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Homard Module - Mesh Refinement during FEA (plasticity)

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Homard Module - Mesh Refinement during FEA (plasticity)

Posted by Markus Schulten at January 07. 2020

Hi,

is it possible to do nonlinear FEA calculations with Salome Meca and the Homard Module?

I need during my load step at t=t1 some mesh refinement because of large mesh distortion (metal plasticity).

Does Homard remesh automatically at t=t1, project the time history variables and boundary conditions to the new mesh and go on further with the calculation at t=t1+delta_t?

 

Kindly regards

Markus

Re: Homard Module - Mesh Refinement during FEA (plasticity)

Posted by Gérald NICOLAS at December 11. 2020

Hi,

HOMARD is only a mesh transformer. HOMARD is given a mesh with instructions to control the refinement either as fields on nodes or cells with a threshold, or as geometric areas. A new mesh is created by dividing the selected cells. If necessary, a conformal connection is created between the different regions. On request, the fields expressed on the nodes or cells are interpolated.

Two points are important:

HOMARD does not know the schema in time. The user has to define his own strategy for the choice of the instants when there will be refinement.
HOMARD does not modify the distortion of the meshes because it only cuts them: their shape remains identical. HOMARD is used to reduce the size of the meshes but not to improve their quality.
 
Gérald
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