3 \page double_nodes_page Duplicate Nodes or/and Elements
5 \n This operation allows to duplicate nodes or/and elements of your mesh.
6 Duplication of nodes 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
34 <h2>Duplicate nodes only</h2>
36 In this mode the dialog looks like:
38 \image html duplicate01.png
40 Parameters to be defined in this mode:
42 <li><b>Group of nodes to duplicate</b> (<em>mandatory</em>): these
43 nodes will be duplicated.</li>
44 <li><b>Group of elements to replace nodes with new ones</b>
45 (<em>optional</em>): the new nodes will replace the nodes to
46 duplicate within these elements.</li>
47 <li><b>Construct group with newly created nodes</b> option
48 (<em>checked by default</em>): if checked - the group with just
49 created nodes will be built.</li>
51 A schema below explains the crack emulation using the node duplication.
52 \image html crack_emulation_double_nodes.png "Crack emulation"
53 This schema shows a virtual crack in a 2D mesh created using this duplication
55 - Black balls are <b>nodes to duplicate</b>.
56 - Red balls are <b>new nodes</b>.
57 - <b>Elements to replace nodes with new ones</b> are marked with green.
59 Note that in reality <b>nodes to duplicate</b> coincide with <b>new nodes</b>.
63 \anchor mode_with_elem_anchor
64 <h2>Duplicate nodes and border elements</h2>
66 In this mode the dialog looks like:
68 \image html duplicate02.png
70 Parameters to be defined in this mode:
72 <li><b>Group of elements to duplicate</b> (<em>mandatory</em>): these
73 elements will be duplicated.</li>
74 <li><b>Group of nodes not to duplicate</b> (<em>optional</em>):
75 group of nodes at crack bottom which will not be duplicated.</li>
76 <li><b>Group of elements to replace nodes with new ones</b>
77 (<em>mandatory</em>): the new nodes will replace the nodes to
78 duplicate within these elements.</li>
79 <li><b>Construct group with newly created elements</b> option
80 (<em>checked by default</em>): if checked - the group of just created
81 elements will be built.</li>
82 <li><b>Construct group with newly created nodes</b> option
83 (<em>checked by default</em>): if checked - the group of just
84 created nodes will be built.</li>
87 A schema below explains the crack emulation using the node duplication
89 \image html crack_emulation_double_nodes_with_elems.png "Crack emulation"
90 This schema shows a virtual crack in a 2D mesh created using this duplication
92 - Black segments are <b>elements to duplicate</b> (edges in 2D case).
93 - Black balls (except the lowest one) are nodes of <b>elements to
94 duplicate</b> that are duplicated.
95 - The lowest black ball is a <b>node not to duplicate</b>.
96 - Red balls are <b>creates nodes</b>.
97 - Red segments are <b>created elements</b> (edges).
98 - <b>Elements to replace nodes with new ones</b> are marked with green.
100 Note that in reality <b>nodes to duplicate</b> coincide with <b>new nodes</b>.
102 In a 3D case, where <b>elements to duplicate</b> are faces, the edges
103 located at the "crack" (if any) are cloned automatically.
106 \anchor mode_elem_only_anchor
107 <h2>Duplicate elements only</h2>
109 This mode just duplicates given elements, i.e. creates new elements on
110 the same nodes as the given elements.
112 In this mode the dialog looks like:
114 \image html duplicate03.png
116 Parameters to be defined in this mode:
118 <li><b>Group of elements to duplicate</b> (<em>mandatory</em>): these
119 elements will be duplicated.</li>
120 <li><b>Construct group with newly created elements</b> option
121 (<em>checked by default</em>): if checked - the group of just created
122 elements will be built. A name of the created group starts from
123 "DoubleElements".</li>
127 <br><b>See Also</b> a sample TUI Script of a
128 \ref tui_duplicate_nodes "Duplicate nodes or/and elements" operation.