## local coordinates system

## local coordinates system

(OP)

Hello everyone. I have to define a local co-ordinate sytem in my model. Wjat i did was modified the material angle. is that the right way to do? by default would i be getting all the stresses in the local or global direction? if i get it in global how do i get the results in the local coordinate. is there a way i could switch my solutions back forth between local and global? thanks.

Ananth

Ananth

## RE: local coordinates system

## RE: local coordinates system

## RE: local coordinates system

Garland E. Borowski, PE

## RE: local coordinates system

## RE: local coordinates system

Garland E. Borowski, PE

## RE: local coordinates system

## RE: local coordinates system

## RE: local coordinates system

http://w

If for some reason is doesn't work, log in (registration is free), follow the "knowledge database" and select tutorials. This is one on "Extracting Internal Loads". It should be helpful.

Garland E. Borowski, PE

## RE: local coordinates system

## RE: local coordinates system

Garland E. Borowski, PE

## RE: local coordinates system

Without knowing detailed specifics of the coordinate systems, element orientation and desired material angles it is impossible to diagnose your issue. I suggest that you build a very small, simple flat plate model in the y-z plane, apply a simple axial load, define a material coordiante system that is rotated at 45 degrees in the y-z plane, and run the model 3 times getting stresses in the basic, element and material directions. If you do this and still can't understand the results then post a description of your results and we will take it from there.

## RE: local coordinates system

## RE: local coordinates system

Next i changed the material angle and ran the analysis without changing the ELEMRSLTCORD parameter in the ne editor. it was by default basic( i assume basic means global)..i got some results from this analysis. next i turned the elemrsltcord parameter to material and i ran the analysis. i still get the result as i get in the earlier procedure i.e; elemrsltcord=basic.

I don't understand this. Could you please englighten me? thanks once again for your patience and time.

## RE: local coordinates system

## RE: local coordinates system

## RE: local coordinates system

Instead of describing the results as "weird" please use quanitative terms. You need to more fully describe your model and results, such as: A plate of dimensions X by Y located in the ?? plane, loaded with ?? loads in the ?? direction with ?? boundary conditons on the ?? edge. The stress in the plate should be ?? by hand analysis. The results for the stress in the ?? direction in the ?? coordinate system are ??, etc., etc. If you cannot describe your model and results in this detail there is no way we can give you specific answers.

## RE: local coordinates system

## RE: local coordinates system