How to tie two bodies through the steps?

[Me09]

Guys
I want to tie two bodies after a contact? the bodies should move together after the contact.
I need to define the "tie" in the second step. any idea?

 

[corus]

There's an option to tie once they have made contact.

corus

 

[Me09]

as far as I know there is an option in "contact property" which says about allowing separation after contact. does that tie the bodies?

 

[xerf]

*SURFACE BEHAVIOR, NO SEPARATION
+ Rough friction

But this does not constrain the rotational DOFS if you use shell elements.

There is also a feature called TIED contact.

*CONTACT PAIR, TIED

Commonly, contact pairs can be activated/deactivated with *MODEL CHANGE, type=contact pair, but I never tried with tied contact surfaces.

 

[mrgoldthorpe]

** Define your contact pairs first
**
*STEP
Step 1
** remove them for your first step
*MODEL CHANGE, REMOVE , TYPE = CONTACT PAIR
SURF1 , SURF2
**....
**....
*END STEP
**
*STEP
Step 2
** bring them back in the second step
*MODEL CHANGE, ADD , TYPE = CONTACT PAIR
SURF1 , SURF2
**....
**....
*END STEP
**
Step 3
** use them in the 3rd
**....
**....
*END STEP

 

[Me09]

Thanks for all the responds.
I have tried those but not working. it says removing contact surface is "not exist in explicit"

Let me explain my problem again I have two body; the main body (B1) is imported from other software (orphan mesh, solid element).
Second body (B2) created in abaqus and has a simple shape (solid element).
B1 should hit B2 then B1+B2 rotate together.
In step1 B1 and B2 contact each other with no error. As soon as B1+B2 wants to rotate the program stop with an error.
I am working in explicit 6.7.

 

[amubashar]

Hi,

Have you tried using cohesive surfaces. These can be used to model sticky contact i.e., surfaces or parts of surfaces that are not initially in contact may bond on coming into contact. (Ref Abaqus analysis user's manual, section 31.1.10)


Aamir

 

[Me09]

the cohesive element does not give correct answer as the behaviour should not be sticky, any way thanks for your respond.

however if there is not a way to tie two bodies after the initial step, how about finishing the step and call the result in a fresh model? I mean if I firstly contact parts B1 and B2 and get B1+B2 result then call B1+B2 in a new model and rotate it? does it work? any suggestion for this?