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# Define Hinge Axis that updates with assembly deformation in abaqus

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## Define Hinge Axis that updates with assembly deformation in abaqus

(OP)
Hello everyone,

I am looking to model an assembly that rotates and translates in space, it contains a hinge. Can i define the hinge axis such that its local axis (basically the x axis that it rotates about) updates as the assembly moves in space in Abaqus ?

Thanks and Regards,
Mitul Shah

### RE: Define Hinge Axis that updates with assembly deformation in abaqus

Use Connector elements - they do this by default. For example the Hinge connector allows one relative rotation of two nodes in a local coordinates system.

### RE: Define Hinge Axis that updates with assembly deformation in abaqus

Yes, hinge connector will account for this. It combines both JOIN and REVOLUTE connector types. So it joins two points and allows rotation about a single axis. Just keep in mind that you will have to define local coordinate system with X axis along hinge’s axis for this connector. You can use Connector Builder to speed up this process.

### RE: Define Hinge Axis that updates with assembly deformation in abaqus

(OP)
Hi,

I should have better explained the problem.

I am using a connector element for the hinge joint. 2 nodes at the end of the hinge define the hinge axis, the hinge axis is a local co-ordinate system with the x axis aligned to be axis of rotation for the hinge setup.
What I am trying to achieve is the hinge axis updating / moving as the 2 nodes that represent the end of the hinge move in space. What I am noticing is, in CAE, when we define the hinge axis, it does not update the axis orientation as the hinge moves / rotates.

Thanks and Regards,
Mitul Shah

### RE: Define Hinge Axis that updates with assembly deformation in abaqus

I doubt that. If you have a nonlinear procedure and NLGEOM is active, then the directions of the connector will update.

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