ALIGN

Connection type ALIGN provides a connection between two nodes where all three local directions are aligned. If both local axes are given and do not align initially, their initial relative angular position is held constant.

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 ALIGN.

The ALIGN connection imposes kinematic constraints only. The local directions at node b are set equal to those at node a. If the local directions do not align initially, the ALIGN connection holds fixed the Cardan angles between the local orientation directions at node b, { e 1 b , e 2 b , e 3 b } , and those at node a, { e 1 a , e 2 a , e 3 a } . These fixed angular positions are the connector position output quantities. See connection type CARDAN for a definition of Cardan angles and for the constraint moment if the local directions do not align.

The constraint moment enforcing the alignment of the local directions is

m¯=m1⁢e1a+m2⁢e2a+m3⁢e3a.

In two-dimensional analysis m1=m2=0.

Summary

ALIGN
Basic, assembled, or complex: Basic
Kinematic constraints: u⁢r1=0,u⁢r2=0,u⁢r3=0
Constraint moment output: m1,m2,m3
Available components: None
Kinetic moment output: None
Orientation at a: Optional
Orientation at b: Optional
Connector stops: None
Constitutive reference angles: None
Predefined friction parameters: None
Contact force for predefined friction: None