This is an old revision of the document!



Warning: Declaration of syntax_plugin_mathpublish::handle($match, $state, $pos, &$handler) should be compatible with DokuWiki_Syntax_Plugin::handle($match, $state, $pos, Doku_Handler $handler) in /home/np29546/public_html/elmerice/wiki/lib/plugins/mathpublish/syntax.php on line 29

Warning: Declaration of syntax_plugin_mathpublish::render($mode, &$R, $data) should be compatible with DokuWiki_Syntax_Plugin::render($format, Doku_Renderer $renderer, $data) in /home/np29546/public_html/elmerice/wiki/lib/plugins/mathpublish/syntax.php on line 29

ForceToStress Solver

General Informations

  • Solver Fortran File: ForceToStress.f90
  • Solver Name: ForceToStress
  • Required Output Variable(s): Stress (user defined)
  • Required Input Variable(s): Force
  • Optional Output Variable(s): None
  • Optional Input Variable(s): None

General Description

For a given boundary, this solver computes the nodal normal stress equivalent to a given nodal normal force. This can be used also to infer the flux from the knowledge of a debit (should work also to infer a tangential stress from the knowledge of a tangential force).

SIF contents

In the SIF example below, the normal stress on a boundary is inferred from the 3rd component of the Stokes residual.

Solver 1
  Equation = "Navier-Stokes"
  Stabilization Method = String Stabilized
  Flow Model = Stokes
  ...

  Exported Variable 1 = Flow Solution Loads[Fx:1 Fy:1 Force:1 CEQ Residual:1 ]
  Calculate Loads = Logical True
End

Solver 2
    Equation = "ForceToStress"
    Procedure = File "ElmerIceSolvers" "ForceToStress"
    Variable = String "Stress"
    Variable DOFs = 1

    Linear System Solver = Direct
    Linear System Direct Method = umfpack
 End

! Solve this for body Id 2 (=boundary 3 here)
Equation 2
  Active Solvers(1) = 2
End

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Boundary Condition 3
  Target Boundaries = 5
  Body Id = 2
  ...
End

Examples

In this example, a pressure applied on a boundary is first integrated to get nodal force using the GetHydrostaticLoad Solver, and then the pressure is recovered using the ForceToStress Solver.

solvers/forcetostress.1359667872.txt.gz · Last modified: 2013/01/31 21:31 by gag
CC Attribution-Share Alike 4.0 International
www.chimeric.de Valid CSS Driven by DokuWiki do yourself a favour and use a real browser - get firefox!! Recent changes RSS feed Valid XHTML 1.0