|
[Sponsors] |
September 8, 2015, 08:07 |
Stress equations
|
#1 |
Super Moderator
Tobias Holzmann
Join Date: Oct 2010
Location: Tussenhausen
Posts: 2,708
Blog Entries: 6
Rep Power: 51 |
Dear all,
does anybody have references to the equations used in the stress solvers? Thanks in advance,
__________________
Keep foaming, Tobias Holzmann |
|
September 13, 2015, 12:37 |
|
#2 |
Senior Member
Jon Elvar Wallevik
Join Date: Nov 2010
Location: Reykjavik, ICELAND
Posts: 103
Rep Power: 19 |
Hi T.
Are you thinking about the sigmaEq = sqrt((3.0/2.0)*magSqr(dev(sigma))) in calculateStress.H ?? I have been thinking about the same thing. The best I have come up with is what is written in the book by Mase (Schaum's Outline of Continuum Mechanics by George Mase). See Equation (8.24), page 182. But that chapter is about "strain hardening rules" (increase in material strength by strain) which I dont think is relevant in the solidDisplacementFoam (Lamé constants of elasticity are constants here, i.e. not dependent on stress). So it would be nice to have another reference to the application of equivalent stress, in which constant elasticity is assumed. I have also just added von Mises (i.e. sqrt(S:S/2)) in to this part and used that. But I dont know how correct that is since I am not a specialist in solid mechanics. Hope this helps cheers J. |
|
September 14, 2015, 07:29 |
|
#3 |
Super Moderator
Tobias Holzmann
Join Date: Oct 2010
Location: Tussenhausen
Posts: 2,708
Blog Entries: 6
Rep Power: 51 |
Hi, your eqn is correct. Search for elastic Stress and Wikipedia. There are good references.
Kind regards Tobi
__________________
Keep foaming, Tobias Holzmann |
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
[ANSYS Meshing] Error in Workbench "Unable to attach to geometry file" | Jeremie84 | ANSYS Meshing & Geometry | 70 | October 25, 2017 16:03 |
UDS or UDF for modify shear stress equations..? | aeroprince1986 | Fluent UDF and Scheme Programming | 0 | April 14, 2015 04:16 |
Turbulence: Reynolds stress equations | kharicha | FLUENT | 0 | March 16, 2006 08:50 |
Turbulence: Reynolds stress equations | kharicha | Main CFD Forum | 0 | March 16, 2006 08:48 |
shear stress scalar definitions? | Novak Elliott | CFX | 0 | April 6, 2003 01:45 |