Hello Guys
I know so many of you have the same question when you start using cohesive element in abaqus.
This section is a bit confusing E/Enn does not mean dividing. It simply means Young modulus (E) or Stiffness (Enn).
Now the question is which one you need to use:
This depends on what type of section you are gonna select. when you want to create section you have three options:
1-use analysis default
2-use nodal coordinate
3-specify
**If you use first one then abaqus assume cohesive thickness 1 therefor you need to use stiffness (Enn) for property. in order to calculate stiffness you can simply divide your Young modulus to the thickness of cohesive element.
Example:
Imagine our young modulus is E=8000 MPa and the thickness of cohesive is 0.05 so the Enn= 8000/0.05= 160000
** if you use nodal coordinate abaqus will use the actual thickness in the model therefore you need to use Young modulus (E).
The second way is much easier but sometimes for flexible materials with very low Young modulus (Like less than 5 MPa) is better to use stiffness as you are gonna have better convergence. This is my personal experience so I am not sure if other experienced the same.
check out my tutorials for more information:
https://www.udemy.com/abaqus-tutorial-intermediate/?couponCode=RESEARCHGATE-1
Hello Guys
I know so many of you have the same question when you start using cohesive element in abaqus.
This section is a bit confusing E/Enn does not mean dividing. It simply means Young modulus (E) or Stiffness (Enn).
Now the question is which one you need to use:
This depends on what type of section you are gonna select. when you want to create section you have three options:
1-use analysis default
2-use nodal coordinate
3-specify
**If you use first one then abaqus assume cohesive thickness 1 therefor you need to use stiffness (Enn) for property. in order to calculate stiffness you can simply divide your Young modulus to the thickness of cohesive element.
Example:
Imagine our young modulus is E=8000 MPa and the thickness of cohesive is 0.05 so the Enn= 8000/0.05= 160000
** if you use nodal coordinate abaqus will use the actual thickness in the model therefore you need to use Young modulus (E).
The second way is much easier but sometimes for flexible materials with very low Young modulus (Like less than 5 MPa) is better to use stiffness as you are gonna have better convergence. This is my personal experience so I am not sure if other experienced the same.
Hello Guys
I know so many of you have the same question when you start using cohesive element in abaqus.
This section is a bit confusing E/Enn does not mean dividing. It simply means Young modulus (E) or Stiffness (Enn).
Now the question is which one you need to use:
This depends on what type of section you are gonna select. when you want to create section you have three options:
1-use analysis default
2-use nodal coordinate
3-specify
**If you use first one then abaqus assume cohesive thickness 1 therefor you need to use stiffness (Enn) for property. in order to calculate stiffness you can simply divide your Young modulus to the thickness of cohesive element.
Example:
Imagine our young modulus is E=8000 MPa and the thickness of cohesive is 0.05 so the Enn= 8000/0.05= 160000
** if you use nodal coordinate abaqus will use the actual thickness in the model therefore you need to use Young modulus (E).
The second way is much easier but sometimes for flexible materials with very low Young modulus (Like less than 5 MPa) is better to use stiffness as you are gonna have better convergence. This is my personal experience so I am not sure if other experienced the same.
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