Hi Arunachalam Muthukaruppan 

I didnt get you well. Could you explain more. Maybe I can help.

Best Lucks

Hi khaled,

1.  I have a bio polymer material and i'm using cohesive elements to model my material and to describe the behavior of my material i'm using a bi-linear cohesive law.

2. Then i'm conducting a uniform tension test on my specimen and I'm able to run my simulations successfully

3.   But I found that many cohesive elements in my material are undergoing negative displacements (i.e they are bending) which is not permissible for my analysis .

Hence, in order to avoid negative displacement in my cohesive elements i have to impose a another cohesive law( which is compressive in nature),so that when my cohesive elements undergoes negative displacement the second cohesive law will prevent that from happening.

I want to know how to implement this in Abaqus

Cohesive elements can take mode I compression loads. But no failure happens under mode I compressive load.

There are two ways to implement in Abaqus

Hi Umesh thanks for your answer. 

My problem exactly  is that the cohesive elements are getting crushed so does cohesive interaction instead of elements solve this issue?

I also see that cohesive Interactions are used only for Debonding problems Is it true?? or we can use them for other applications too.