3 \page double_nodes_page Duplicate Nodes or/and Elements
5 \n This operation allows duplicating mesh nodes or/and elements, which can be useful to emulate a crack in the model.
7 Duplication consists in creation of mesh element "equal" to existing ones.
9 <em>To duplicate nodes or/and elements:</em>
11 <li>From the \b Modification menu choose \b Transformation -> <b> Duplicate
12 Nodes or/and Elements </b> item or click <em>"Duplicate Nodes or/and
13 Elements"</em> button in the toolbar.
15 \image html duplicate_nodes.png "Duplicate Nodes or/and Elements button"
17 <li>Check in the dialog box one of three radio buttons corresponding to
18 the type of duplication operation you would like to perform.</li>
19 <li>Fill the other fields available in the dialog box (depending on
20 the chosen operation mode).</li>
21 <li>Click the \b Apply or <b>Apply and Close</b> button to perform the
22 operation of duplication.</li>
25 \n "Duplicate Nodes or/and Elements" dialog has three working modes:
27 <li>\ref mode_without_elem_anchor "Duplicate nodes only"</li>
28 <li>\ref mode_with_elem_anchor "Duplicate nodes and border elements"</li>
29 <li>\ref mode_elem_only_anchor "Duplicate elements only"</li>
33 \anchor mode_without_elem_anchor
35 <h2>Duplicate nodes only</h2>
37 \image html duplicate01.png
39 Parameters to be defined in this mode:
41 <li><b>Group of nodes to duplicate</b> (<em>mandatory</em>): these
42 nodes will be duplicated.</li>
43 <li><b>Group of elements to replace nodes with new ones</b>
44 (<em>optional</em>): the new nodes will replace the duplicated nodes within these elements.</li>
45 <li><b>Construct group with newly created nodes</b> option
46 (<em>checked by default</em>): if checked - the group with newly
47 created nodes will be built.</li>
49 A schema below illustrates how the crack is emulated using the node duplication.
50 \image html crack_emulation_double_nodes.png "Crack emulation"
51 This schema shows a virtual crack in a 2D mesh created using this duplication
53 - Black balls are <b>duplicated nodes</b>.
54 - Red balls are <b>new nodes</b>.
55 - <b>Elements to replace nodes with new ones</b> are marked with green.
57 Note that in the reality <b>duplicated nodes</b> coincide with <b>new nodes</b>.
60 \anchor mode_with_elem_anchor
63 <h2>Duplicate nodes and border elements</h2>
65 \image html duplicate02.png
67 Parameters to be defined in this mode:
69 <li><b>Group of elements to duplicate</b> (<em>mandatory</em>): these
70 elements will be duplicated.</li>
71 <li><b>Group of nodes not to duplicate</b> (<em>optional</em>):
72 group of nodes at crack bottom which will not be duplicated.</li>
73 <li><b>Group of elements to replace nodes with new ones</b>
74 (<em>mandatory</em>): the new nodes will replace the nodes to
75 duplicate within these elements.</li>
76 <li><b>Construct group with newly created elements</b> option
77 (<em>checked by default</em>): if checked - the group of newly created
78 elements will be built.</li>
79 <li><b>Construct group with newly created nodes</b> option
80 (<em>checked by default</em>): if checked - the group of newly
81 created nodes will be built.</li>
84 A schema below explains the crack emulation using the node duplication
86 \image html crack_emulation_double_nodes_with_elems.png "Crack emulation"
87 This schema shows a virtual crack in a 2D mesh created using this duplication
89 - Black segments are <b>duplicated elements</b> (edges in 2D case).
90 - Black balls (except for the lowest one) are duplicated nodes of <b>duplicated elements</b>.
91 - The lowest black ball is the <b>non-duplicated node</b>.
92 - Red balls are <b>newly created nodes</b>.
93 - Red segments are <b>created elements</b> (edges).
94 - <b>Elements to replace nodes with new ones</b> are marked with green.
96 Note that in the reality <b>nodes to duplicate</b> coincide with <b>new nodes</b>.
98 In a 3D case, where <b>elements to duplicate</b> are faces, the edges
99 located at the "crack" (if any) are cloned automatically.
102 \anchor mode_elem_only_anchor
103 <h2>Duplicate elements only</h2>
105 This mode duplicates the given elements, i.e. creates new elements with the same nodes as the given elements.
110 \image html duplicate03.png
113 <li><b>Group of elements to duplicate</b> (<em>mandatory</em>): these
114 elements will be duplicated.</li>
115 <li><b>Construct group with newly created elements</b> option
116 (<em>checked by default</em>): if checked - the group of newly created
117 elements will be built. The name of the created group starts from
118 "DoubleElements".</li>
121 <br><b>See Also</b> a sample TUI Script of a
122 \ref tui_duplicate_nodes "Duplicate nodes or/and elements" operation.