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Re: two different datums in sumulation
James Riddell Sep 11, 2018 7:45 AM (in response to Brian Gray)Those are not 'datums' (which has a very specific meaning in GD&T) but are really 'triads' which define the orthogonal directions. Looks like you are working with two different origins, one is for the body of the part but I can't really tell where the other one comes from with only your picture.
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Re: two different datums (triads) in sumulation
Sameer Qureshi Sep 27, 2018 6:58 AM (in response to Brian Gray)Hi Brian,
The Triad on the Left is the global model triad or co-ordinate system that you have used to create the part/assembly.
The Triad in the bottom right shows simulation specific orientation when you plot a result in a particular direction (Cartesian co-ordinate system) with respect to a reference plane or surface. You can do this by editing a result plot and choosing a reference under the 'Advanced Options'. (see image below for example where shear stress in XY has been plotted for a simple example).The triad in the bottom left can also change for cylindrical components or disks when you plot radial results using an axis reference point. The triad then changes to a polar co-ordinate system as indicated by the graphic in the bottom right in the image below.
I hope that helps.
Thanks,
Sameer