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Hi Errol,<br>
This is exactly what I wanted. Did Solidworks automatically find and
correct the errors? Do you have any other suggestions for modifying
the iges files?<br>
<br>
Thanks,<br>
Omid<br>
<br>
<div class="moz-cite-prefix">On 14-09-03 01:03 PM,
<a class="moz-txt-link-abbreviated" href="mailto:erroll.brady@gmail.com">erroll.brady@gmail.com</a> wrote:<br>
</div>
<blockquote
cite="mid:ad2078bc-3edf-49bf-93e9-0fe906fba2f2@googlegroups.com"
type="cite">
<div dir="ltr">Hi Omid,
<div>Try the attached Block2.zip.</div>
<p class="separator" style="text-align: center; clear: both;"><span
style="font-size: 13px;">Erroll</span></p>
<p class="separator" style="text-align: left; clear: both;"><a
moz-do-not-send="true" imageanchor="1"
href="https://lh5.googleusercontent.com/-EkE2FS91LsI/VAdJvqh3QUI/AAAAAAAAAAw/pfpGUvqDVdQ/s1600/Block2.jpg"
style="margin-left: 1em; margin-right: 1em;"><img
moz-do-not-send="true"
src="https://lh5.googleusercontent.com/-EkE2FS91LsI/VAdJvqh3QUI/AAAAAAAAAAw/pfpGUvqDVdQ/s320/Block2.jpg"
style="" border="0" height="274" width="320"></a></p>
<div><br>
<br>
On Tuesday, September 2, 2014 9:39:45 PM UTC-7, Omid Mahabadi
wrote:
<blockquote class="gmail_quote" style="margin: 0;margin-left:
0.8ex;border-left: 1px #ccc solid;padding-left: 1ex;">
<div bgcolor="#FFFFFF" text="#000000"> Hi Errol,<br>
In the version you sent me, the hole is through-going, in
other words, it goes through the entire depth of the cube
(along z). However, my desired geometry requires a hole
that doesn't go through the entire depth (say it has half
of the depth of the exterior cube).<br>
<br>
Thank you,<br>
Omid<br>
<br>
<br>
<div>On 14-09-02 06:04 PM, <a moz-do-not-send="true"
href="javascript:" target="_blank"
gdf-obfuscated-mailto="yRkuJvL7JFcJ"
onmousedown="this.href='javascript:';return true;"
onclick="this.href='javascript:';return true;">erroll...@gmail.com</a>
wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<div>Hello Omid,</div>
<div>Solidworks found errors in your IGES file. Try
the attached STEP, GEO and MSH files.</div>
<p style="text-align:center;clear:both"><a
moz-do-not-send="true"
href="https://lh4.googleusercontent.com/-nxF0eT1U3qQ/VAY-5mA30KI/AAAAAAAAAAg/aQ6Sqk53Fp8/s1600/Block%2BMesh.jpg"
style="margin-left:1em;margin-right:1em"
target="_blank"
onmousedown="this.href='https://lh4.googleusercontent.com/-nxF0eT1U3qQ/VAY-5mA30KI/AAAAAAAAAAg/aQ6Sqk53Fp8/s1600/Block%2BMesh.jpg';return
true;"
onclick="this.href='https://lh4.googleusercontent.com/-nxF0eT1U3qQ/VAY-5mA30KI/AAAAAAAAAAg/aQ6Sqk53Fp8/s1600/Block%2BMesh.jpg';return
true;"><img moz-do-not-send="true"
origsrc="https://lh4.googleusercontent.com/-nxF0eT1U3qQ/VAY-5mA30KI/AAAAAAAAAAg/aQ6Sqk53Fp8/s320/Block%2BMesh.jpg"
border="0" height="307" width="320"></a></p>
<div><br>
</div>
<div>Erroll</div>
<div><br>
On Tuesday, September 2, 2014 1:28:00 PM UTC-7, Omid
Mahabadi wrote:
<blockquote class="gmail_quote"
style="margin:0;margin-left:0.8ex;border-left:1px
#ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000"> Hi Oliver,<br>
Thanks for your response. I had also tried the
variation that you sent me. The issue is that I
don't want to have the flat surface that is
interfacing the two volumes. I'd like the mesh
to be continuous across that interface.<br>
<br>
Also, when following your suggestion, I still
cannot get the same exact mesh as you did.
Please see the attached screenshot. <br>
<br>
Is there any other thoughts on how to get the
results I'm aiming for?<br>
<br>
Thank you,<br>
Omid<br>
<br>
<div>On 14-08-28 06:34 PM, Oliver Willekens
wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<div>
<p style="margin:1.2em 0px!important">You
could delete the volume of the cylinder
you’ve created by means of extrusion and
then delete one of the cylinder’s flat
surfaces using the <code
style="font-size:0.85em;font-family:Consolas,Inconsolata,Courier,monospace;margin:0px
0.15em;padding:0px
0.3em;white-space:pre-wrap;border:1px
solid
rgb(234,234,234);background-color:rgb(248,248,248);border-radius:3px;display:inline">Delete</code>
command. However, it won’t give you what
you want, because the box “holding the
cylinder” will be unaware of the
presence of the cylindrical hole.</p>
<p style="margin:1.2em 0px!important">I
tried this:</p>
<pre style="font-size:0.85em;font-family:Consolas,Inconsolata,Courier,monospace;font-size:1em;line-height:1.2em;margin:1.2em 0px"><code style="font-size:0.85em;font-family:Consolas,Inconsolata,Courier,monospace;margin:0px 0.15em;padding:0px 0.3em;white-space:pre-wrap;border:1px solid rgb(234,234,234);background-color:rgb(248,248,248);border-radius:3px;display:inline;white-space:pre;overflow:auto;border-radius:3px;border:1px solid rgb(204,204,204);padding:0.5em 0.7em;display:block!important;display:block;padding:0.5em;color:rgb(51,51,51);background:none repeat scroll 0% 0% rgb(248,248,255)">Plane Surface(1) = {1, 2}; // square minus the circle
out1[] = Extrude {0.0, 76.2, 0.0}{Surface{1};};
Plane Surface(2) = {1};
out2[] = Extrude {0.0, -76.2, 0.0} {Surface{2};};
</code></pre>
<p style="margin:1.2em 0px!important">Which
results in the 2D mesh you find in the
attachment. Perhaps this is what you’re
looking for?</p>
<p style="margin:1.2em 0px!important">I
also tried combining those two volumes
using <code
style="font-size:0.85em;font-family:Consolas,Inconsolata,Courier,monospace;margin:0px
0.15em;padding:0px
0.3em;white-space:pre-wrap;border:1px
solid
rgb(234,234,234);background-color:rgb(248,248,248);border-radius:3px;display:inline">Compound
Volume(4) = {out1[1], out2[1]};</code>,
but like you, I got GRegion Compound
errors. Probably some basic restriction
from triangulations I’m overlooking.
This only means your 3D meshes will be
clearly stopped at a flat interface
about half-way through those two boxes,
but you’ll still have a 3D mesh. I was
hoping that the Compound Volume would
make some tetras across this boundary
though… But with the above lines, you’ll
have a working mesh.</p>
<div
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b2JhYmx5IHNvbWUgYmFzaWMgcmVzdHJpY3Rpb24gZnJvbSB0cmlhbmd1bGF0aW9ucyBJJ20gb3Zl
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c3RvcHBlZCBhdCBhIGZsYXQgaW50ZXJmYWNlIGFib3V0IGhhbGYtd2F5IHRocm91Z2ggdGhvc2Ug
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aXMgYm91bmRhcnkgdGhvdWdoLi4uIEJ1dCB3aXRoIHRoZSBhYm92ZSBsaW5lcywgeW91J2xsIGhh
dmUgYSB3b3JraW5nIG1lc2guPGJyPgo8ZGl2Pjxicj48L2Rpdj4="
style="min-height:0;font-size:0em;padding:0;margin:0"></div>
</div>
</div>
<div><br>
<br>
<div class="gmail_quote">2014-08-28 17:08
GMT+02:00 Omid Mahabadi <span dir="ltr"><<a
moz-do-not-send="true">omid.m...@geomechanica.com</a>></span>:<br>
<blockquote class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px
#ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
Hi Christophe and Gmsh team,<br>
I've been trying to model a simple
cube with a cylindrical hole that is
NOT through-going (i.e., its depth is
smaller than the depth of the cube),
as shown in the attached picture. The
Extrude command doesn't seem to work
since it will extrude both surfaces
(exterior and interior -- hole) at the
same time. I know I can define all the
surfaces, surface loops, and volumes
manually, but is there a better way of
defining something like this in Gmsh?
<br>
<br>
I also tried to use the Compound
Volume command by first defining two
volumes from Extrude and then trying
to combine them but I'm getting errors
for the Compound Volume visualization
(Error: Cannot evaluate bounds on
GRegion Compound) and when I mesh the
geometry, the actual shared interfaces
are still existing, although by the
notion of compound from the
documentation, the internal interfaces
should be neglected. Here is the
geometry file:<br>
<blockquote>// Characteristic length
(==> element size)<br>
cl_external = 25;<br>
cl_excavation = 5;<br>
<br>
// External boundaries<br>
Point(1) = {-127, 0.0, -127,
cl_external};<br>
Point(2) = {+127, 0.0, -127,
cl_external};<br>
Point(3) = {+127, 0.0, +127,
cl_external};<br>
Point(4) = {-127, 0.0, +127,
cl_external};<br>
Line(1) = {1, 2};<br>
Line(2) = {2, 3};<br>
Line(3) = {3, 4};<br>
Line(4) = {4, 1};<br>
Line Loop(1) = {1, 2, 3, 4};<br>
<br>
// Excavation boundaries<br>
Point(5) = {0.0, 0.0, 0.0,
cl_excavation};<br>
Point(6) = {19.05, 0.0, 0.0,
cl_excavation};<br>
Point(7) = {0.0, 0.0, 19.05,
cl_excavation};<br>
Point(8) = {-19.05, 0.0, 0.0,
cl_excavation};<br>
Point(9) = {0.0, 0.0, -19.05,
cl_excavation};<br>
Circle(5) = {6, 5, 7};<br>
Circle(6) = {7, 5, 8};<br>
Circle(7) = {8, 5, 9};<br>
Circle(8) = {9, 5, 6};<br>
Line Loop(2) = {5, 6, 7, 8};<br>
<br>
//Using compound volumes<br>
Plane Surface(1) = {1};<br>
out1[] = Extrude {0.0, 76.2,
0.0}{Surface{1};};<br>
<br>
Plane Surface(2) = {1};<br>
out2[] = Extrude {0.0, -76.2,
0.0}{Surface{2};};<br>
<br>
Compound Volume(3) = {1, 2};<br>
</blockquote>
<br>
I also tried to create the geometry in
CAD software and imported it as iges,
brep or step formats but for reason
the hole is not there completely. See
for instances the iges file attached.<br>
<br>
Can you kindly shed some light here?
Am I doing something wrong? Or are
there Gmsh tricks/commands that I can
use to achieve my goal?<br>
<br>
Thank you,<br>
Omid<span><font color="#888888"><br>
<br>
<pre cols="72">--
Omid Mahabadi, Ph.D.
Geomechanica, Inc.
<a moz-do-not-send="true" href="http://www.geomechanica.com/" target="_blank" onmousedown="this.href='http://www.google.com/url?q\75http%3A%2F%2Fwww.geomechanica.com%2F\46sa\75D\46sntz\0751\46usg\75AFQjCNF6W3NuiF8qST2qDZz4P5VNTQsiVw';return true;" onclick="this.href='http://www.google.com/url?q\75http%3A%2F%2Fwww.geomechanica.com%2F\46sa\75D\46sntz\0751\46usg\75AFQjCNF6W3NuiF8qST2qDZz4P5VNTQsiVw';return true;">http://www.geomechanica.com/</a>
Tel : <a moz-do-not-send="true" value="+16474789767">+1-647-478-9767</a>
Cell: <a moz-do-not-send="true" value="+14168242408">+1-416-824-2408</a>
</pre>
</font></span></div>
<br>
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<br>
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<br>
-- <br>
Oliver Willekens<br>
PhD Student <br>
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</blockquote>
<br>
<pre cols="72">--
Omid Mahabadi, Ph.D.
Geomechanica, Inc.
<a moz-do-not-send="true" href="http://www.geomechanica.com/" target="_blank" onmousedown="this.href='http://www.google.com/url?q\75http%3A%2F%2Fwww.geomechanica.com%2F\46sa\75D\46sntz\0751\46usg\75AFQjCNF6W3NuiF8qST2qDZz4P5VNTQsiVw';return true;" onclick="this.href='http://www.google.com/url?q\75http%3A%2F%2Fwww.geomechanica.com%2F\46sa\75D\46sntz\0751\46usg\75AFQjCNF6W3NuiF8qST2qDZz4P5VNTQsiVw';return true;">http://www.geomechanica.com/</a>
Tel : +1-647-478-9767
Cell: +1-416-824-2408
</pre>
</div>
</blockquote>
</div>
</div>
</blockquote>
<br>
<pre cols="72">--
Omid Mahabadi, Ph.D.
Geomechanica, Inc.
<a moz-do-not-send="true" href="http://www.geomechanica.com/" target="_blank" onmousedown="this.href='http://www.google.com/url?q\75http%3A%2F%2Fwww.geomechanica.com%2F\46sa\75D\46sntz\0751\46usg\75AFQjCNF6W3NuiF8qST2qDZz4P5VNTQsiVw';return true;" onclick="this.href='http://www.google.com/url?q\75http%3A%2F%2Fwww.geomechanica.com%2F\46sa\75D\46sntz\0751\46usg\75AFQjCNF6W3NuiF8qST2qDZz4P5VNTQsiVw';return true;">http://www.geomechanica.com/</a>
Tel : +1-647-478-9767
Cell: +1-416-824-2408
</pre>
</div>
</blockquote>
</div>
</div>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
Omid Mahabadi, Ph.D.
Geomechanica, Inc.
<a class="moz-txt-link-freetext" href="http://www.geomechanica.com/">http://www.geomechanica.com/</a>
Tel : +1-647-478-9767
Cell: +1-416-824-2408
</pre>
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