XANSYS Forum Index
    Register    

FAQ    Search    Memberlist    Usergroups    SmartFeedSmartFeed    Profile    Log in
Search found 32 matches
XANSYS Forum Index
Author Message
  Topic: Absorbing boundary conditions
v.dayal

Replies: 1
Views: 3890

PostForum: XANSYS   Posted: Thu Aug 06, 2015 4:08 pm   Subject: Absorbing boundary conditions
I am trying to simulate wave propagation in ANSYS but am not able to get rid of the waves reflecting from the boundaries. Anyone knows how to do it?
Thanks

Dr. Vinay Dayal
Associate Professor
Aerospa ...
  Topic: Non-convergence in a large displacement solving
v.dayal

Replies: 11
Views: 11541

PostForum: XANSYS   Posted: Sun Apr 12, 2015 7:14 pm   Subject: [Xansys] Non-convergence in a large displacement solving
How is the elastic plastic curve you have input? After yield, do not make it perfectly plastic. Give it a slope.
Save all the results at each step. Once the convergence is not reached, see at which st ...
  Topic: [Xansys] [XANSYS] [STRUCT] modeling a multilayer/hybrid comp
v.dayal

Replies: 3
Views: 4227

PostForum: XANSYS   Posted: Thu Apr 17, 2014 2:10 pm   Subject: [Xansys] [XANSYS] [STRUCT] modeling a multilayer/hybrid comp
If a layer fails and the load has to be transferred to the surrounding layer, you have to use the birth-death of the elements. The load has to be applied incrementally and at each stage of loading you ...
  Topic: [Xansys] [XANSYS] [STRUCT] modeling a multilayer/hybrid comp
v.dayal

Replies: 3
Views: 4227

PostForum: XANSYS   Posted: Thu Apr 17, 2014 8:19 am   Subject: [Xansys] [XANSYS] [STRUCT] modeling a multilayer/hybrid comp
First of all the values you have provided are not enough. You have to find the properties in all other directions for an orthotropic material.
For the failure criteria input is: Preprocessor->Mater ...
  Topic: [Xansys] Buckling due to Yield stress
v.dayal

Replies: 14
Views: 12249

PostForum: XANSYS   Posted: Wed Apr 16, 2014 12:20 pm   Subject: [Xansys] Buckling due to Yield stress
Buckling is a phenomenon where the out of plane displacement occurs very suddenly. Now under a compression load either the buckling can take place first (elastic buckling) or the material goes into yi ...
  Topic: [APDL] Naming a plot file
v.dayal

Replies: 8
Views: 10572

PostForum: XANSYS   Posted: Thu Oct 10, 2013 12:14 pm   Subject: [APDL] Naming a plot file
In my previous I did not include the line to file creation. Here it is:
*do,i,1,5
*get,nm
/title,Output for %nm%
/image,save,plot%nm%,bmp
*enddo

You will get bmp files

-----Original Message-----
Fro ...
  Topic: [APDL] Naming a plot file
v.dayal

Replies: 8
Views: 10572

PostForum: XANSYS   Posted: Thu Oct 10, 2013 11:30 am   Subject: [APDL] Naming a plot file
Very simple
Say you are in a do loop:
do,I,1,n
*get,name
/title, Output for %name%
..
..
enddo

If name is a parameter then it will be substituted between %name%

Dr. Vinay Dayal

-----Original Mess ...
  Topic: [XANSYS] [STRUC] Earthquake and wind loading
v.dayal

Replies: 1
Views: 2018

PostForum: XANSYS   Posted: Wed Aug 14, 2013 8:44 am   Subject: [XANSYS] [STRUC] Earthquake and wind loading
As a faculty, my response is that this question is not worthy of this User group. You should be able to find the answer in the ANSYS help.

Dr. Vinay Dayal
Associate Professor
Aerospace Engineering De ...
  Topic: How to plot results in grey scale
v.dayal

Replies: 3
Views: 7047

PostForum: XANSYS   Posted: Thu Jun 27, 2013 11:18 am   Subject: How to plot results in grey scale
I want to plot the stresses from the lowest (light grey) to maximum (dark grey). ANSYS mentions that it can be done using the /CMAP and reading an custom color map file. What should the file contain, ...
  Topic: How to plot results in grey scale
v.dayal

Replies: 3
Views: 7047

PostForum: XANSYS   Posted: Thu Jun 27, 2013 8:43 am   Subject: How to plot results in grey scale
I will like to plot the stress contours in grey scale in ANSYS Mechanical APDL .
GUI or APDL help both appreciated.
Thanks

Dr. Vinay Dayal
Associate Professor
Aerospace Engineering Department
1200 Ho ...
  Topic: load application
v.dayal

Replies: 4
Views: 5484

PostForum: XANSYS   Posted: Thu Feb 28, 2013 3:42 pm   Subject: [Xansys] load application
Next time, put your name and affiliation on your email. It is VERY RUDE to just post a question without your name.

In Excel create a csv file. The first column should be F, second the node number, th ...
  Topic: Absorbing Boundary conditions
v.dayal

Replies: 0
Views: 1266

PostForum: XANSYS   Posted: Thu Feb 14, 2013 1:47 pm   Subject: Absorbing Boundary conditions
I am working on the wave propagation in solids but am unable to simulate the absorbing BC in ANYS. I do not want the waves reflecting from the surrounding boundaries to add to the main signals. Anyone ...
  Topic: How to see the through thickness countour at any location !!
v.dayal

Replies: 8
Views: 3198

PostForum: XANSYS   Posted: Tue Jan 22, 2013 12:34 pm   Subject: [Xansys] How to see the through thickness countour at any lo
I would like to point out two operations which are very useful in the type of application you are looking for.
The first is path operation where you can draw a path over the structure and map results ...
  Topic: [Xansys] Composite materials for "dummies"
v.dayal

Replies: 3
Views: 5513

PostForum: XANSYS   Posted: Thu Jun 07, 2012 6:38 am   Subject: [Xansys] Composite materials for "dummies"
Gustavo
I can very well understand about your learning about Composites in a very general way. Unfortunately, there are no books which will fill the need. The question is: Do you want to learn Composi ...
  Topic: Static Structural Simulation Help
v.dayal

Replies: 5
Views: 5330

PostForum: XANSYS   Posted: Tue Aug 09, 2011 8:10 am   Subject: [Xansys] Static Structural Simulation Help
You have an axisymmetric problem.

Generate the two cross-sections. Element type will be axi-symmetric.
Create contact elements between the lines which will come in contact. Contact Wizard in ANSYS ...
  Topic: [Xansys] get max stress value from all sub steps
v.dayal

Replies: 1
Views: 5686

PostForum: XANSYS   Posted: Mon Aug 08, 2011 6:38 am   Subject: [Xansys] get max stress value from all sub steps
Make a text file with these command

*get,N,active,,nset (this will tell you how many sets you have in the results file)
*cfopen,file,txt
*do,i,1,N
set,1,i
plnsol,s,component (In this step you ar ...
  Topic: [Xansys] combining the harmonic results
v.dayal

Replies: 5
Views: 9098

PostForum: XANSYS   Posted: Thu Aug 04, 2011 6:17 am   Subject: [Xansys] combining the harmonic results
In ANSYS you can choose to plot or get the numeric values as amplitude and phase directly.
In analysis options use HROPT DOF printout format Apliitude+Phase
In Time History Process you can then plot ...
  Topic: [Xansys] Large Deflection problem - Convergence issue...
v.dayal

Replies: 3
Views: 5308

PostForum: XANSYS   Posted: Thu Feb 17, 2011 11:11 am   Subject: [Xansys] Large Deflection problem - Convergence issue...
If you are getting convergence in small deflection analysis, try smaller steps and that will help. Your email does not tell how many steps you are using.

Dr. Vinay Dayal
Associate Professor
Assoc ...
  Topic: [Xansys] FW: Use of shell element Shell 63
v.dayal

Replies: 0
Views: 1527

PostForum: XANSYS   Posted: Fri Dec 04, 2009 7:22 am   Subject: [Xansys] FW: Use of shell element Shell 63
In situations like this one has to be creative. Keep the mesh coarse in
the regions where you expect the stresses to be non-critical. In the
critical regions refine the mesh. Now do the refinement may ...
  Topic: LS-DYNA *.k file... how to post-process
v.dayal

Replies: 2
Views: 4643

PostForum: XANSYS   Posted: Fri Aug 14, 2009 12:55 pm   Subject: [Xansys] LS-DYNA *.k file... how to post-process
In your working directory you should have an .rst file. First, go to the
post processor and open this file and read the first set, or any other
set at any time.

Now you can go to the time history pos ...
  Topic: Problem importing iges
v.dayal

Replies: 21
Views: 28000

PostForum: XANSYS   Posted: Wed Aug 12, 2009 12:24 pm   Subject: [Xansys] Problem importing iges
ANSYS develops volumes from the bottom up approach. So the Keypoints and
lines are the most basic entities. If there is any discontinuity in the
lines then the definition of area having a closed set o ...
  Topic: Problem importing iges
v.dayal

Replies: 21
Views: 28000

PostForum: XANSYS   Posted: Wed Aug 12, 2009 9:08 am   Subject: [Xansys] Problem importing iges
Does your SolidWorks has an option to convert to iges for ANSYS? It
works better than regular iges.
When you develop the CAD you have to make the model with least changes.
If you have made frequent ch ...
  Topic: [Xansys] ANSYS 12 CRACK
v.dayal

Replies: 67
Views: 92921

PostForum: XANSYS   Posted: Fri Jul 24, 2009 7:35 am   Subject: [Xansys] ANSYS 12 CRACK
It is not the question of third world or the first world. I would like
to start a consulting business right here in US. I know ANSYS very well
but cannot afford a copy of it. I cannot generate enough ...
  Topic: [Xansys] lsdyna solver *.k , postprocessor
v.dayal

Replies: 0
Views: 1881

PostForum: XANSYS   Posted: Wed Jul 08, 2009 5:45 am   Subject: [Xansys] lsdyna solver *.k , postprocessor
Check the file output options in your gui. The output option is turned
off.
A typical run will have at least the following on (this is from a code I
have run)
Without the rst file you have no output ...
  Topic: [Xansys] Rigid body modes
v.dayal

Replies: 6
Views: 6219

PostForum: XANSYS   Posted: Wed Jul 08, 2009 5:33 am   Subject: [Xansys] Rigid body modes
If seventh natural frequency is 460 Hz, what are the first six? Are they
all close to zero? You can eliminate the rigid body modes by setting the
lowest natural frequency range as a small number, say ...
  Topic: [APDL] Sum a column of an ETABLE
v.dayal

Replies: 1
Views: 1515

PostForum: XANSYS   Posted: Tue May 26, 2009 8:52 am   Subject: [Xansys] [APDL] Sum a column of an ETABLE
Use command SSUM to sum the columns

Dr. Vinay Dayal

-----Original Message-----
From: --email address suppressed-- [mailto:--email address suppressed--] On
Behalf Of aaron.caba
Sent: Tuesday, May 26, ...
  Topic: material properties ?
v.dayal

Replies: 5
Views: 6103

PostForum: XANSYS   Posted: Fri May 08, 2009 7:09 am   Subject: [Xansys] material properties ?
http://www.knovel.com/web/portal/basic_search/display?_EXT_KNOVEL_DISPLA
Y_bookid=754

They have MIL Handbook 5H values digitized.


Vinay Dayal

-----Original Message-----
From: --email address suppr ...
  Topic: Segmentation fault crash
v.dayal

Replies: 5
Views: 4716

PostForum: XANSYS   Posted: Fri Mar 27, 2009 6:22 am   Subject: [Xansys] Segmentation fault crash
This is very standard on systems with limited space like yours on a
University computer system. I see this error all the time. You have run
out of disc space. Solution 1: Got to your working directory ...
  Topic: Parametric analysis with changing input
v.dayal

Replies: 4
Views: 3619

PostForum: XANSYS   Posted: Tue Feb 24, 2009 7:43 am   Subject: [Xansys] Parametric analysis with changing input
Yes, in a research type of work I always use the parametric analysis. We have developed very complicated structures using parametric forms and changed loads, geometry, and properties in the simulation ...
  Topic: [Xansys] Flange Stiffness Analysis
v.dayal

Replies: 11
Views: 8454

PostForum: XANSYS   Posted: Tue Feb 24, 2009 7:19 am   Subject: [Xansys] Flange Stiffness Analysis
No, if there is no load acting at a node then FEA takes the force to be
zero and then calculates the displacement at that point. If you want to
find the force at a node then one has to do some tricks. ...
  Topic: [Xansys] Flange Stiffness Analysis
v.dayal

Replies: 11
Views: 8454

PostForum: XANSYS   Posted: Mon Feb 23, 2009 7:17 am   Subject: [Xansys] Flange Stiffness Analysis
How intricate is the flange and how large it is? Application of the load
has to be correct. A point load or a distributed load can make a
difference.
It would be a good idea to apply the load in steps ...
  Topic: [Xansys] [STRUC] Harmonic Analysis Boundary Conditions
v.dayal

Replies: 4
Views: 5383

PostForum: XANSYS   Posted: Fri Feb 20, 2009 1:43 pm   Subject: [Xansys] [STRUC] Harmonic Analysis Boundary Conditions
Lee
The best way to simulate partial restraint is to attach the feet to the
ground using springs. You can use both linear and torsional springs. A
very low spring constant reaches the condition of fre ...
 
Page 1 of 1
All times are GMT - 7 Hours
Jump to:  


Powered by phpBB © 2001, 2005 phpBB Group

sleek template created by Andrew Charron