Engineering Solutions

FE joints panel

FE joints panel

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FE joints panel

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Use the FE joints panel to create, review, or update joint elements. A joint element is a definition of a connection between two rigid bodies. Joint elements store a property and orientation information.

Joint elements are config 22 and are displayed with lines between the appropriate nodes and the letter J between nodes 1 and 3 of the element. The type of a joint element controls the number of nodes contained in the element. The type also controls the orientation information formats available. The type of an element CANNOT be changed or selected using the Element Types panel.

The types are as follows:

Type

Type Name

# nodes

Orientation

User Profile

1

Spherical joint

HM_Panels_bmp00164

2

none/systems/nodes

LS-DYNA, PAM CRASH 2G

2

Revolute joint

HM_Panels_bmp00165

4

none/systems

LS-DYNA

3

Cylindrical joint

HM_Panels_bmp00166

4

none/systems

LS-DYNA

4

Planar joint

HM_Panels_bmp00167

4

none/systems

LS-DYNA

5

Universal joint

HM_Panels_bmp00168

4

none/systems

LS-DYNA

6

Translational joint

HM_Panels_bmp00169

6

none/systems

LS-DYNA

7

Locking joint

HM_Panels_bmp00170

6

none/systems

LS-DYNA

8

Ball joint

2

none

OptiStruct

9

Fixed joint

2

none

OptiStruct

10

Revolute joint

2

node/vector/coordinates

OptiStruct

11

Translational1 joint

2

node/vector/coordinates

OptiStruct

12

Cylindercal 1 joint

2

node/vector/coordinates

OptiStruct

13

Universal joint

2

node/vector/coordinates

OptiStruct

14

Constant_velocity joint

2

node/vector/coordinates

OptiStruct

15

Planar joint

2

node/vector/coordinates

OptiStruct

16

Inline joint

2

node/vector/coordinates

OptiStruct

17

Perpendicular joint

2

node/vector/coordinates

OptiStruct

18

Parallel axes joint

2

node/vector/coordinates

OptiStruct

19

Inplane joint

2

node/vector/coordinates

OptiStruct

20

Orient joint

2

node/vector/coordinates

OptiStruct

21

Point_to_curve joint

2

node/vector/coordinates

OptiStruct

22

Curve_to_curve joint

2

node/vector/coordinates

OptiStruct

23

Point_to_deformable_curve joint

2

node/vector/coordinates

OptiStruct

24

Point_to_deformable_surface joint

2

node/vector/coordinates

OptiStruct

25

Translational_2N joint

2

none/systems

PAM CRASH 2G

26

Revolute_2N joint

2

none/systems

PAM CRASH 2G

27

Cylindrical_2N joint

2

none/systems

PAM CRASH 2G

28

Universal_2N joint

2

none/systems

PAM CRASH 2G

29

Flexion-Torsion joint

2

none/systems

PAM CRASH 2G

30

Planar_2N joint

2

none/systems

PAM CRASH 2G

31

General joint

2

none/systems

PAM CRASH 2G

32

Bracket joint

2

none/systems

PAM CRASH 2G

33

Free joint

2

none/systems

PAM CRASH 2G

 

Subpanels and Inputs

The FE Joints panel contains the following subpanels and command buttons:

hmtoggle_arrow1Create

Panel Inputs

Input

Action

joint type

Choose the joint type to create.

orientation

Select the orientation type.

Only appears in the PAM-CRASH 2G user profile.

nodes

Select the appropriate number of nodes for the selected element.

 
hmtoggle_arrow1Update

Changing Types:

Changing a spherical joint that uses orientation nodes to any other joint type causes the orientation value to be set to none and the nodes eliminated from the element, except in the case detailed below.

Changing a joint type to another that requires the same number of nodes does not change the nodes.

Changing a joint type to another that requires less nodes cause the extra nodes to be removed from the element.

Changing a joint type to another that requires more nodes is possible under certain circumstances.

•The nodes option is also selected, and the appropriate nodes are chosen. For example, to convert a 4-noded joint to a 6-noded joint, nodes 5 and 6 must be specified.
•A 2-noded joint with orientation nodes is being converted to a 4-noded joint. In this case the orientation nodes are used in the new element.

 

Changing Nodes:

When an element’s nodes are being updated, only the nodes specified are replaced. The other are left unchanged. For example, changing a 6-noded joint's nodes and picking nodes 2 and 6 leaves nodes 1, 3, 4, and 5 the same.  Nodes 2 and 6 are then updated.

 

Changing Properties:

Properties are updated for all selected elements if the box is checked.

 

Changing Orientation:

Changing the orientation of non-spherical joints to nodes causes the update operation to fail for that joint. The failed joint is then placed in the saved mark.

 

Panel Inputs

Input

Action

elems selector

Pick the joint elements you want to update.

joint type

Choose the joint type to create.

orientation

Select the orientation type.

Only appears in the PAM-CRASH 2G user profile.

nodes

Select the appropriate number of nodes for the selected element.

 
hmtoggle_arrow1Command Buttons

The following action buttons appear throughout the subpanels:

Input

Action

create

Creates the FE Joint.

reject

Rejects the recent changes made.

review

After each joint element is selected, its type, orientation and property is displayed in the panel.

update

An update menu is displayed. Select the desired items to update type, nodes, property, orientation. Only the selected information is updated.  Joints that cannot be updated are placed on the saved mark.  If you click elements and then select retrieve on the extended entity selection menu, the failed entities are highlighted.

return

Exits the panel.

 

See Also:

Alphabetical List of Panels