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- From: natarsu@mse.ogi.edu (N. Sukumar)
- Newsgroups: sci.engr.mech
- Subject: Nodal force calculations in a FE analysis
- Message-ID: <40490@ogicse.ogi.edu>
- Date: 24 Jul 92 09:27:38 GMT
- Article-I.D.: ogicse.40490
- Sender: news@ogicse.ogi.edu
- Distribution: world
- Organization: Oregon Graduate Institute, Material Science & Engineering
- Lines: 33
-
-
- Hi! I hope the solution to what follows turns
- out to be simple.
-
- I am interested in computing the nodal forces
- (not the reactions !) at certain nodal points in my
- FE analysis; am performing a structural analysis (static)
- with quadratic isoparametric elements. As far as I
- know, the system (ANSYS) does not give me the nodal
- values. Is there a simple way (via calculations) or
- by a re-analysis (submodel ?) to accomplish the above
- task.
-
- I was contemplating on starting from 1st
- principles: assume a quadratic variation over
- the element edge for the stresses, and then use
- the basic definitions of the nodal forces in
- terms of the elemental shape functions and stresses
- to set-up a simultaneous eqn. relating the coefficients
- in the stress-expansion and the nodal forces. Since I know
- the coefficients (the nodal stresses are known), I
- can compute the unknown forces. Is this OK ? Anyway,
- I reckon I'm off on a tangent ...... I'm definitely
- missing something !
-
- Any help/pointers will be appreciated.
-
- Thanks in advance.
- -suku.
- --
- N. Sukumar Home Phone: (503)-690-3097
- Department of MS&E Work " : (503)-690-1121 (X7451)
- Oregon Graduate Institute ****** BLAZERS IN 1993 ******
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