Cohesive bond
Cohesive bond
(OP)
Hello,
I'm trying to simulate a cohesive bond in Abaqus. It is supposed to connect two 3D elastic blocks which are in contact on one side. Since the interface thickness is negligible in my problem, I tried to use a cohesive surface interaction and I set the cohesive behavior and damage properties. The aim of my simulation is to analyze the progressive debonding which occurs for big displacements between the blocks. However when I fix one block and I impose a displacement for the other one (Bounday Conditions), I can't complete my analysis with Abaqus, which fails exactly when the most solicited part of the bonding gets damaged. What should I do? Am I using a correct procedure for my problem or should I try something else like a user subroutine?
Thank you very much.
I'm trying to simulate a cohesive bond in Abaqus. It is supposed to connect two 3D elastic blocks which are in contact on one side. Since the interface thickness is negligible in my problem, I tried to use a cohesive surface interaction and I set the cohesive behavior and damage properties. The aim of my simulation is to analyze the progressive debonding which occurs for big displacements between the blocks. However when I fix one block and I impose a displacement for the other one (Bounday Conditions), I can't complete my analysis with Abaqus, which fails exactly when the most solicited part of the bonding gets damaged. What should I do? Am I using a correct procedure for my problem or should I try something else like a user subroutine?
Thank you very much.





RE: Cohesive bond
RE: Cohesive bond
RE: Cohesive bond
The convergence difficulties using cohesive elements in Abaqus is a well known and shared frustration among FEA users...so rest assured that you are not doing anything incorrectly.
There is a new product coming out in March/April from Firehole Composites that provides an add-on to Abaqus that significantly aids in the convergence of using cohesive elements to model damage evolution.
Contact me at milligand@firehole.com if you are interested in staying informed of the progress.
Regards,
-Dan
Dan Milligan
Firehole Composites (www.firehole.com)
FHC provides software and consulting for analysis of composite structures.