Hi Christoph,
I want to modify source code which can calculate net force on whole mesh moving in granular particles. That mesh is spherical type. Currently, we can measure force on triangles of the sphere. Can you give me some hints for doing this?
Thanks,
Ram
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ckloss | Tue, 11/16/2010 - 09:57
you don't need to modify
you don't need to modify anything, its already there - have a look at doc for fix mesh/gran/stressanalysis
Christoph
raguelmoon | Tue, 11/16/2010 - 10:48
Hi, In the doc pages, it is
Hi,
In the doc pages, it is written as :
....the pressure and shear force on each triangle of the mesh is evaluated...
but I want to calculate total force on whole sphere (mesh) due to granular particles, not on each triangle of the sphere(mesh). I want to show that net force (on sphere) as function of time or height (of container in which the sphere is moving). Do you understand?
Thanks,
Ram
ckloss | Tue, 11/16/2010 - 11:00
Would you mind reading the
Would you mind reading the output info in the doc?
raguelmoon | Tue, 11/16/2010 - 14:07
Hi, Thanks, Sorry for
Hi,
Thanks, Sorry for ignoring that.
Best,
Ram
raguelmoon | Sun, 11/21/2010 - 13:07
reduce to scalar?
Hi,
There are three force components on the mesh by output of fix mesh/gran/stressanalysis. Should I reduce these three vectors to one net force(scalar) or not? If I need net force along z-axis or total force on the mesh then what should I do?
Thanks,
Ram
ckloss | Sun, 11/21/2010 - 16:02
If you have the three
If you have the three components of the force and want the magnitude or the z-component, where is the problem?
Christoph
raguelmoon | Mon, 11/22/2010 - 06:08
Hi, want
Hi,
want magnitude...
Thanks,
Ram
schteppe | Tue, 07/05/2011 - 09:08
Hi, I am using
Hi, I am using mesh/gran/stressanalysis successfully - works great. I just need a clarification.. The total force on the mesh is output as a 3-vector, is this the total vector sum of forces? If I got a box with equal sized forces exerted on the center of each side toward the sphere CM, the output from stressanalysis will be zero, right?
ckloss | Tue, 07/05/2011 - 09:14
yes it is the sum >>If I got
yes it is the sum
>>If I got a box with equal sized forces exerted on the center of each side toward the sphere CM,
>>the output from stressanalysis will be zero, right?
the time-average will be zero, yes
Cheers,
Christoph