Viewing open tiebreak contact

[Omar Shawa]

Hi All,

Is there any way to visualize which Tiebreak contacts failed during an analysis?

(something equivalent to visualizing the cracks in a Winfrith MAT084/MAT085 material).

I appreciate any help you can provide.

Omar

[James M. Kennedy]

Dear Omar,

 

These notes are perhaps somewhat old.

 

-------------------------------

 

examples

 

The visualization of delamination via "contact gap" (*DATABASE_INTFOR) shows

a damage value ranging from 0 (tied, no damage) to 1 (released, full damage) for

OPTION= 6, 7, and 9 (contact between solids and thick shells):

http://ftp.lstc.com/anonymous/outgoing/jday/dcb_solids.dyn

 

The visualization of delamination via "contact gap" (*DATABASE_INTFOR) shows

a damage value ranging from 0 (tied, no damage) to 1 (released, full damage) for

OPTION= 8, 10, and 11 (contact between shells):

http://ftp.lstc.com/anonymous/outgoing/jday/dcb_shells.dyn

 

-------------------------------

 

In the simulation model the additional interface force file INTFOR can be

written out, requested by a respective command in the LS-DYNA execution

line (s=INTFOR).

 

*DATABASE_BINARY_OPTION

 

INTFOR - Contact interface database. Its file name must be given on the

execution line using "s=". Also see *CONTACT variables SPR and MPR.

 

*DATABASE_EXTENT_INTOR

The following card controls to some extent the content of the optional intfor

binary database. See also *DATABASE_BINARY_INTFOR. The intfor
database contains geometry and time history data pertaining to those contact

surfaces which are flagged in *CONTACT with the variables SPR and/or MPR.

The name of the intfor database must be given on the execution line via

"s=filename".

 

-----------------------------

 

For example, this file includes the contact gap data, which can be used for

the visualization of the  delamination contact in LS-Prepost (Fcomp -> Nodal

-> Contact gap). Once the delamination contact fails completely and CCRIT

is reached,  the respective nodal value changes from 1 to 0, which can be
visualized in a two-colored fringe plot.

 

-----------------------------

Sincerely,
James M. Kennedy
KBS2 Inc.
August 31, 2022

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[James M. Kennedy]

Dear Omar,

 

Some additional notes:

 

https://www.youtube.com/watch?v=HeTbcOf6S40

 

https://ftp.lstc.com/anonymous/outgoing/jday/composites/delamination_public

 

Sincerely,

James M. Kennedy

KBS2 Inc.

August 31, 2022

 

To view this discussion on the web visit https://groups.google.com/d/msgid/ls-dyna2/001f01d8bd49%2476fbb7e0%2464f327a0%24%40kbs2.com.