• From: Aachen, Germany
  • Registered: 19-05-2008
  • Posts: 32

Topic: Interface3dtrlin element and masonry02 material model

Hi,

it seems that material model masonry02 is limited do 2d and hence cannot be used by Interface3dtrlin.
Is this correct?
Is it intended  to extend masonry02 to 3d in the nearer future?
Would it be possible for a rather unexperienced programmer to modify sources to obtain 3d capability with masonry02?




Thanks for comments/answers.

Regards
Joachim Hannawald

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  • From: Gothenburg, Sweden
  • Registered: 08-09-2009
  • Posts: 1,419

Re: Interface3dtrlin element and masonry02 material model

Hi Joachim. masonry02 is indeed limited to 2D interfaces (lines).
It is probably among the trickiest material routines. First one would need to derive the theory for 3D, but I can't even find the original article to check.

3 Reply by bp

  • bp
  • Administrator
  • Offline
  • From: Prague, Czech Rep.
  • Registered: 02-03-2007
  • Posts: 1,047

Re: Interface3dtrlin element and masonry02 material model

Joachim,
I can confirm that at present, the masonry model is limited to 2D. Its extension to 3D is possible, in fact the model is implemented as multi-surface plasticity model. In oofem, there is a general purpose multi surface plasticity implementation, so its only necessary to supply suitable combination of yield functions, each with hardening/softening laws, as done in masonry material in 2D. The masonry model contains only the definition of individual yield/load surfaces, hardening laws, and their gradients. Therefore, the extension into 3d should consist of extending individual yield-surfaces to 3D. The individual surfaces should evolve in consistent fashion, to make multi surface return convergent.

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