FEA Stress recovery triangular element
FEA Stress recovery triangular element
(OP)
Hi,
I am currently writing a FEA program. I cannot find any information on how to extrapolate stresses from Gaussian points to the corner nodes.
The mesh constists of six noded triangular elements. The stresses are calculated on four Gaussian points. The shape functions are in terms of natural coordinates.
Does anyone know how the stress recovery for triangular elements work?
Kind regards
Katharina
I am currently writing a FEA program. I cannot find any information on how to extrapolate stresses from Gaussian points to the corner nodes.
The mesh constists of six noded triangular elements. The stresses are calculated on four Gaussian points. The shape functions are in terms of natural coordinates.
Does anyone know how the stress recovery for triangular elements work?
Kind regards
Katharina





RE: FEA Stress recovery triangular element
http://www.colorado.edu/engineering/CAS/courses.d/...
http://imechanica.org/node/10439
http://eprints.qut.edu.au/13842/2/13842.pdf
RE: FEA Stress recovery triangular element
I would like for the simple linear interpolation, but ..
I checked the references. For reference 3, the number of Gaussian points and nodal stresses must be equal (I think), which is not the case.
I know how to do a linear interpolation for cartesian coordinates but not for natural coordinates. For a quadratic element the interpolation would be very easy.
Can anyone help? Does anyone have an example?
RE: FEA Stress recovery triangular element
RE: FEA Stress recovery triangular element
But I could just use three Gaussian points and use the shape functions for the extrapolation, as I still don't know how to do a linear extrapolation with natural coordinates (it should be fairly simple though).
Thanks for your help! :)
If anyone else knows anything about stress extrapolation, I am happy about any hint.
RE: FEA Stress recovery triangular element