Axial + Hinge Connectors / Displacement Issues

[ulloap]

Hello,

I'm trying to simulate a mechanism on which I have two movements as follows:

1. Linear Movement in U1 through an Axial Connector.

2. Angular Movement in U1 through a Hinge Connector.

Steps

Step 1 ------------------- Movement 1. -3 inches-

Step 2 ------------------- Movement 2., -6.28 rad- holding the position of Movement 1.

The problem is that if I perform Movement 1., Movement 2. doesn't run or If I perform Movement 2., Movement 1. doesn't run.

I am guessing that my connectors are not set properly.

Any advice will be helpful.

Regards

 

[FEA way]

How are the connectors applied ? I can't see the wire used for the hinge connector - is it just defined between two points having the same coordinates ? Wouldn't the cylindrical connector (with both U1 and UR1 available) do the job here ?

 

[ulloap]

Hello FEA way !

First off, thanks for your reply!

The hinge connector is connected to the ground, so the wire is not shown.

The same point is used as point "a" in the axial connector as a center pivot.

Please refer to the following picture:

Regards

 

[FEA way]

Could you share the .cae file (can be with that roller simplified to a regular cylinder) ? I'm not sure exactly how you defined BCs, local orientations and nodes for the connectors.

 

[ulloap]

Hello, FEA way

As requested, please find the CAE file.

Many thanks for considering it to review.

LPUS

 

[FEA way]

This file can't be downloaded, likely because of its name. Please try uploading again without spaces in the name.

 

[ulloap]

FYI

 

[FEA way]

What's the purpose of that MPC and fixed BC ? They seem to be unnecessary here.

This approach won't work. If you enable the display of connectors in the results, you may notice the coordinate system of the hinge connector rotating in place. Removing the hinge and rotating the endpoint of the axial connector won't help either. Instead, you could try the Cartesian + Align connector combination.

 

[ulloap]

Hello FEA_way,

Thanks a lot for your advice, it does work like a charm!