Hi,
I modeled unidirectional CFRP cutting process in ABAQUS using Hashin failure criteria. Unfortunately, many researchers did not report the used fracture energies in their model. I found different amounts for these parameters in some papers. But I don't know which one is more appropriate to use for cutting model
I would appreciate it if you could reply my question.
Thank you
Hashin damage -> Damage Evolution (the used unit in my model in mm, Mpa,...)
I found these failure energies in other researches:
- Rentsch 2011: GLT 0.01 , GLC 0.005, GTT 0.0009, GTC 0.006 (without unit!)
- Soldani 2010: 105 J/m2, (fiber tension); 200 J/m2 (fiber compression), 300 J/m2 (matrix cracking) and 600 J/m2 (matrix crushing)
-Camanho 2007 : fiber tension 81.5 KJ/m2, fiber compression 106.5 KJ/m2, matrix tension 0.2774 KJ/m2, matrix compression 5.62 KJ/m2
Coelho 2015 : G1Tc (N/mm), 89.8 G1Cc (N/mm), 78.3 G2Tc (N/mm) 0.23, G2Cc (N/mm) 0.76
phadnis 2012: Gft,c 12.5 [N/mm], Gfc,c 12.5 [N/mm], Gmt,c 1 [N/mm] Gmc,c 1 [N/mm]
Shi 2012: fracture toughness (kJ/m2) : GT1C 91:6, GC1C 79:9, GT2C 0:22, GC2C 1:1
Hi,
I used Shi 2012: fracture toughness (kJ/m2) : GT1C 91:6, GC1C 79:9, GT2C 0:22, GC2C 1:1 and got good agreement with the experiment in transverse impact simulation of CFRP strengthened CFST columns.
Hi,
I used Shi 2012: fracture toughness (kJ/m2) : GT1C 91:6, GC1C 79:9, GT2C 0:22, GC2C 1:1 and got good agreement with the experiment in transverse impact simulation of CFRP strengthened CFST columns.
Dear Md Iftekharul Alam ,
Thank you so much for your response. I used mm, Mpa Unit for modeling. should I used the fracture energy in KJ/m2 unit?
Thank yo again for your help.
Hi,
I used m, N, Pa, J, kg/m3 unit. thus I kept fracture toughness as J/m2. In your case you may have to use MJ/m2. Please have a look this unit conversion site for ABAQUS: https://www.sharcnet.ca/Software/Abaqus/6.11.2/books/popups/usb-tbl.html
Hi,
I try to carry out special reserach on CFRP material. My question is: What units should define foru fracture energyies in damage evolution (Hashin Criterion). In according to last table in link http://129.97.46.200:2080/v6.14/books/popups/usb-tbl.html, energy have unit mJ - when I defined numerical model in mm and MPa..
Please help me in this problem..
I think that J/mm2 is the unit of Toughness but Fracture energy unit is the J or MJ
Dear Md Iftekharul Alam and Behzad Ghafarizadeh,
I am working in my thesis and it´s about a 3 point bending test applied to a carbon fiber skined sandwich, so for my model in Abaqus I need de damage evolution criterion. Do you have the name of the article you are making reference of? (Shi 2012). Or If you could share it to me it would be great.
Thank you very much for your time and help. Have a nice day.
Dear @Elias Martinez
I will send my full paper by massage including damage criterion.
https://link.springer.com/article/10.1007%2Fs00170-016-8482-y
Hi,
Dear Behzad, how did you use damage evolution parameter base on Shi's paper (2012)???
Because strength of your composite and carbon fiber are difference with Shi.
Behzad Ghafarizadeh
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