Penetration problem

[OkapiEng]

Hi everybody
My name is Okapi and i'm new on this forum.
My english is not perfect, because i'm not native speaker...

I have a probleme to analyse a not penetration surface

Please, look the programme and modify the programme to have not penetration surface (i looked with TARGE170 et CONTA but i'dont do that)


thank you

!*************************************
! Penetration problem
!*************************************


fini
/clear

/title,toto

/gra,full
/vie,,-1,-1,1
/vup,,z
/type,,4
/prep7

/num,1
tnum,1

btol,1e-5
epsi=1e-4

!Définition du fichier de plots de sortie
!----------------------------------------

filplot='toto'

taille=0.005 !taille des elements

!Définitition des éléments
!-------------------------

ET,1,63 !plaques mécaniques structure

r,1,0.8e-3

!========================
!Définition des matériaux
!========================

!Mat1
!---------

dens,1,3000
ex,1,20000e6
nuxy,1,0.33

!Mat2
!---------

dens,2,1000
ex,2,70000e6
nuxy,2,0.33

!==============================================
! Géométrie
!==============================================

allsel
csys,0 $ wpcsys,-1
rect,0e-3,20e-3,0,200e-3

csys,0 $ cloc,11,0,0,0,2e-3,,, $ wpcsys,-1
rect,0e-3,20e-3,0,200e-3

csys,0 $ cloc,11,0,0,0,0,,90, $ wpcsys,-1
rect,0e-3,20e-3,0,2e-3

csys,0 $ cloc,11,0,0,200e-3,0,,90, $ wpcsys,-1
rect,0e-3,20e-3,0,2e-3

aplot

allsel
nummrg,kp,1e-6

!-----------
!Mesh
!-----------

csys,0 $ wpcsys,-1
asel,s,loc,z,0
esize,2e-3
type,1
mat,1
real,1
amesh,all

csys,0 $ wpcsys,-1
asel,s,loc,z,2e-3
esize,2e-3
type,1
mat,2
real,1
amesh,all

csys,0 $ wpcsys,-1
asel,s,loc,y,0
esize,2e-3
type,1
mat,2
real,1
amesh,all

csys,0 $ wpcsys,-1
asel,s,loc,y,200e-3
esize,2e-3
type,1
mat,2
real,1
amesh,all

nummrg,kp,1e-6
*get,NUM,node,,num,max


!==============
!analyse modale
!==============

csys,0 $ wpcsys,-1
esel,s,mat,,1
nsle
nsel,r,loc,y,0
d,all,all,0

csys,0 $ wpcsys,-1
esel,s,mat,,1
nsle
nsel,r,loc,y,200e-3
d,all,all,0


!==============
!Calcul de la solution
!==============


/solu
allsel
antyp,modal
modopt,lanb,10,0,2000
mxpand,10,0,2000,no
outpr,,
/out,outtoto,lst
solve
/out

/post1
set,1,3
/view,,-1,-1,1
/title,MODAL ANALYSIS - Travail
plns,u,sum

 

[meshparts]

Hello,

you should describe your problem with more details. From your input code I see, you are doing a modal analysis of two metal sheets bounded together at the two ends.

I assume, that you want the 2 sheets to collide with each other when vibrating.

This can not happen in a modal analysis due to the linear nature of the problem.

If you don't want penetration, the you must use contact or gap elements and do a transient analysis.

Regards,
Alex

 

[OkapiEng]

Alex,

Thank you for your answer

You understand my probleme

But, i don't use gap element, i use ANSYS since 2 week...

Best regards,
Okapi