Contact problem

[Xuannamdo-danang]

Dear Professor Taylor,

In order complete my mesh, I do by the same way for the rest of circle as follows:

...

Contact

Surface 1
Linear
Facets
data

Surface 2
Linear
Facets
data

MATErial 3
 STANDard
 FRICtion COULomb 0.6

PAIR 1
  NTOS 2 1
  SOLM PENAlty 1d8 1d8
  AUGMent
  MATE ,, 2 1
  TOLE,,1e-5 1e-5 1e-5

Surface 3
Linear
Facets
data

Surface 4
Linear
Facets
data

MATErial 4
 STANDard
 FRICtion COULomb 0.6

PAIR 2
  NTOS 4 3
  SOLM PENAlty 1d8 1d8
  AUGMent
  MATE ,, 4 3
  TOLE,,1e-5 1e-5 1e-5

end

...

However, only one pair of surfaces 1 and 2 exists on mesh.

Please tell me how to have the second pair of surfaces 3 and 4 like expected

Thank you so much

Your sincerely,
DO XUAN NAM

[Prof. R.L. Taylor]

Your second pair must not be defined according to a right-hand rule.  If you just do the solution commands

TIME
CONT CHECK
UTANG,,1

PLOT MESH

You will see that the mesh is completely deformed.  This is due to a redefine of the mesh to prevent penetration at the start and thus says the interfaces are not properly oriented.

[Xuannamdo-danang]

Thank you so much for your quick reply, Professor Taylor. I completed my mesh like expected

Yours sincerely,
DO XUAN NAM