Difference between U2 and UR3 in Cylindrical Coordinate System in Abaqus 1

[teedit]

Can anyone explain what the difference is between U2 and UR3 in a cylindrical coordinate system in Abaqus? There is definitely a difference, I just can't seem to come up with a good explanation. Also, I'm assuming U2 is in units of radians but I question that assumption. I assume UR3 is in units of radians.

 

[compositesFEAguru]

Hi teedit - I can see where you are coming from, but in Abaqus all coordinate systems at a point are Rectangular coordinate systems. So if you define a cylindrical coordinate system, at a particular point U2 = tangential displacement, UR3 = rotation about local "z" axis (axis that runs throught the point of interest and is parallel to the cylindrical coordinate system axis). Sort of tough to explain without a picture so you may want to refer to 2.2.5 in the Abaqus Analysis User's Manual.

Hope this helps...

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[teedit]

Thanks for your input. So does that means that U2 in cylindrical coordinates is in units of length and UR3 is in units of radians?

 

[compositesFEAguru]

Yes

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