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Shell solid contact pair

N.S.T
Dear All,

I have created a model using shell element S4R and solid element C3D8R. Then defined the contact pair between the surfaces as follows,


*CONTACT PAIR, INTERA=FRIC, NO THICKNESS, TYPE=SURFACE TO SURFACE,
TRACKING=PATH
Solid_SURF1, Shell_SURF1
*SURFACE INTERACTION, NAME=FRIC
*FRICTION
 0.2,
*SURFACE BEHAVIOR, DIRECT, PRESSURE-OVERCLOSURE=HARD

and in the "step" i used following keywords,

1st step

*STEP, AMPLITUDE=RAMP, INC=6000000, NLGEOM=YES
*STATIC,STABILIZE
0.0025, 1.0
*CLOAD
TOP_NODE, 3, -0.190505D6
*CONTACT CONTROLS, AUTOMATIC TOLERANCES
*MONITOR, NODE=TOP_NODE, DOF=3
*END STEP

2nd step

*AMPLITUDE, NAME=CYCLIC, DEFINITION=TABULAR, TIME=TOTAL TIME
1,0,2,1,4,-1,7,2,
11,-2,16,3,22,-3,29,4,
37,-4,46,5,56
*STEP, AMPLITUDE=RAMP, INC=6000000, NLGEOM=YES
*STATIC,STABILIZE
0.0025, 56
*CONTROLS,ANALYSIS=DISCONTINUOUS,FIELD=DISPLACEMENT
*CONTACT CONTROLS, AUTOMATIC TOLERANCES
*BOUNDARY,  AMPLITUDE=CYCLIC,TYPE=DISPLACEMENT
 TOP_NODE,1, 1, 10.4045
*END STEP

I got the following NOTE in the .dat file.

***NOTE: THE  ROTATIONAL DEGREES OF FREEDOM OF THE NODES THAT CONSTITUTE THE
          MASTER SURFACE WILL NOT BE CONSTRAINED BETWEEN THE SLAVE AND MASTER
          PAIR (SOLID_SURF1, SHELL_SURF1)

I don't understand the meaning of this note,  please help if anyone know this problem,
So that by what changes i can eliminate this NOTE?

Regards,
NST.

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Re: Shell solid contact pair

Dave Lindeman
Your slave surface is on the continuum elements (translational
degrees-of-freedom only), and your master surface is on the shell
elements (translational and rotational degrees-of-freedom).  The message
is simply indicating that the rotational degrees-of-freedom will not be
involved in the contact interaction.  For the type of contact you've
defined, this is probably fine/correct.  However, if you were attempting
to define a shell-to-solid connection using bonded contact, then you
would want to reverse the roll of your two surfaces so that the
rotational degrees-of-freedom of the shells at the bonded interface
would be functions of the translational degrees-of-freedom of the
continuum elements.

Note:  It's a "NOTE", not an "ERROR", or even a "WARNING", so ABAQUS
isn't indicating that something is wrong, it's just reminding you that
you've requested a particular behavior.  If the calculated
motions/deformations aren't as you expected, then the "NOTE" might
provide a possible explanation for why the simulation differs from your
expectations.

Regards,

Dave


-------------------------
Dave Lindeman
Lead Research Specialist
3M Company
3M Center 235-3F-08
St. Paul, MN 55144
651-733-6383

On 2/13/2010 6:03 AM, N.S.T wrote:

>
>
>
> Dear All,
>
> I have created a model using shell element S4R and solid element C3D8R. Then
> defined the contact pair between the surfaces as follows,
>
> *CONTACT PAIR, INTERA=FRIC, NO THICKNESS, TYPE=SURFACE TO SURFACE,
> TRACKING=PATH
> Solid_SURF1, Shell_SURF1
> *SURFACE INTERACTION, NAME=FRIC
> *FRICTION
> 0.2,
> *SURFACE BEHAVIOR, DIRECT, PRESSURE-OVERCLOSURE=HARD
>
> and in the "step" i used following keywords,
>
> 1st step
>
> *STEP, AMPLITUDE=RAMP, INC=6000000, NLGEOM=YES
> *STATIC,STABILIZE
> 0.0025, 1.0
> *CLOAD
> TOP_NODE, 3, -0.190505D6
> *CONTACT CONTROLS, AUTOMATIC TOLERANCES
> *MONITOR, NODE=TOP_NODE, DOF=3
> *END STEP
>
> 2nd step
>
> *AMPLITUDE, NAME=CYCLIC, DEFINITION=TABULAR, TIME=TOTAL TIME
> 1,0,2,1,4,-1,7,2,
> 11,-2,16,3,22,-3,29,4,
> 37,-4,46,5,56
> *STEP, AMPLITUDE=RAMP, INC=6000000, NLGEOM=YES
> *STATIC,STABILIZE
> 0.0025, 56
> *CONTROLS,ANALYSIS=DISCONTINUOUS,FIELD=DISPLACEMENT
> *CONTACT CONTROLS, AUTOMATIC TOLERANCES
> *BOUNDARY, AMPLITUDE=CYCLIC,TYPE=DISPLACEMENT
> TOP_NODE,1, 1, 10.4045
> *END STEP
>
> I got the following NOTE in the .dat file.
>
> ***NOTE: THE ROTATIONAL DEGREES OF FREEDOM OF THE NODES THAT CONSTITUTE THE
> MASTER SURFACE WILL NOT BE CONSTRAINED BETWEEN THE SLAVE AND
> MASTER
> PAIR (SOLID_SURF1, SHELL_SURF1)
>
> I don't understand the meaning of this note, please help if anyone know
> this problem,
> So that by what changes i can eliminate this NOTE?
>
> Regards,
> NST.
>
> -----
> +---------+---------+---------+---------+---------+---------+
> Kulkarni Nishiagndha G. (D1)
> E-mail:[hidden email]
> <mailto:kulkarni%40civil.nagoya-u.ac.jp>
> Department of Civil Engineering, Nagoya University, JAPAN.
> +---------+---------+---------+---------+---------+---------+
> --
> View this message in context:
> http://old.nabble.com/Shell-solid-contact-pair-tp27574540p27574540.html
> <http://old.nabble.com/Shell-solid-contact-pair-tp27574540p27574540.html>
> Sent from the Abaqus Users mailing list archive at Nabble.com.
>
>


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Re: Shell solid contact pair

N.S.T
Dear Dave,

     Thank you very much for your valuable suggestion.
 Now, I have understood the meaning of that ***NOTE.

Thanks once again for quick reply.


Regards,
N.S.T

Dave Lindeman wrote
Your slave surface is on the continuum elements (translational
degrees-of-freedom only), and your master surface is on the shell
elements (translational and rotational degrees-of-freedom).  The message
is simply indicating that the rotational degrees-of-freedom will not be
involved in the contact interaction.  For the type of contact you've
defined, this is probably fine/correct.  However, if you were attempting
to define a shell-to-solid connection using bonded contact, then you
would want to reverse the roll of your two surfaces so that the
rotational degrees-of-freedom of the shells at the bonded interface
would be functions of the translational degrees-of-freedom of the
continuum elements.

Note:  It's a "NOTE", not an "ERROR", or even a "WARNING", so ABAQUS
isn't indicating that something is wrong, it's just reminding you that
you've requested a particular behavior.  If the calculated
motions/deformations aren't as you expected, then the "NOTE" might
provide a possible explanation for why the simulation differs from your
expectations.

Regards,

Dave


-------------------------
Dave Lindeman
Lead Research Specialist
3M Company
3M Center 235-3F-08
St. Paul, MN 55144
651-733-6383

On 2/13/2010 6:03 AM, N.S.T wrote:
>
>
>
> Dear All,
>
> I have created a model using shell element S4R and solid element C3D8R. Then
> defined the contact pair between the surfaces as follows,
>
> *CONTACT PAIR, INTERA=FRIC, NO THICKNESS, TYPE=SURFACE TO SURFACE,
> TRACKING=PATH
> Solid_SURF1, Shell_SURF1
> *SURFACE INTERACTION, NAME=FRIC
> *FRICTION
> 0.2,
> *SURFACE BEHAVIOR, DIRECT, PRESSURE-OVERCLOSURE=HARD
>
> and in the "step" i used following keywords,
>
> 1st step
>
> *STEP, AMPLITUDE=RAMP, INC=6000000, NLGEOM=YES
> *STATIC,STABILIZE
> 0.0025, 1.0
> *CLOAD
> TOP_NODE, 3, -0.190505D6
> *CONTACT CONTROLS, AUTOMATIC TOLERANCES
> *MONITOR, NODE=TOP_NODE, DOF=3
> *END STEP
>
> 2nd step
>
> *AMPLITUDE, NAME=CYCLIC, DEFINITION=TABULAR, TIME=TOTAL TIME
> 1,0,2,1,4,-1,7,2,
> 11,-2,16,3,22,-3,29,4,
> 37,-4,46,5,56
> *STEP, AMPLITUDE=RAMP, INC=6000000, NLGEOM=YES
> *STATIC,STABILIZE
> 0.0025, 56
> *CONTROLS,ANALYSIS=DISCONTINUOUS,FIELD=DISPLACEMENT
> *CONTACT CONTROLS, AUTOMATIC TOLERANCES
> *BOUNDARY, AMPLITUDE=CYCLIC,TYPE=DISPLACEMENT
> TOP_NODE,1, 1, 10.4045
> *END STEP
>
> I got the following NOTE in the .dat file.
>
> ***NOTE: THE ROTATIONAL DEGREES OF FREEDOM OF THE NODES THAT CONSTITUTE THE
> MASTER SURFACE WILL NOT BE CONSTRAINED BETWEEN THE SLAVE AND
> MASTER
> PAIR (SOLID_SURF1, SHELL_SURF1)
>
> I don't understand the meaning of this note, please help if anyone know
> this problem,
> So that by what changes i can eliminate this NOTE?
>
> Regards,
> NST.
>
> -----
> +---------+---------+---------+---------+---------+---------+
> Kulkarni Nishiagndha G. (D1)
> E-mail:kulkarni@civil.nagoya-u.ac.jp
> <mailto:kulkarni%40civil.nagoya-u.ac.jp>
> Department of Civil Engineering, Nagoya University, JAPAN.
> +---------+---------+---------+---------+---------+---------+
> --
> View this message in context:
> http://old.nabble.com/Shell-solid-contact-pair-tp27574540p27574540.html
> <http://old.nabble.com/Shell-solid-contact-pair-tp27574540p27574540.html>
> Sent from the Abaqus Users mailing list archive at Nabble.com.
>
>


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