Tube-to-tube contact element library | ||||||||
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ProductsAbaqus/Standard
Element types
- ITT21
Tube-to-tube element for use with two-dimensional beam and pipe elements
- ITT31
Tube-to-tube element for use with three-dimensional beam and pipe elements
Active degrees of freedom
ITT21: 1, 2
ITT31: 1, 2, 3
Additional solution variables
ITT21: Two additional variables relating to the contact forces.
ITT31: Three additional variables relating to the contact forces.
Nodal coordinates required
ITT21: X, Y
ITT31: X, Y, Z
Element property definition
Input File Usage
Use the following option to identify the second (outer) pipe with which the specified ITT contact elements on the first (inner) pipe can interact:
SLIDE LINE
Use the following option to give the radial clearance between the pipes as a positive number when modeling a tube sliding within another tube:
INTERFACE
When the elements are modeling contact between the exterior surfaces of two pipes, the sum of the external radii of the pipes is given as a negative number.
Element-based loading
None.
Element output
Stress components
- S11
Normal component of the force between the two pipes.
- S12
Shear force between the two pipes, parallel to the axis of the second (outer) pipe.
- S13
Shear force between the two pipes, normal to the contact direction and to the axis of the second (outer) pipe (for ITT31 only).
Strain components
- E11
Overclosure of the surfaces in the direction normal to the tangent to the centerline of the second (outer) pipe.
- E12
Accumulated relative tangential motion between the two pipes, parallel to the axis of the second (outer) pipe.
- E13
Accumulated relative tangential motion between the two pipes, normal to the contact direction and to the axis of the second (outer) pipe (for ITT31 only).