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Fredrik Lagerström 25.1 1 {{box cssClass="floatinginfobox" title="**Contents**"}}
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Fredrik Lagerström 40.1 6 (% border="1" class="table-hover" style="width:573px" %)
7 |(% style="background-color:#0076cb; width:231px" %)(% style="color:#ffffff" %)Line-line connection property|(% style="background-color:#0076cb; width:339px" %)(% style="color:#ffffff" %)Description
8 |(% style="width:231px" %)Icon|(% style="width:339px" %)[[image:1585065089819-738.png]]
9 |(% style="width:231px" %)Modules where available|(% style="width:339px" %)[[image:1585065103072-356.png]] [[image:1585065119746-730.png]] [[image:1585065144408-275.png]] [[image:1585065151853-420.png]] [[image:1585065175612-389.png]]
10 |(% style="width:231px" %)Motion component|(% style="width:339px" %)Parallel with Global Z axis in [[image:1585065112268-622.png]]
11 |(% style="width:231px" %) |(% style="width:339px" %)Arbitrary direction in Global XY plane in [[image:1585065123746-919.png]] [[image:1585065140139-923.png]]
12 |(% style="width:231px" %) |(% style="width:339px" %)Arbitrary direction in [[image:1585065157200-333.png]] [[image:1585065172661-174.png]]
13 |(% style="width:231px" %)Rotation component|(% style="width:339px" %)Arbitrary direction in Global XY plane in
14 |(% style="width:231px" %) |(% style="width:339px" %)Not available in [[image:1585065130431-907.png]] [[image:1585065137329-755.png]]
15 |(% style="width:231px" %) |(% style="width:339px" %)Arbitrary direction in [[image:1585065161791-903.png]] [[image:1585065169030-739.png]]
16 |(% style="width:231px" %)Geometry|(% style="width:339px" %)Straight or curved reference lines
17 |(% style="width:231px" %)Available analysis results|(% style="width:339px" %)**Connection forces and moments**
18 |(% style="width:231px" %)Default Short Command|(% style="width:339px" %)CLN
Fredrik Lagerström 25.1 19
20 With the //Line-line connection// command, different connections can be defined between two regions having different positions in 3D (so not having common parts in the geometry model). Some typical examples:
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22 * **Hinged connection between regions having a gap**
23 [[image:1585065202130-438.png]]
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25 * **Slabs on different level**
26 Instead of connecting two slabs with a //Wall// element, the connection can be modeled with the //Line-line connection// tool (if the internal stress and other results are not required in the wall).
27 \\[[image:1585065224652-858.png]]
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29 **Definition steps**
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Fredrik Lagerström 37.1 31 1. Start [[image:1585065244596-558.png]] //Line-line connection// command from [[image:1585065249950-914.png]] [[tabmenu>>path:/xwiki/wiki/femdesignwiki/get/Manuals/User%20Manual/Structure%20definition/Borehole%20(Geometry)/?sheet=CKEditor.ResourceDispatcher&outputSyntax=plain&language=en&type=doc&reference=Manuals.User+Manual.Basic+concept.WebHome&typed=true&parameters%5Banchor%5D=HTabmenus]] and choose [[image:1585065258437-969.png]] //Define//.
Fredrik Lagerström 36.1 32 [[image:1585065277788-906.png]]
Fredrik Lagerström 38.1 33
Fredrik Lagerström 41.1 34 1. Set the properties of the new connection at [[image:1585065288893-380.png]] //Default settings//. See the settings possibilities and options at **Properties (Non-Linear Behaviors)**.[[image:1585065296452-924.png]](((
Fredrik Lagerström 36.1 35 |(% style="width:110px" %)[[image:warning.png]]|(% style="width:1340px" %)(((
36 Applying a connection different from rigid state, the //Interface position// (//r//) is very important.
Fredrik Lagerström 25.1 37
Fredrik Lagerström 36.1 38 [[image:1585065346191-699.png]]
Fredrik Lagerström 25.1 39
Fredrik Lagerström 36.1 40 //r = distance between connection position and start point of definition /// //distance between start and end points of connection//
41 )))
Fredrik Lagerström 25.1 42
Fredrik Lagerström 36.1 43 |(% style="width:68px" %)[[image:1585065373630-226.png]]|(% style="width:1382px" %)(((
44 The figure shows two different interface positions at hinged line-line connection between two plate regions: in the first example, the hinged line (the place of the interface) is on the edge of the left plate (//r,,s,,=r,,e,,=0//), and in the second example the interface position is in the middle (//r,,s,,=r,,e,,=0.5//). In both examples, the left plate is supported rigidly and the right one has simple support against to //Z//-directional motion. The //M,,x,, //moment diagrams show zero moments where the interface positions are placed.
Fredrik Lagerström 25.1 45
Fredrik Lagerström 36.1 46 [[image:1585065392942-577.png]]
47 )))
Fredrik Lagerström 25.1 48
49 In the settings dialog of a curved line support, the support direction has to set fixed or variable along the support’s reference line.
Fredrik Lagerström 36.1 50 \\[[image:1585065437765-598.png]]
51 )))
Fredrik Lagerström 25.1 52 1. Set the system for the **direction** of the connection components.
53 1. Choose a **geometry** definition method for the first connection object’s reference line (axis).
54 1. Select the first object you would like to connect.
55 1. Define the first connection line object in the model view based on the chosen geometry method.
56 1. Choose a **geometry** definition method for the second connection object’s reference line (axis).
57 1. Define the second connection line object in the model view based on the chosen geometry method.
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59 Optional steps:
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Fredrik Lagerström 36.1 61 (% start="9" %)
62 1. Modify the connection properties with the [[image:1585065466297-596.png]] //Properties// tool of the tool palette.
63 1. Add members to a selected connection or remove members from it with [[image:1585065472650-873.png]] **Edit connected objects**.
Fredrik Lagerström 41.1 64 1. Set the display settings of connections at //Settings > All > Display > Connections//. See the possibilities at [[**Point-point connection**>>doc:Manuals.User Manual.Structure definition.Point-point connection (Geometry).WebHome]].
Fredrik Lagerström 25.1 65 1. The connections are stored on “Modeling tools” **Object layers**. At layer settings, the default color defines the connection label color.
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