I'm modeling a 2D model where zero thickness cohesive elements are inserted in between the faces of all the solid elements. And under load, the cohesive elements will damage and some solid elements surrounded by cohesive elements that have all damaged will move freely in the model because there is no self contact defined. However, I don't know how to define self contact for such problem as the surface cannot be defined before the simulation for the faces of inner solid elements. Thank you very much for your help!
Dear Jiahao Shen ,
there are two different ways to apply the cohesive properties to the model;
1) Cohesive element
2) Cohesive surface
most of the time, it is necessary to use the zero thickness elements (for example for fatigue crack growth), but how to do this?
after meshing your model (with normal element and cohesive elements) in the Mesh modulus, choose the "Mesh" from the top toolbar, the Edit mesh window will be appeared. Choose "Node" for category and "Edit" for method.
after that, you have to select the nodes on the both sides of the cohesive layer! and press "Done" on the bellow bar.
The "Edit Nodes" window will be appeared. you can see the location of the selected nodes in the window. select "Coordinates" for the "specification method".
now you have to import the new location of zero thickness cohesive layer. if the cohesive elements layer is horizontal, you have to just edit the "Y" value that is shown with "2" in Abaqus software. inter an average of two given number ((minimum+maximum)/2) in the box in front of "2".
Also you should deactivate the "Project to geometry" !
after this, you can have the cohesive elements with zero thickness!!!
I hope that you can do this.
Best regards, S M.
Dear Jiahao Shen ,
there are two different ways to apply the cohesive properties to the model;
1) Cohesive element
2) Cohesive surface
most of the time, it is necessary to use the zero thickness elements (for example for fatigue crack growth), but how to do this?
after meshing your model (with normal element and cohesive elements) in the Mesh modulus, choose the "Mesh" from the top toolbar, the Edit mesh window will be appeared. Choose "Node" for category and "Edit" for method.
after that, you have to select the nodes on the both sides of the cohesive layer! and press "Done" on the bellow bar.
The "Edit Nodes" window will be appeared. you can see the location of the selected nodes in the window. select "Coordinates" for the "specification method".
now you have to import the new location of zero thickness cohesive layer. if the cohesive elements layer is horizontal, you have to just edit the "Y" value that is shown with "2" in Abaqus software. inter an average of two given number ((minimum+maximum)/2) in the box in front of "2".
Also you should deactivate the "Project to geometry" !
after this, you can have the cohesive elements with zero thickness!!!
I hope that you can do this.
Best regards, S M.
S M Anas Thank you very much for your answer! I do understand how to insert zero thickness cohesive elements into the model. However, my question is how to add self contact or other kind of control to the solid elements to stop them from moving freely after the total damage of the cohesive elements around the solid elements. I am sorry if I didn't make that clear in the question.
Dear Jiahao Shen,
for your application I suggest to explore cohesive interaction in Abaqus user manual.
Best regards
AG
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