How to turn a line into a thin 2D area?

Member Posts: 2

Hello, I am trying to model a thin walled pressure vessel using axisymmetric option for solid element. I have a set of lines which draw the outer edge. I've done it with shell elements easily, I now want to model it using Solid 182 elements using axisymmetric option. However, I need to mesh area for plane elements. How do I add thickness to my lines so that instead of lines, I have 2d areas that still draw the outer edge?

Thanks

Tagged:

• Posts: 3Member

This is in Mechanical APDL

• Posts: 62Ansys Employee

Please try this test case I created then see if you can apply this strategy to your model:

fini

/cle

/vie,1,1,1,1

/pnu,kp,1

C*** PARAMETERS

l=1 ! LENGTH OF STRAIGHT SECTION BETWEEN SPHERICAL ENDS

t=0.10 ! PRESSURE VESSEL WALL THICKNESS

C*** PRESSURE VESSEL EXTERNAL SURFACE

/prep7

wpcs,-1,0

wpof,,-l/2

cswp,11,1

k,1,r,-90

k,2,r,0

l,1,2

wpof,,l

cswp,12,1

k,3,r

k,4,r,90

l,3,4

csys

l,2,3

lplo

/wait,2

C*** CREATE AREA REPRESENTING PRESSURE VESSEL WALL CROSS SECTION

allsel

numc,line

csys

*get,ymin,kp,,mnloc,y

*get,ymax,kp,,mxloc,y

kgen,2,kp(0,0,ymin),,,0,0,t,500

l,kp(0,0,ymin),kp(0,0,ymin)+500

*get,lmax,line,,num,max

aoff,all,-t,1000

lsel,s,loc,z

asel,none

l,kp(0,ymin,0),kp(0,ymin,0)+1000

l,kp(0,ymax,0),kp(0,ymax,0)+1000

al,all

cm,keep_a,area

cm,keep_l,line

alls

cmse,u,keep_a

cmse,u,keep_l

ldel,all,,,1

alls

aplo

Best,

Bill