Topic: CC3Dnonlinear material model-reg
Dear Mr. Pryl,
(i) I am using Atena 3D for modelling concrete composite slabs. I am using CC3Dnonlinear material model for modelling concrete. I would like to know the constitutive modelling adopted for CC3Dnonlinear material model under compression. In this regard, I referred Atene Theory manual section 2.2.4. It was mentioned in theory manual that the elliptical ascending part is given by equation 2.57. The notations used in the equation are not clear and it does not matches with Fig.2.21. Kindly clarify the same and also provide any published reference for the same.
(ii) Whether the material model CC3Dnonlinear uses equivalent uniaxial stress-strain law similar to sbeta model?. The notation used in Fig.2.4 are not matching with Fig. 2.21. Please clarify the same.