July 27, 2023 at 11:25 amFraser ShieldsSubscriber
I'm trying to setup a biphasic analysis of a solid hydrogel reinforced with thermoplastic shell (sandwiched between the solid parts). I have run the initial solution with SOLID186 elements for the hydrogel and shell 281 elements for the shell. I want to use ADPL command snippets within the static structural tab in ANSYS mechanical. However, I am a bit stuck. I am trying to get model the fluid pressure in the hydrogel parts when the construct is placed under a compressive displacement of 20% strain.
I have tried the following command snippet with no success:/PREP7ET,9991,CPT216ESEL, S, SOLID186EMODIF, ALL, TYPE, 9991/SOLUAny help would be much appreciated,Thanks
July 28, 2023 at 10:51 amRahul KumbharAnsys Employee
It seems ESEL command is wrong. It should be like: ESEL,S,ENAME, ,186
July 28, 2023 at 3:01 pmDave LoomanAnsys Employee
Also, add ALLSEL command after EMODIF.
July 31, 2023 at 5:36 pmFraser ShieldsSubscriber
Thanks for the help, I've managed to improve my script slightly, however I am now running into an error "Element type 216 requires the definition of TB,PM with the activation of pressure DOF (KEYOPT(12)). ". My script is as follows:/PREP7! Define an element type with the desired real constant (CPT216)ET, 9991, CPT216! 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! Define proelastic material for solid elementsMP,EX,1,0.001 ! YOUNG'S MODULUSMP,NUXY,1,0.0 ! POISSON'S RATIOFPX=0.5 ! PERMEABILITYONE=1.0TB,PM,1,,,PERMTBDATA,1,FPX,FPX,FPXTB,PM,1,,,BIOT ! BIOT COEFFICIENTTBDATA,1,ONE! Define linear elastic material for shell elementsMP,EX,2,0.1 ! YOUNG'S MODULUSMP,NUXY,2,0.0 ! POISSON'S RATIO! Select the solid elements you want to modify and assign material 1ESEL, S, TYPE,, 9991MPCHG, 1, ALL! Select the shell elements you want to modify and assign material 2ESEL, S, TYPE,, 1, 12MPCHG, 2, ALL! Select all elementsESEL, ALL! Continue with the solution phase/SOLU
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