Coupling Shell/Sold elements
Coupling Shell/Sold elements
(OP)
Hi all,
I am using Ansys classic to model the mecanical behavour of a membrane. The assembly is composed by a strongback (it looks like a square mesh), in this part, a thick film of polymer is glue and a pressure is applied.
So to model with Ansys the mechanical behavour, I use solid element for the strongback and shell element for the membrane. My problem is to model the contact between the membrane and the strongback. I would like to know if it is better to use the CP command or the contact wizard?
The aim of this study is to know the influence of stiffness of the strongback.
Thank you for your help
I am using Ansys classic to model the mecanical behavour of a membrane. The assembly is composed by a strongback (it looks like a square mesh), in this part, a thick film of polymer is glue and a pressure is applied.
So to model with Ansys the mechanical behavour, I use solid element for the strongback and shell element for the membrane. My problem is to model the contact between the membrane and the strongback. I would like to know if it is better to use the CP command or the contact wizard?
The aim of this study is to know the influence of stiffness of the strongback.
Thank you for your help





RE: Coupling Shell/Sold elements
1. No contacts and no cp's. Just Mesh the area with shels and then the volume with tets
2. Contact elements with friction
Then compare the results. I assume that the first variant will give similar results with variant 2.
Regards,
Alex
RE: Coupling Shell/Sold elements
Hope this helps,
Doug
RE: Coupling Shell/Sold elements
This is my apdl file with a simple geometry and with no contacts and CP's, it probably help you to understand my problem.
Regards,
FINI
/CLEAR
/TITLE,
/PREP7
!______________________________________________________________
!!!!Parametres
*SET,e,0.003
*SET,em,0.000015
*SET,p,350000
*SET,a,0.052
*SET,l,0.003
*SET,b,0.005
!______________________________________________________________
!------------------------------------------!
! MATERIAU 1=PP Pa !
!------------------------------------------!
!MATERIAU 1=316LN Pa
UIMP,1,EX, , ,193E9,
UIMP,1,DENS, , ,8000,
UIMP,1,NUXY, , ,0.272,
ET,1,solid95
!MATERIAU 2=Film PP
UIMP,2,EX, , ,100E9,
UIMP,2,DENS, , ,8000,
UIMP,2,NUXY, , ,0.49,
ET,2,SHELL93
R,2,em, , , , , , !epaisseur membrane
!------------------------------------------!
! Geometry !
!------------------------------------------!
RECTNG,a/2-e/2,a/2+e/2,0,a,
RECTNG,0,a,a/2-e/2,a/2+e/2,
AADD,1,2
VOFFST,3,b,,
RECTNG,0,a,0,a,
ESIZE,e,0,
MSHAPE,1,3D
MSHKEY,0
VSWEEP,1
AATT,2,2,2,0,
*DO,i,0,3
LESIZE,37+i,,,19,
*ENDDO
MSHAPE,0,2D
MSHKEY,0
AMESH,15
!------------------------------------------!
! Loads !
!------------------------------------------!
SFA,15,,PRES,(100000),,
*DO,i,0,3
DL,37+i,15,ALL,0,0
*ENDDO
*DO,i,0,3
DA,4+3*i,ALL,,
*ENDDO
FINISH
/SOL
!NLGEOM,ON
SOLVE
FINISH
RE: Coupling Shell/Sold elements
CODE
/CLEAR
/TITLE,
/PREP7
!______________________________________________________________
!!!!Parametres
*SET,e,0.003
*SET,em,0.000015
*SET,p,350000
*SET,a,0.052
*SET,l,0.003
*SET,b,0.005
!______________________________________________________________
!------------------------------------------!
! MATERIAU 1=PP Pa !
!------------------------------------------!
!MATERIAU 1=316LN Pa
UIMP,1,EX, , ,193E9,
UIMP,1,DENS, , ,8000,
UIMP,1,NUXY, , ,0.272,
ET,1,solid95
!MATERIAU 2=Film PP
UIMP,2,EX, , ,100E9,
UIMP,2,DENS, , ,8000,
UIMP,2,NUXY, , ,0.49,
ET,2,SHELL93
R,2,em, , , , , , !epaisseur membrane
!------------------------------------------!
! Geometry !
!------------------------------------------!
RECTNG,a/2-e/2,a/2+e/2,0,a,
RECTNG,0,a,a/2-e/2,a/2+e/2,
AADD,1,2
VOFFST,3,b,,
! changed:
RECTNG,0,a/2-e/2,0,a/2-e/2
RECTNG,a/2+e/2,a,a/2+e/2,a
RECTNG,0,a/2-e/2,a/2+e/2,a
RECTNG,a/2+e/2,a,0,a/2-e/2
nummrg,kp
MSHAPE,0,2D
MSHKEY,0
asel,s,loc,z,0
AATT,2,2,2,0,
esize,e
AMESH,all
alls
ESIZE,e,0,
MSHAPE,1,3D
MSHKEY,0
VSWEEP,1
! :changed
RE: Coupling Shell/Sold elements
And now if I want to model the global displacement of the strongback, I must to use the CP's?
RE: Coupling Shell/Sold elements
Regards,
Alex
RE: Coupling Shell/Sold elements
Thank you for your help Alex !
Cheers