How to define or What should be the Approximate value for Elastic > Traction (E/Enn, G1/Ess, G2/Ett )for cohesive region deletion.
I could not find it in the literature.
In the literature I can only find is Normal strength, Shear strength, Damage evolution values.
Dear Bilal,
The cohesive traction–separation law is defined by many scientists so far. The most common which are used for modelings are linear and bilinear, form (Camacho & Ortiz, 1996) & (Geubelle & Baylor, 1998).
You should be aware of how to select the constitutive response of the cohesive elements. Then, it is important to define interactions properly such as mesh bias to the vicinity of the stress zone, due to a large gradient of stress changes at the interface and cohesive element as a suitable element type.
As far as I know, to ascertain the property of linear elastic traction-separation, you have to know the exact parameters and calculate them rather than using other data. If you use a non-unit thickness for the cohesive element, then you should consider as:
E_nn = E/(Adhesive Thickness)
E_ss = G1/(Adhesive Thickness)
E_tt = G2/(Adhesive Thickness)
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