I have modelled a concrete sample of small dimension by using Concrete-Damage-Plasticity model. And now, I need to model a large dimension sample too. I am wondering if I could model this large sample by previous stress-strain curve which has been defined for small dimension one. plus, I would like to increase the mesh size in large dimension sample (from 1 to 6). Forasmuch as the CDP model has been defining by stress-strain curve and not stress-deformation curve, could I get the correct result for the large sample by same stress-strain curve or I firstly need to verify my model for large dimension sample?
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Hi Mirshad
As far as I know, till you scale your model properly, there will not be any difference between a small model and a large model. and stress-strain relation has no relation with the size of your model, as it is related to the material properties of that concrete which you are using.
good luck...
Hi Mirshad
any FEmodel needs mesh sensitivity analysis by comparing its results with experimental ones. as for tensile behaviour of CDP model with strain-type, you need to change the related tensile curve according to the characteristic length of the used mesh. while the displacement type does affected by mesh size (charcteristic length) but doesn'tt give good accuracy in comparison with strain type.
I hope my answer could help you
Good luck
https://www.researchgate.net/project/Mode-I-Fracture-Parameters-Using-Steel-Fibers-in-High-Strength-Concrete.
https://www.researchgate.net/publication/301348952_Licensed_Under_Creative_Commons_Attribution_CC_BY_Investigation_on_Mode_-_I_Fracture_Parameters_Using_Steel_Fibers_in_High_Strength_Concrete
Article Licensed Under Creative Commons Attribution CC BY Investigat...
Dear Raafat E S Ismail,
I appreciate your response. I can get from your response that I can use the stress-strain curve which has been defined for small sample with a difference. I mean if the characteristic length was 1 mm in small sample and this is equal to 6 mm in large sample, I have to multiply the defined values of strain by 6. Am I right?
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