August 11, 2023 at 11:37 am
Fraser Shields
Subscriber

Hi Ashish,

Thanks for getting back to me.

Yes I attempted to use the suggested command in my /prep7 command snippet:

!   Commands inserted into this file will be executed just prior to the ANSYS SOLVE command.
!   These commands may supersede command settings set by Workbench.

!   Active UNIT system in Workbench when this object was created:  Metric (um, kg, uN, s, V, mA)
!   NOTE:  Any data that requires units (such as mass) is assumed to be in the consistent solver unit system.
!                See Solving Units in the help system for more information.

/PREP7

! Define an element type with the desired real constant (CPT216)
ET, 9991, CPT216
! Set element key option to Structural-pore-fluid-diffusion loading
KEYOPT, 9991, 12, 1
! Select the solid elements you want to modify (SOLID186)
ESEL, S, TYPE,, 13, 57
! Modify the selected elements to use the specified element type (9991)
EMODIF, ALL, TYPE, 9991

ESEL, NONE

! Define proelastic material for solid elements
MP,EX,99999,0.001 ! YOUNG'S MODULUS
MP,NUXY,99999,0.3 ! POISSON'S RATIO
FPX=1e6 ! PERMEABILITY
ALPHA=1 ! BIOT coeffient
TB, PM, 99999,,,PERM
TBDATA,1,FPX,FPX,FPX
TB,PM,99999,,,BIOT ! BIOT COEFFICIENT
TBDATA,1,ALPHA, KM
ESEL, NONE

! Define linear elastic material for shell elements 
MP,EX,88888,300 ! YOUNG'S MODULUS
MP,NUXY,88888,0.3 ! POISSON'S RATIO

ALLSEL, ALL

! Select the solid elements you want to modify and assign material 1
ESEL, S, TYPE,, 9991
MPCHG, 99999, ALL

ALLSEL, ALL

! Select the shell elements you want to modify and assign material 2
ESEL, S, TYPE,, 1, 12
MPCHG, 88888, ALL

ALLSEL, ALL

! impervious (fluid flow flux=0)
NSEL,S,LOC,Y,1000 ! select top surface nodes
NSEL,A,LOC,Y,0   ! select bottom surface nodes
SF,ALL,FFLX,0    ! Set surface force (fluid flow flux) to zero

ALLSEL, ALL

! permeable (fluid pressure=0) on sides of cylinder to allow fluid flow
CSYS, 5  ! change coordinate system to cylindrical with cartesian y as axis of rotation
NSEL,S,LOC,X,3250  ! select nodes at radius=3250um
D,ALL,PRES,0  ! set fluid pressure to zero 

ALLSEL, ALL

CSYS, 0  ! change coordinate system back to global coordinates

! Select all elements
ALLSEL, ALL

RESCONTROL, LINEAR 
/SOLU

However, I still get the same error.

Within the static structural solver output, I get the following message:

For some reason, the solver isn't creating any multiframe restart files due to my elements being couples pore diffusion CP216?