> option
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(<em>checked by default</em>): if checked - the group of newly created
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elements will be built. The name of the created group starts from
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"DoubleElements".</li>
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</ul>
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<br>
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\anchor mode_group_boundary_anchor
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<h2>Duplicate nodes on group boundaries</h2>
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This mode duplicates nodes located on boundaries between given groups of volumes.
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<br>
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\image html duplicate04.png
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Parameters to be defined in this mode:
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<ul>
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<li><b>Groups of volumes</b> (<em>mandatory</em>): list of volume
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groups. These groups should be disjoint, i.e. should not have shared
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volumes.</li>
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<li> If <b>Create joint elements</b> option is activated, flat
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elements are created on the duplicated nodes: a triangular facet
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shared by two volumes of two groups generates a flat prism, a
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quadrangular facet generates a flat hexahedron.
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<br>
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The created flat volumes are stored in groups. These groups are named
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according to the position of the group in the list of groups: group
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"j_n_p" is a group of flat elements that are built between the group \#n
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and the group \#p in the group list. All the flat elements are gathered
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into the group named "joints3D". The flat element of the multiple
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junctions between the simple junction are stored in a group named
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"jointsMultiples".</li>
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<li> If <b>On all boundaries</b> option is activated, the volumes,
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which are not included into <b>Groups of volumes</b>, are considered
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as another group and thus the nodes on the boundary
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between <b>Groups of volumes</b> and the remaining mesh are also
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duplicated.</li>
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</ul>
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<br><b>See Also</b> a sample TUI Script of a
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\ref tui_duplicate_nodes "Duplicate nodes or/and elements" operation.
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*/
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