Hyperelastic material behaviour

[hexa2016]

Hi all,

I tried to learn on hyperelastic material, but at first with thk of 10mm, i can only apply 20mm displacement for convergence, otherwise it wont converge...then i change the thickness to 30mm, the behaviour also same..it can only been applie for ux displacement up to 20mm.

my script;

FINISH
/OUTPUT,contact-st-rb,out
/CLEAR
/UNITS,MPA
/PREP7

ET,1,SOLID185


!STEEL
MP,EX,1,210000
MP,PRXY,1,0.3


!RUBBER

TB,HYPE,2,1,3,OGDE
TBTEMP,0
TBDATA,,1.89e6,1.3,3600,5,-30000,-2
TBDATA,,,,,,,
TB,PRONY,2,1,2,SHEAR
TBTEMP,0
TBDATA,,0.3333,0.4,0.3333,0.2,,

!MODELLING

BLOCK,,50,,30,,50,
BLOCK,30,80,30,60,,50,
BLOCK,,50,60,90,,50,


!APPLY VATT TO STEEL

VSEL,S,VOLU,,1
VSEL,A,VOLU,,3
VATT, 1, , 1, 0

ALLSEL


!APPLY VATT TO RUBBER

VSEL,S,VOLU,,2
VATT,2,1,1,0

VATT, 2, , 1, 0

ALLSEL


!Model meshing

ESIZE, 6
VMESH,ALL


R,3
REAL,3
!Generate target surface



ET,2,170 !TARGE170 ELEMENT
ASEL,S,AREA,,4
CM,TARGET,AREA
NSLA,S,1
ESLN,S,0
TYPE,2
ESURF


!Generate contact surface

ALLSEL
ET,3,174 !CONTA174 ELEMENT
KEYOPT,3,2,2 !CONTACT ALGORITHM-MPC APPROACH
KEYOPT,3,4,2 !LOCATION OF DETECTION POINT -ON NODAL POINT NORMAL FROM CONTACT SURFACE-RIGID SURFACE CONSTRAINT
KEYOPT,3,12,5 !BEHAVIOUR CONTACT SURFACE - BONDED ALWAYS
ASEL,S,AREA,,9
CM,CONTACT,AREA
NSLA,S,1 !SELECTS THE NODES ATTACHED TO THE AREA
ESLN,S,0 !SELECTS THOSE ELEMENTS ATTACHED TO THE SELECTED NODES
TYPE,3
ESURF

ALLSEL


R,4
REAL,4
!Generate target surface

ET,4,170 !TARGE170 ELEMENT
ASEL,S,AREA,,10
CM,TARGET,AREA
NSLA,S,1
ESLN,S,0
TYPE,4
ESURF


!Generate contact surface

ALLSEL
ET,5,174 !CONTA174 ELEMENT
KEYOPT,5,2,2 !CONTACT ALGORITHM-MPC APPROACH
KEYOPT,5,4,2 !LOCATION OF DETECTION POINT -ON NODAL POINT NORMAL FROM CONTACT SURFACE-RIGID SURFACE CONSTRAINT
KEYOPT,5,12,5 !BEHAVIOUR CONTACT SURFACE - BONDED ALWAYS
ASEL,S,AREA,,15
CM,CONTACT,AREA
NSLA,S,1 !SELECTS THE NODES ATTACHED TO THE AREA
ESLN,S,0 !SELECTS THOSE ELEMENTS ATTACHED TO THE SELECTED NODES
TYPE,5
ESURF

ALLSEL
FINISH

/SOL
ANTYPE,0
NLGEOM,1
SOLCONTROL,ON
NSUBST,10,10
OUTRES,ALL,ALL
TIME,1

DA,5,ALL
DA,17,ALL

ALLSEL

ASEL,S,AREA,,12
DA,ALL,UX,20

ALLSEL

SOLVE
FINISH


what should i do for higher displacement in ux?

thanks