AXIAL

Connection type AXIAL provides a connection between two nodes where the relative displacement is along the line separating the two nodes. The AXIAL connection models discrete physical connections such as axial springs, axial dashpots, or node-to-node (gap-like) contact.

This page discusses:

See Also
Connector Elements
Connector Element Library
In Other Guides
*CONNECTOR BEHAVIOR
*CONNECTOR SECTION

ProductsAbaqus/StandardAbaqus/ExplicitAbaqus/CAE

Description

Figure 1. Connection type AXIAL.

The AXIAL connection does not constrain any component of relative motion. The distance between nodes a and b is

l=xb-xa.

The available component of relative motion, u1, acts along the line connecting the two nodes, measures the change in distance separating the two nodes, and is defined as

u1=l-l0,

where l0 is the initial distance from node a to b. The connector constitutive displacement is

u1mat=l-l1ref.

The kinetic force is

faxial=f1q,    where    q=1xb-xa(xb-xa).

In Abaqus/Standard an optional orientation can be provided at one of the nodes in an AXIAL connection to provide direction for the force if the nodes are coincident or when one of the nodes is a “ground node.” If the orientation is provided at both of the coincident nodes, the orientation at the first node in the connectivity will be used. The orientation definitions remain fixed during the analysis and will be ignored when the two nodes separate. Rotational degrees of freedom are not activated for connection type AXIAL.

Summary

AXIAL
Basic, assembled, or complex: Basic
Kinematic constraints: None
Constraint force output: None
Available components: u1
Kinetic force output: f1
Orientation at a: Optional
Orientation at b: Optional
Connector stops: l1minll1max
Constitutive reference lengths: l1ref
Predefined friction parameters: None
Contact force for predefined friction: None