For a Traction Separation interface behaviour, there are three property values to be set: E/Knn, G1/Kss & G2/Ktt. I am looking for the method to determine/calculate the values.
How to calculate value of E/Knn, G1/Kss & G2/Ktt
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标签： Cohesive
Cohesive element or surface-based cohesive behaviour
Abaqus 中提供了两种方式来模拟界面问题：1. cohesive element；2. surface-based cohesive behavior。其中后一种是在界面的两侧的两个表面之间定义一个相互作用（interaction）来模拟界面特性。
damage or cohesive behavior options cannot be specified for this type of interaction
Abaqus error message “The interaction “Int-1″ references a contact property (IntProp-1) that contains the damage or cohesive behavior option. These options cannot be specified for this type of interaction.”
Surface based COHESIVE BEHAVIOR cannot be used for contact pair interactions.
Surface-based cohesive behavior 用于模拟 bonded interface。 但是它不用用于 Surface to Surface Interaction. 否则会遇到错误提示，”Surface based COHESIVE BEHAVIOR cannot be used for contact pair interactions. See the surface iteraction named INTPROP-1.”
cohesive behavior contact interaction
Typically, Abaqus has two methods for simulating the bonded interface behavior between two entities. One is Cohesive Elements, and another is Surface-based cohesive behavior. When thickness of the interface is negligible, surface-based cohesive method is recommended for its convenience and effectiveness.