How to carry out nonlinear iterative contact subroutine in SOL101 only on subset of subcases if possible?

Question

I want to run contact subroutine in a linear elastic SOL101 and therefore defined the cards

1xBCONPRG with ICOORD=1 (Stress free Initial state), ISEARCH=1 (Search only from Slave to Master) 
 2x BCBODY1, both 3D and Deformable 
 2x BCPROP 
 1x BCONECT assigning slave and master and referencing the Parameter set 
 1x BCTABL1 with ID=99 referencing a single BCONECT

As I want to run contact subroutine only on a subset of the subcases, I set BCONTACT=99 on the subcases that should iterate out the contact and BCONTACT=NONE on all other subcases.

The nonlinear Iteration is still carried out for each subcase.

Is it possible to run the nonlinear subroutine only for certain subcases 
 If yes, how to set the Parameters to do so?

karlR · Accepted Answer

I doubt that this is possible at all.

I use this: No NLSTEP in SC1: Default 10 inc, NLSTEP with lcnt in SC2: 1 inc

Still nonlinear, but with a minimum of iterations.

SUBCASE 1

$ Subcase name : Default

SUBTITLE=Default

$ NLSTEP = 1

BCONTACT = 1

SPC = 2

LOAD = 3

SUBCASE 2

$ Subcase name : Default

SUBTITLE=Default

NLSTEP = 1

BCONTACT = 1

SPC = 2

LOAD = 3

DISPLACEMENT(PLOT,SORT1,REAL)=ALL

$ SPCFORCES(PLOT,SORT1,REAL)=ALL

$ STRESS(PLOT,SORT1,REAL,VONMISES,BILIN)=ALL

BEGIN BULK

PARAM PRTMAXIM YES

BCPARA ,0

,NLGLUE,0

,FTYPE,6

,METHOD,segtoseg

,ERRBAS,1 $ Pair Contact Tolerance, Prio 2

,ERROR,.01 $ Global Contact Tolerance, Prio 3

$

NLSTEP,1

,lcnt,1

STS:

subcase inc cycl sepa cut cycl

/step # # # # # #

1 |--of the inc--|--------

0 0 0 0 0 0

0 1 3 0 0 3

0 2 2 0 0 5

0 3 2 0 0 7

0 4 2 0 0 9

0 5 2 0 0 11

0 6 2 0 0 13

0 7 2 0 0 15

0 8 2 0 0 17

0 9 2 0 0 19

0 10 2 0 0 21

subcase inc cycl sepa cut cycl

/step # # # # # #

2 |--of the inc--|--------

0 0 0 0 0 0

0 1 4 0 0 4