found it. thanks!
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Dear Marcos,
I suggest to first see ATENA Troubleshooting, 2.2.4 I want to use the user-defined stress-strain law of concrete to replace that used in ATENA program. How can I do it?, especially 1. How to get "l_ch"? Is it the crack band size? and 11. What does strain at localization (Tension Localization Onset) mean?
Regards.
yeah 
but it is a fair question
offtop: it looks like you are modeling the fib contest 
Hello,
It is not clear for me if the tension function of the 3DNonLinearCementitious2User is dependent of the mesh size.
The tutorial presents the fracture strain as the ratio between crack width and element size.
Thefore, I suppose that if the adjust was made considering a 3-point bending test in a prism with refined mesh, this adjust would not be the same for a beam with coarse mesh.
Is this interpretation correct?
Best regards
Dear preetwalia07, please see the response in the thread "atena sfrc beam". You may be also interested in the Tutorial for ATENA Science GiD FRC (available from our web in PDF format under Products - ATENA - Documentation).
Hi sir,
I am working on sfrc long beams on atena 3D v 5..for sfrc I have taken material model 3D non linear cementitious 2user..what values shall I give for volume fraction of 0.75 and aspect ratio 60 and concrete compressive strength 20N/mm2
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