ALIGN

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.

The constraint moment enforcing the alignment of the local directions is

\bar{m} = m_{1} e_{1}^{a} + m_{2} e_{2}^{a} + m_{3} e_{3}^{a} .

In two-dimensional analysis $m_{1} = m_{2} = 0$ .

Summary

ALIGN
Basic, assembled, or complex:	Basic
Kinematic constraints:	$u r_{1} = 0, u r_{2} = 0, u r_{3} = 0$
Constraint moment output:	$m_{1}, m_{2}, m_{3}$
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