Dear all,
I am performing contact analysis for predicting the debonding mechanism between the matrix and the inclusion by using bilinear traction separation cohesive surface method. This cohesive interaction law has been defined at the contact pair algorithm. The simulation has been done based on force control to mimic the experimental behavior but unfortunately the solution is not converging for the given pressure load due to the penetration of nodes at the contact surface. For example, I am getting the following message :
MAX. PENETRATION ERROR 3.78373E-09 AT NODE PART-1-1.84060 OF CONTACT PAIR
(ASSEMBLY_SF_ALUMINA1_WITH_CHROMIUM2,ASSEMBLY_SF_CHROMIUM2_WITH_ALUMINA1)
MAX. CONTACT FORCE ERROR -5.92270E-06 AT NODE PART-1-1.112878 OF CONTACT
PAIR
(ASSEMBLY_SF_ALUMINA1_WITH_CHROMIUM2,ASSEMBLY_SF_CHROMIUM2_WITH_ALUMINA1)
THE CONTACT CONSTRAINT ERRORS ARE WITHIN THE TOLERANCES.
If any one know how avoid this penetration issue kindly let me know.
Thank you
Dear Pichai Pandi
Read The paper:
Katsikadelis J.T. and Kokkinos F.T. (1993). Analysis of Composite Shear Walls with Interface Separation, Friction and Slip Using BEM. International Journal of Solids and Structures, 30 (13), pp. 1825-1848.
It may help you
With kind gards
John T. Katsikadelis
Are you using abaqus? You should apply an interaction model. One you have activated the general contact or the surf-to-surf contact, be sure that the master surface is bigger than the slave. The master surface should also have a finer mesh.
Franco
Yes I am using abaqus, where I am defining cohesive damage behavior at the interaction module to simulate debonding mechanism but in my model the element size are fixed because it has been generated from SCAN IP software .
Dear Franco,
Thanks for your answer. but also in this case the master surface could penetrate into the slave surface. how do you prevent it?
add an inverse/reverse master-slave(Master-B, Sl-A) interaction to the original slave-master config(Master-A, Sl-B)
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