GiD forum

Dear GiD team,

My model has several materials, which are well represented by GiD volume
sets. I wonder, when I smooth contour plots, can I ask GiD to only smooth
values inside each volume instead of the whole model? In other words, I do
not want to average results between elements of different material properties.

thanks, Steven

If your results are located on gauss points, a smooth contour plot
extrapolate the results to nodes.
If your volume sets share the boundary nodes between materials, then your
result is an averaged single value.
To avoid this smooth between materials, must duplicate this nodes in your
mesh, and then each node can store your own set value.

You can also write directly the result on nodes instead on gauss points, and
then you have full control over this extrapolated and averaged values.

Enrique Escolano

----- Original Message -----
From: "Steven Xu" sx25 at cornell.edu
To: gidlist at gatxan.cimne.upc.es
Sent: Monday, October 20, 2003 10:37 PM
Subject: [GiDlist] smoothing contour fill


Dear GiD team,

My model has several materials, which are well represented by GiD volume
sets. I wonder, when I smooth contour plots, can I ask GiD to only smooth
values inside each volume instead of the whole model? In other words, I do
not want to average results between elements of different material
properties.

thanks, Steven

_______________________________________________
GiDlist mailing list
GiDlist at gid.cimne.upc.es
http://gid.cimne.upc.es/mailman/listinfo/gidlist

Dear GiD users,

I want to insert interface elements (they are useful to model cohesive
interactions between the two bodies) at the boundaries of regular elements.
I wonder if current GiD mesher supports this. If not, has anybody looked at
this issue?

Thanks, Steven

I don't understand your question. You must explain it in more detail.

You generate the "regular" body elements with GiD from a geometric model, or
it's a imported mesh?
What are the requeriment of your 'interface elements'?
It can be only a condition to link two group of faces: master an slave?
It's needed a relation one-to-one between nodes master and slave, or it's
valid a relation many-to-many?

If you need a one-to-one relation, read the help about contact creation.

Enrique Escolano

----- Original Message -----
From: "Steven Xilin Xu" sx25 at cornell.edu
To: gidlist at gatxan.cimne.upc.es
Sent: Wednesday, November 26, 2003 10:36 PM
Subject: [GiDlist] interface element


Dear GiD users,

I want to insert interface elements (they are useful to model cohesive
interactions between the two bodies) at the boundaries of regular
elements.
I wonder if current GiD mesher supports this. If not, has anybody looked
at
this issue?

Thanks, Steven

_______________________________________________
GiDlist mailing list
GiDlist at gid.cimne.upc.es
http://gid.cimne.upc.es/mailman/listinfo/gidlist

Enrique,

Thank you very much for taking my question. Contact creation described in
GiD manual seems relevant to what I wanted, and I definitely should explore
it before posing more questions. By any chance, is there any tutorial
problem on contact creation available somewhere?

Thanks, Steven

-----Original Message-----
From: gidlist-admin at gatxan.cimne.upc.es
[mailto:gidlist-admin at gatxan.cimne.upc.es] On Behalf Of Enrique Escolano
Sent: Thursday, November 27, 2003 5:20 AM
To: gidlist at gatxan.cimne.upc.es
Subject: Re: [GiDlist] interface element

I don't understand your question. You must explain it in more detail.

You generate the "regular" body elements with GiD from a geometric model, or
it's a imported mesh?
What are the requeriment of your 'interface elements'?
It can be only a condition to link two group of faces: master an slave?
It's needed a relation one-to-one between nodes master and slave, or it's
valid a relation many-to-many?

If you need a one-to-one relation, read the help about contact creation.

Enrique Escolano

----- Original Message -----
From: "Steven Xilin Xu" sx25 at cornell.edu
To: gidlist at gatxan.cimne.upc.es
Sent: Wednesday, November 26, 2003 10:36 PM
Subject: [GiDlist] interface element


Dear GiD users,

I want to insert interface elements (they are useful to model cohesive
interactions between the two bodies) at the boundaries of regular
elements.
I wonder if current GiD mesher supports this. If not, has anybody looked
at
this issue?

Thanks, Steven

_______________________________________________
GiDlist mailing list
GiDlist at gid.cimne.upc.es
http://gid.cimne.upc.es/mailman/listinfo/gidlist


_______________________________________________
GiDlist mailing list
GiDlist at gid.cimne.upc.es
http://gid.cimne.upc.es/mailman/listinfo/gidlist

It not exists any specific tutorial about GiD contacts.
The main idea of a GiD contact between two surfaces is to force to have the
same duplicated mesh for this two surfaces
(to have a one-to-one node relation), and create contact elements to provide
a link between this nodes.
The two surfaces must have the same shape. If they are in the same location,
can create a volume contact with:
Geometry-Create-Contact-Volume
and selecting the two surfaces.
If the surfaces are in different location (tranlated with a rigid body
movement), must use:
Geometry-Create-Contact-Separated Volume

If you mesh with tetrahedras, and also have volume contacts, then are
obtained prisms as contact elements, joining the triangular faces of the
linked tetrahedras.

Enrique Escolano

----- Original Message -----
From: "Steven Xilin Xu" sx25 at cornell.edu
To: gidlist at gatxan.cimne.upc.es
Sent: Thursday, November 27, 2003 6:04 PM
Subject: RE: [GiDlist] interface element


Enrique,

Thank you very much for taking my question. Contact creation described in
GiD manual seems relevant to what I wanted, and I definitely should
explore
it before posing more questions. By any chance, is there any tutorial
problem on contact creation available somewhere?

Thanks, Steven

-----Original Message-----
From: gidlist-admin at gatxan.cimne.upc.es
[mailto:gidlist-admin at gatxan.cimne.upc.es] On Behalf Of Enrique Escolano
Sent: Thursday, November 27, 2003 5:20 AM
To: gidlist at gatxan.cimne.upc.es
Subject: Re: [GiDlist] interface element

I don't understand your question. You must explain it in more detail.

You generate the "regular" body elements with GiD from a geometric model,
or
it's a imported mesh?
What are the requeriment of your 'interface elements'?
It can be only a condition to link two group of faces: master an slave?
It's needed a relation one-to-one between nodes master and slave, or it's
valid a relation many-to-many?

If you need a one-to-one relation, read the help about contact creation.

Enrique Escolano

----- Original Message -----
From: "Steven Xilin Xu" sx25 at cornell.edu
To: gidlist at gatxan.cimne.upc.es
Sent: Wednesday, November 26, 2003 10:36 PM
Subject: [GiDlist] interface element


Dear GiD users,

I want to insert interface elements (they are useful to model cohesive
interactions between the two bodies) at the boundaries of regular
elements.
I wonder if current GiD mesher supports this. If not, has anybody looked
at
this issue?

Thanks, Steven

_______________________________________________
GiDlist mailing list
GiDlist at gid.cimne.upc.es
http://gid.cimne.upc.es/mailman/listinfo/gidlist


_______________________________________________
GiDlist mailing list
GiDlist at gid.cimne.upc.es
http://gid.cimne.upc.es/mailman/listinfo/gidlist

_______________________________________________
GiDlist mailing list
GiDlist at gid.cimne.upc.es
http://gid.cimne.upc.es/mailman/listinfo/gidlist

Enrique,

Thank you very much for your nice follow-up. I really appreciate your
patience and kind help when we learn/explore GiD.

Ok, I think I can now ask specific questions about what I need. If I
understand correctly, the contact creation mentioned in GiD manual bases on
two different geometrical entities which are physically locate in the same
place. The problem I have is somewhat different:
1. The geometry is created in GiD, and partitioned into many layers. Note
that adjacent layers share same geometrical entities (line in 2D, and
surface in 3D).
2. Besides regular mesh for area/volume inside the layers, I want to put
contact-like elements on interface regions between layers. Then I want to
export both regular elements and interface elements for analysis.

I see three options to insert contact-like elements on interface between
layers.
1. I could modify the way how the geometry is created. Make two adjacent
layers do not share the same geometrical entities. This way, I could use
contact creation in GiD. (Suppose I did this, can GiD automatically insert
contact elements for all contact pairs without selecting individual pairs?)
2. I could do inserting outside the GiD. Create geometry and do the regular
mesh in GiD. And then output these data to an external module (I need to
write this) to do the insertion.
3. Suppose GiD has the option to insert contact-like elements between layers
(areas in 2D, volumes in 3D) even though these layers share same geometrical
entities. If this is the case, my life would be easier.

Enrique, I appreciate if you could let me know what you think about the
above options.

Thanks, Steven


-----Original Message-----
From: gidlist-admin at gatxan.cimne.upc.es
[mailto:gidlist-admin at gatxan.cimne.upc.es] On Behalf Of Enrique Escolano
Sent: Friday, November 28, 2003 4:45 AM
To: gidlist at gatxan.cimne.upc.es
Subject: Re: [GiDlist] interface element

It not exists any specific tutorial about GiD contacts.
The main idea of a GiD contact between two surfaces is to force to have the
same duplicated mesh for this two surfaces
(to have a one-to-one node relation), and create contact elements to provide
a link between this nodes.
The two surfaces must have the same shape. If they are in the same location,
can create a volume contact with:
Geometry-Create-Contact-Volume
and selecting the two surfaces.
If the surfaces are in different location (tranlated with a rigid body
movement), must use:
Geometry-Create-Contact-Separated Volume

If you mesh with tetrahedras, and also have volume contacts, then are
obtained prisms as contact elements, joining the triangular faces of the
linked tetrahedras.

Enrique Escolano

----- Original Message -----
From: "Steven Xilin Xu" sx25 at cornell.edu
To: gidlist at gatxan.cimne.upc.es
Sent: Thursday, November 27, 2003 6:04 PM
Subject: RE: [GiDlist] interface element


Enrique,

Thank you very much for taking my question. Contact creation described in
GiD manual seems relevant to what I wanted, and I definitely should
explore
it before posing more questions. By any chance, is there any tutorial
problem on contact creation available somewhere?

Thanks, Steven

-----Original Message-----
From: gidlist-admin at gatxan.cimne.upc.es
[mailto:gidlist-admin at gatxan.cimne.upc.es] On Behalf Of Enrique Escolano
Sent: Thursday, November 27, 2003 5:20 AM
To: gidlist at gatxan.cimne.upc.es
Subject: Re: [GiDlist] interface element

I don't understand your question. You must explain it in more detail.

You generate the "regular" body elements with GiD from a geometric model,
or
it's a imported mesh?
What are the requeriment of your 'interface elements'?
It can be only a condition to link two group of faces: master an slave?
It's needed a relation one-to-one between nodes master and slave, or it's
valid a relation many-to-many?

If you need a one-to-one relation, read the help about contact creation.

Enrique Escolano

----- Original Message -----
From: "Steven Xilin Xu" sx25 at cornell.edu
To: gidlist at gatxan.cimne.upc.es
Sent: Wednesday, November 26, 2003 10:36 PM
Subject: [GiDlist] interface element


Dear GiD users,

I want to insert interface elements (they are useful to model cohesive
interactions between the two bodies) at the boundaries of regular
elements.
I wonder if current GiD mesher supports this. If not, has anybody looked
at
this issue?

Thanks, Steven

_______________________________________________
GiDlist mailing list
GiDlist at gid.cimne.upc.es
http://gid.cimne.upc.es/mailman/listinfo/gidlist


_______________________________________________
GiDlist mailing list
GiDlist at gid.cimne.upc.es
http://gid.cimne.upc.es/mailman/listinfo/gidlist

_______________________________________________
GiDlist mailing list
GiDlist at gid.cimne.upc.es
http://gid.cimne.upc.es/mailman/listinfo/gidlist


_______________________________________________
GiDlist mailing list
GiDlist at gid.cimne.upc.es
http://gid.cimne.upc.es/mailman/listinfo/gidlist

Dear GiD users,

At GiD Reference Manual - PostprocessDatafiles - New postprocess results
format - Gauss Points, the order of 27 Gauss Points in hexahedras in the
figure seems not consistent with what listed below the figure. For example,
the coordinate for point 2 in the figure is (a, -a, -a), but it is listed as
(-a, -a, a). I wonder which order is inside GiD.

Thanks, Steven

Yes, do you have reason: The picture is ok, but the coordinates list is
wrong.

This is the corrected list:

a=0.77459667
Internal coordinates:
(-a,-a,-a) ( a,-a,-a) ( a, a,-a) (-a, a,-a)
(-a,-a, a) ( a,-a, a) ( a, a, a) (-a, a, a)
( 0,-a,-a) ( a, 0,-a) ( 0, a,-a) (-a, 0,-a)
(-a,-a, 0) ( a,-a, 0) ( a, a, 0) (-a, a, 0)
( 0,-a, a) ( a, 0, a) ( 0, a, a) (-a, 0, a)
( 0, 0,-a)
( 0,-a, 0) ( a, 0, 0) ( 0, a, 0) (-a, 0, 0)
( 0, 0, a)
( 0, 0, 0)


This bug is fixed for the next beta version
Thanks for your bug report

Enrique Escolano

----- Original Message -----
From: "Steven Xilin Xu" sx25 at cornell.edu
To: gidlist at gatxan.cimne.upc.es
Sent: Friday, December 12, 2003 6:04 AM
Subject: [GiDlist] order of internal Gauss points in GiD



Dear GiD users,

At GiD Reference Manual - PostprocessDatafiles - New postprocess results
format - Gauss Points, the order of 27 Gauss Points in hexahedras in the
figure seems not consistent with what listed below the figure. For
example,
the coordinate for point 2 in the figure is (a, -a, -a), but it is listed
as
(-a, -a, a). I wonder which order is inside GiD.

Thanks, Steven

_______________________________________________
GiDlist mailing list
GiDlist at gid.cimne.upc.es
http://gid.cimne.upc.es/mailman/listinfo/gidlist

-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/gif
Size: 3230 bytes
Desc: not available
Url : http://listas.cimne.upc.edu/pipermail/gidlist/attachments/20031212/36051288/attachment.gif

Hello Enrique and all
Merry Christmas anyway!!

If I remember, up to what version of GiD we can draw a
post processing on the Gausspoint as an average values
to the nodal points??
Please refer to some reference if any so that I will
take a look..or give your brief explain..


Regards.

__________________________________
Do you Yahoo!?
Protect your identity with Yahoo! Mail AddressGuard
http://antispam.yahoo.com/whatsnewfree