Question #689676 on Yade changed:
https://answers.launchpad.net/yade/+question/689676
Status: Answered => Solved
nobody confirmed that the question is solved:
Hi Jerome,
So you mean that the principal directions are in the global system?
######################
Hi Jan,
The local system I'm referring is the system on every particle itself.
>>>both "the equation above" and "adding the stress in each direction" has
>>>nothing to do with principal directions..
Here I'm thinking that the principal stresses have different principal
directions, so if we want to get the overall stresses for RVE, we need to
decompose the principal stresses into the global system. So I think we need the
principal directions.
#########################
Hi Bruno,
Yeah, I refer to the system on the particle itself is the local system.
As I mentioned before, in order to get the overall stresses for a specified
volume, I need to decompose every principal stress into the global x, y, z,
axis and then added all the components in each direction so that I can get the
overall stresses with three components in the three global directions. this is
the reason I want to know whether the principal directions are in the global
system or not.
############
overall, with the information, you guys mentioned before. Now, I know that the
principal directions are in the global system.
thanks,
Yong
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