Hello,

I am simulating crack propagation with cohesive elements. In order to verify that my model is working correctly I wanted to compare it to some real world data or benchmark examples. One such example is in the Abaqus Benchmarks manual - a flat plate with a crack in the center.

Dear Abaqus Users,

    When modeling Composite structures,I got a difficulty in giving the properties of Traction, can some one expalin me

E/knn, 1/kss, G2/ktt

How can we determine the values of Knn,ktt,Kss

Thanks

Rajesh

Fachhochschule Jena

Hi,
I am working on effects of Blast Loading in sandwich composites using Abaqus. I want to incorporate Cohesive behaviour at the interface of the two materials in the sandwich composite structure i am analysing.

 When I specify the interaction proporty as a cohesive bahaviour(if i dont intend to use thedefault parameters given by Abaqus), I am supposed to input whether its coupled interaction or uncoupled interaction and inpur the relevant values of Knn, Ktt, Kss etc. As of now, I am not able to find any standard literature values available for these contants on the internet. So I've been using the defaults given by Abaqus.

Can anyone please suggest material for Cohesive Failure Model. I need to know the basic concepts that deals with cohesive failure model. I would also like to know how deltanc, deltatc etc are formulated in this model. Please sugggest.