• Tii
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  • Registered: 2013-04-15
  • Posts: 14

Topic: Failure Surface CC3DNonLinCementitious2

Hello everyone,
I have a question concerning the failure criterion of the CC3DNonLinCementitious2 material. Its using the Willam-Menetery failure surface in the triaxial stress state. Does it use this criterion for the biaxial stress state too or does it use the biaxial failure surface according to Kupfer like the SBeta material?
In the ATENA Theory manual it sounds like the constitutive model uses Willam-Menetery for the biaxial stress state too but in my opinion it describes the concrete (especially high strength concrete)  in the biaxial stress state insufficient.

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  • dpryl
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  • Registered: 2007-07-13
  • Posts: 1,107

Re: Failure Surface CC3DNonLinCementitious2

Dear Tii, in the 3DNonLinearCementitious2 material model family, biaxial state is simply a special case, covered by the general triaxial formula.

You might be interested in the 3DNonLinearCementitious3 material model, which has some confinement-related improvements over the NLCem2 model. Please see the description in ATENA Theory, 2.2.12 Confinement-sensitive constitutive model.

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