Learning Forum

[Nuno koh]

Hello~

I'm beginner of ANSYS APDL.

I'm interested in contact stress.

I have been trying for it with the text "ENGINEERING ANALYSIS with ANSYS SOFTWARE (Author: Y. Nakasone and S. Yoshimoto)".

The Contact stress problem is described in 120page ~138page in the text.

I have followed the text, But I can't get the solution.

What is wrong ?

I have added the capture image for the contact stress problem from the text.

Plz, refer to the link below for details.

https://drive.google.com/file/d/16KlDF9rfwiavOuHUf8gOBvPjTIbJ4Nb6/view?usp=sharing

 

Plz, refer to the link below with Input file 

https://drive.google.com/file/d/1mdRnHIxMYPpS_o5oCdPq5f_w6h13CSvv/view?usp=sharing

 

 

 

 

Thanks.

 

[Sandeep Medikonda]

Nuno kon,

I am unable to download any files.

Can you please post an image using the Insert Image option?

  

Thanks,

Sandeep

[Nuno koh]

 [My Input File]

/PREP7 

BLC4,0,0,500,-500  

CYL4,0,500,500,-90,500,0

SAVE

SAVE

FLST,2,2,5,ORDE,2  

FITEM,2,1  

FITEM,2,-2 

AGLUE,P51X 

!* 

MPTEMP,,,,,,,, 

MPTEMP,1,0 

MPDATA,EX,1,,2.1E5 

MPDATA,PRXY,1,,0.3 

!* 

ET,1,PLANE183  

!* 

KEYOPT,1,1,0

KEYOPT,1,3,2

KEYOPT,1,6,0

!* 

ET,2,TARGE169  

!* 

ET,3,CONTA172  

!* 

FLST,5,2,4,ORDE,2  

FITEM,5,2  

FITEM,5,-3 

CM,_Y,LINE 

LSEL, , , ,P51X

CM,_Y1,LINE

CMSEL,,_Y  

!* 

LESIZE,_Y1, , ,60,1/10, , , ,1 

!* 

FLST,5,2,4,ORDE,2  

FITEM,5,1  

FITEM,5,4  

CM,_Y,LINE 

LSEL, , , ,P51X

CM,_Y1,LINE

CMSEL,,_Y  

!* 

LESIZE,_Y1, , ,60,10, , , ,1

!* 

FLST,5,2,4,ORDE,2  

FITEM,5,8  

FITEM,5,-9 

CM,_Y,LINE 

LSEL, , , ,P51X

CM,_Y1,LINE

CMSEL,,_Y  

!* 

LESIZE,_Y1, , ,40,10, , , ,1

!* 

FLST,5,1,4,ORDE,1  

FITEM,5,6  

CM,_Y,LINE 

LSEL, , , ,P51X

CM,_Y1,LINE

CMSEL,,_Y  

!* 

LESIZE,_Y1, , ,40,1/10, , , ,1 

!* 

MSHKEY,0

FLST,5,2,5,ORDE,2  

FITEM,5,1  

FITEM,5,3  

CM,_Y,AREA 

ASEL, , , ,P51X

CM,_Y1,AREA

CHKMSH,'AREA'  

CMSEL,S,_Y 

!* 

AMESH,_Y1  

!* 

CMDELE,_Y  

CMDELE,_Y1 

CMDELE,_Y2

!* 

 

!!!!!!!!!!  Cylinder btm surface line selection/!!!!!!!!!!

LSEL,S, , ,       8

!!!!!!!!!!  /Cylinder btm surface line selection!!!!!!!!!!

!!!!!!!!!!  Cylinder btm surface node selection/!!!!!!!!!!

NSLL,R,1

!!!!!!!!!!  / Cylinder btm surface node selection!!!!!!!!!!

 

 

!!!!!!!!!!  Cylinder Btm surface contact point near area selection/!!!!!!!!!!

FLST,5,14,1,ORDE,3 

FITEM,5,242

FITEM,5,11043  

FITEM,5,-11055 

NSEL,R, , ,P51X

!!!!!!!!!!  /Cylinder Btm surface contact point  near area selection/!!!!!!!!!!

 

!!!!!!!!!!  Contact element define of cylinder btm surface /!!!!!!!!!!!!!

TYPE,   3  

MAT,       1

REAL,  

ESYS,       0  

SECNUM,

TSHAP,LINE 

!* 

!!!!!!!!!!  /Contact element define of cylinder btm surface !!!!!!!!!!!!!

save

!!!!!!!!!!  Contact element attach on cylinder btm surface /!!!!!!!!!!!!!

FLST,5,14,1,ORDE,3 

FITEM,5,242

FITEM,5,11043  

FITEM,5,-11055 

CM,_Y,NODE 

NSEL, , , ,P51X

CM,_Y1,NODE

CMSEL,S,_Y 

!* 

CMSEL,,_Y1 

ESURF, ,BOT,

CMSEL,,_Y  

CMDELE,_Y  

CMDELE,_Y1 

!!!!!!!!!!  /Contact element attach on cylinder btm surface !!!!!!!!!!!!!

save

ALLSEL,ALL

 

!!!!!!!!!!  Flat plate Top surface line selection/!!!!!!!!!!

LSEL,S, , ,       3

!!!!!!!!!!  /Flat plate Top surface line selection!!!!!!!!!!

!!!!!!!!!!  Flat plate Top surface node selection/!!!!!!!!!!

NSLL,R,1

!!!!!!!!!!  /Flat plate Top surface node selection!!!!!!!!!!

 

!!!!!!!!!!  Flat plate Top surface contact point  near area selection/!!!!!!!!!!

FLST,5,23,1,ORDE,3 

FITEM,5,242

FITEM,5,340

FITEM,5,-361

NSEL,R, , ,P51X

!!!!!!!!!!  /Flat plate Top surface contact point  near area selection!!!!!!!!!!

!!!!!!!!!!  Target element define on Flat plate Top surface/!!!!!!!!!!!!!

TYPE,   2  

MAT,       1

REAL,  

[Sandeep Medikonda]

Hi Nuno kon,

You are missing contact...not sure how it got that way, but the message suggests database corruption.  If you cannot add in the contact to the existing model, you should just start over. 

cdwrite/cdread sometimes resolves db corruption issues.

Regards,

Sandeep