• sas
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  • Registered: 26-10-2007
  • Posts: 52

Topic: Cohesive material

Hi,

Is there any record of anyone using cohesive zone modeling with OOFem?

Thanks

  • From: Vancouver-Canada
  • Registered: 19-05-2007
  • Posts: 60

Re: Cohesive material

Hi,

I have used the scalar damage model and rotating crack model to simulate cohesive crack growth using OOFEM and both worked fine!

Cheers,
Alireza

  • sas
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  • Registered: 26-10-2007
  • Posts: 52

Re: Cohesive material

Great news! Do you have any shareable reference (paper, conference proceeding, report, etc.) where I can see some details?

Thanks a lot!

  • From: Vancouver-Canada
  • Registered: 19-05-2007
  • Posts: 60

Re: Cohesive material

For the theory of the Smeared Crack and how it can be used to model cohesive cracks, Check Prof. Bazant's fracture mechanics book!
Also for the rotating crack model, you can find some information and examples in Prof. Milan Jirsaek's papers on "rotating crack"

Cheers,
Alireza

5 Reply by bp

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

Re: Cohesive material

Hi sas,

sorry for late reply, I have missed this post somehow.
Although oofem comes with many fracture models based on smeared approach, there is also the possibility to have a discrete crack with cohesive constitutive law.  To achieve this, you should use interface elements (quadratic one is available) and corresponding cohesive law. These interface elements are quite simple, so there is no problem to implement another one, if needed. For example, this has been used to simulate failure of brick wall, which appears from time to time on oofem top page. The disadvantage is, that you must manually place interface elements along assumed crack path, but for certain applications this is fine.

Best regards,
Borek

bp's Website

  • Registered: 18-06-2011
  • Posts: 1

Re: Cohesive material

Moist granular soil that contains some cohesive material will exhibit signs of cohesion between particles. "Plastic" means a property of a soil which allows ...