Wear in abaqus

[Iman@123]

How can I use the wear interaction property? should the two bodies in contact be deformable?
and what does this error mean? "THESE CHARACTERS DO NOT CONVERT TO FLOATING POINT VALUE"
I'm using abaqus 2025

 

[FEA way]

Check the documentation chapter Interactions --> Contact Property Models --> Mechanical Contact Properties --> Contact Wear. You can have one rigid body.

Regarding the error, did you use a comma instead of a dot as a decimal separator ?

 

[Iman@123]

Check the documentation chapter Interactions --> Contact Property Models --> Mechanical Contact Properties --> Contact Wear. You can have one rigid body.

Regarding the error, did you use a comma instead of a dot as a decimal separator ?

I did not edit the keyword; that's why I don't know what is the problem.
but in the .inp file, the error came after these:


***NOTE: OUTPUT REQUEST DAMAGEC IS NOT AVAILABLE FOR THE MATERIAL L80


***NOTE: OUTPUT REQUEST DAMAGEC IS NOT AVAILABLE FOR THE MATERIAL S7


***NOTE: OUTPUT REQUEST DMICRT IS NOT AVAILABLE FOR THE MATERIAL S7


***NOTE: OUTPUT REQUEST SDEG IS NOT AVAILABLE FOR THE MATERIAL S7*surface, type=ELEMENT, name=ASSEMBLY_SURF-1*surface, type=ELEMENT, name=ASSEMBLY_SURF-2*surface, type=ELEMENT, name=ASSEMBLY_TJ*surface, type=ELEMENT, name=ASSEMBLY__PICKEDSURF12*surface, type=NODE, name=ASSEMBLY_PART-3-1_CASINGSET_CNS_*surfaceinteraction, name=CONTACT*friction*surfacebehavior, pressure-overclosure=HARD*surfaceproperty, name=WEAR*wearsurfaceproperties, friccoefdependent=YES, unitlesswearcoef=NO


***ERROR: THESE CHARACTERS DO NOT CONVERT TO FLOATING POINT VALUELINE IMAGE: 1.248e-08, , 1e-09, , ***boundary*boundary, type=VELOCITY*step, name=Step-1, nlgeom=YES*dynamic, explicit*boundary, op=NEW


***WARNING: THE OPTION *BOUNDARY,TYPE=DISPLACEMENT HAS BEEN USED; CHECK STATUSFILE BETWEEN STEPS FOR WARNINGS ON ANY JUMPS PRESCRIBED ACROSS THESTEPS IN DISPLACEMENT VALUES OF TRANSLATIONAL DOF. FOR ROTATIONALDOF MAKE SURE THAT THERE ARE NO SUCH JUMPS. ALL JUMPS INDISPLACEMENTS ACROSS STEPS ARE IGNORED*boundary, op=NEW, type=VELOCITY*cload, amplitude=AMP-1*contactpair, interaction=CONTACT, mechanicalconstraint=KINEMATIC, cpset=INT-3*endstep

 

[FEA way]

Can you share the .inp file (you can reduce the model to the minimum necessary to reproduce the issue) ?

 

[Iman@123]

Can you share the .inp file (you can reduce the model to the minimum necessary to reproduce the issue) ?

PROCESSING PART, INSTANCE, AND ASSEMBLY INFORMATION
*******************************************************


END PROCESSING PART, INSTANCE, AND ASSEMBLY INFORMATION
***********************************************************




OPTIONS BEING PROCESSED
***************************


*Element, type=C3D8R
*Elset, elset=ASSEMBLY_PART-3-1_SET-2
*Element, type=C3D8R
*Elset, elset=ASSEMBLY_PART-4-1_SET-2
*Elset, elset=ASSEMBLY_B_SET-9
*Elset, elset=ASSEMBLY_CASCONT
*Elset, elset=ASSEMBLY_LOWERCAS
*Elset, elset=ASSEMBLY__PICKEDSET14
*Elset, elset=ASSEMBLY__SURF-1_S3
*Elset, elset=ASSEMBLY__SURF-1_S4
*Elset, elset=ASSEMBLY__SURF-1_S5
*Elset, elset=ASSEMBLY__SURF-1_S6
*Elset, elset=ASSEMBLY__SURF-2_S3
*Elset, elset=ASSEMBLY__SURF-2_S4
*Elset, elset=ASSEMBLY__SURF-2_S5
*Elset, elset=ASSEMBLY__SURF-2_S6
*Elset, elset=ASSEMBLY__TJ_S3
*Elset, elset=ASSEMBLY__TJ_S4
*Elset, elset=ASSEMBLY__TJ_S5
*Elset, elset=ASSEMBLY__TJ_S6
*Elset, elset=ASSEMBLY___PICKEDSURF12_S1
*Elset, elset=ASSEMBLY___PICKEDSURF12_S2
*Elset, elset=ASSEMBLY___PICKEDSURF12_S3
*Elset, elset=ASSEMBLY___PICKEDSURF12_S4
*Elset, elset=ASSEMBLY___PICKEDSURF12_S5
*Elset, elset=ASSEMBLY___PICKEDSURF12_S6
*heading
*material, name=L80
*damageinitiation, criterion=DUCTILE
*damageevolution, type=DISPLACEMENT
*density
*elastic
*plastic
*material, name=S7
*density
*elastic
*solidsection, elset=ASSEMBLY_PART-3-1_SET-2, controls=EC-1, material=L80
*solidsection, elset=ASSEMBLY_PART-4-1_SET-2, controls=EC-2, material=S7
*sectioncontrols, name=EC-1, elementdeletion=YES
*sectioncontrols, name=EC-2, elementdeletion=NO
*solidsection, elset=ASSEMBLY_PART-3-1_SET-2, controls=EC-1, material=L80
*solidsection, elset=ASSEMBLY_PART-4-1_SET-2, controls=EC-2, material=S7
*rigidbody, refnode=ASSEMBLY__PICKEDSET58, elset=ASSEMBLY_B_SET-9
*rigidbody, refnode=ASSEMBLY__PICKEDSET58, elset=ASSEMBLY_B_SET-9
*rigidbody, refnode=ASSEMBLY__PICKEDSET58, elset=ASSEMBLY_B_SET-9
*rigidbody, refnode=ASSEMBLY__PICKEDSET58, elset=ASSEMBLY_B_SET-9
*surface, type=ELEMENT, name=ASSEMBLY_SURF-1
*surface, type=ELEMENT, name=ASSEMBLY_SURF-2
*surface, type=ELEMENT, name=ASSEMBLY_TJ
*surface, type=ELEMENT, name=ASSEMBLY__PICKEDSURF12
*surface, type=NODE, name=ASSEMBLY_PART-3-1_CASINGSET_CNS_
*surface, type=ELEMENT, name=ASSEMBLY_SURF-1
*surface, type=ELEMENT, name=ASSEMBLY_SURF-2
*surface, type=ELEMENT, name=ASSEMBLY_TJ
*surface, type=ELEMENT, name=ASSEMBLY__PICKEDSURF12
*surface, type=NODE, name=ASSEMBLY_PART-3-1_CASINGSET_CNS_
*rigidbody, refnode=ASSEMBLY__PICKEDSET58, elset=ASSEMBLY_B_SET-9
*surfaceinteraction, name=CONTACT
*friction
*surfaceproperty, name=WEAR
*wearsurfaceproperties, friccoefdependent=YES, unitlesswearcoef=NO

***ERROR: THESE CHARACTERS DO NOT CONVERT TO FLOATING POINT VALUE
LINE IMAGE: 1.248e-08, , , , **
***NOTE: DUE TO AN INPUT ERROR THE ANALYSIS PRE-PROCESSOR HAS BEEN UNABLE TO
INTERPRET SOME DATA. SUBSEQUENT ERRORS MAY BE CAUSED BY THIS OMISSION
*rigidbody, refnode=ASSEMBLY__PICKEDSET58, elset=ASSEMBLY_B_SET-9
*rigidbody, refnode=ASSEMBLY__PICKEDSET58, elset=ASSEMBLY_B_SET-9
*boundary
*boundary, type=VELOCITY
*boundary, op=NEW
*boundary, op=NEW, type=VELOCITY
*solidsection, elset=ASSEMBLY_PART-3-1_SET-2, controls=EC-1, material=L80
*solidsection, elset=ASSEMBLY_PART-4-1_SET-2, controls=EC-2, material=S7
*rigidbody, refnode=ASSEMBLY__PICKEDSET58, elset=ASSEMBLY_B_SET-9
*friction
*elementoutput, directions=YES
*output, field
*output, history, variable=PRESELECT
*step, name=Step-1, nlgeom=YES
*step, name=Step-1, nlgeom=YES
*dynamic, explicit
*boundary, op=NEW
*boundary, op=NEW, type=VELOCITY
*adaptivemeshcontrols, name=ADA-1
*output, field
*nodeoutput
*elementoutput, directions=YES
*contactoutput, variable=PRESELECT
*output, history, variable=PRESELECT
*endstep

***WARNING: INTEGRATION AND SECTION POINT OUTPUT VARIABLES WILL NOT BE OUTPUT
FOR DEFORMABLE ELEMENTS THAT ARE DECLARED AS RIGID USING THE
*RIGID BODY OPTION

***NOTE: OUTPUT REQUEST DAMAGEC IS NOT AVAILABLE FOR THE MATERIAL L80
*surface, type=ELEMENT, name=ASSEMBLY_SURF-1
*surface, type=ELEMENT, name=ASSEMBLY_SURF-2
*surface, type=ELEMENT, name=ASSEMBLY_TJ
*surface, type=ELEMENT, name=ASSEMBLY__PICKEDSURF12
*surface, type=NODE, name=ASSEMBLY_PART-3-1_CASINGSET_CNS_
*surfaceinteraction, name=CONTACT
*friction
*surfacebehavior, pressure-overclosure=HARD
*surfaceproperty, name=WEAR
*wearsurfaceproperties, friccoefdependent=YES, unitlesswearcoef=NO

***ERROR: THESE CHARACTERS DO NOT CONVERT TO FLOATING POINT VALUE
LINE IMAGE: 1.248e-08, , , , **
*boundary
*boundary, type=VELOCITY
*step, name=Step-1, nlgeom=YES
*dynamic, explicit
*boundary, op=NEW

***WARNING: THE OPTION *BOUNDARY,TYPE=DISPLACEMENT HAS BEEN USED; CHECK STATUS
FILE BETWEEN STEPS FOR WARNINGS ON ANY JUMPS PRESCRIBED ACROSS THE
STEPS IN DISPLACEMENT VALUES OF TRANSLATIONAL DOF. FOR ROTATIONAL
DOF MAKE SURE THAT THERE ARE NO SUCH JUMPS. ALL JUMPS IN
DISPLACEMENTS ACROSS STEPS ARE IGNORED
*boundary, op=NEW, type=VELOCITY
*cload, amplitude=AMP-1
*contactpair, interaction=CONTACT, mechanicalconstraint=KINEMATIC, cpset=INT-3
*endstep



P R O B L E M S I Z E


NUMBER OF ELEMENTS IS 1665
NUMBER OF NODES IS 3821
NUMBER OF NODES DEFINED BY THE USER 3821
TOTAL NUMBER OF VARIABLES IN THE MODEL 11466
(DEGREES OF FREEDOM PLUS MAX NO. OF ANY LAGRANGE MULTIPLIER
VARIABLES. INCLUDE *PRINT,SOLVE=YES TO GET THE ACTUAL NUMBER.)





THE PROGRAM HAS DISCOVERED 2 FATAL ERRORS

** EXECUTION IS TERMINATED **



END OF USER INPUT PROCESSING



JOB TIME SUMMARY
USER TIME (SEC) = 0.80
SYSTEM TIME (SEC) = 0.50
TOTAL CPU TIME (SEC) = 1.3
WALLCLOCK TIME (SEC) = 1

 

[FEA way]

I meant the .inp file (not .dat) but it doesn't have to be the whole file. You can attach some small segment of it since the problem is with this part:

*wearsurfaceproperties, friccoefdependent=YES, unitlesswearcoef=NO

***ERROR: THESE CHARACTERS DO NOT CONVERT TO FLOATING POINT VALUE
LINE IMAGE: 1.248e-08, , , , **

But if it looks like this in the input file then it should be ok:

*wearsurfaceproperties, friccoefdependent=YES, unitlesswearcoef=NO
1.248e-08, , , ,

Maybe there's some unnecessary space or something like that.

 

[Iman@123]

Do I have to use a user subroutine with the built-in wear contact?
and what are the probable causes for zero plastic strain?

 

[FEA way]

No, user subroutine is not necessary for that anymore in Abaqus 2025.

Compare the stress level in the analysis with your plasticity model definition. Maybe the stresses are too low to reach plastic deformation.

 

[Rama27]

Hello. I'm also trying to model wear in a pin-on-disc contact, but I've been using the UMESHMOTION subroutine.
How has your experience been with Abaqus 2025?
Thanks.