ANSYS workflow is a little different. You dont actually need to supply the mesh file to the converter - it writes out an APDL script that will search for the mesh and closest nodes automatically.
So you would need to generate your APDL scripts and call them from ANSYS once you constructed your mesh, but keep in mind that the ref. frame should be consistent just like in Abaqus.
Regards,
Pavel
Sir,
You want to say that first i open clavicle base file in ansys and set coordinate system as given in tutorials. Sir from where i can get that .txt file taht you mentioned ,is it get export from ansys?
Thanks
Mohit,
Please try doing the tutorial - open all files, read through what is being generated by the converters. Typically it is enough for our users.
Regards,
Pavel
Sir
i have been done all step as given in tutorials.I Genearate .xml file in files_in folder. Last step of this which i think is below-
One thing you have to change right now is the path to your FE model.
RESUME,âclav_baseâ,âdbâ,âC:\Users\sd.ANYBODY\TEMP\Clavicle_paper\FEâ,0,0
Please include the path to your model.
Iam unable to getting above point .Im unable to get apdl template by applying convertor. Is any coding remain beolw-
AnyOperationShellExec ConvertToAPDL={
Show=On;
FileName = âAnyFE2APDL.exeâ;
Arguments = â-i âŚ\files_in\clavload.xml -o âŚ\files_out -t âŚ\APDLTemplate.txtâ;
WorkDir=âC:\Users\ADMIN\AppData\Roaming\AnyBody Technology\AnyBody.6.0.x\AMMR.v1.6.2-MyDemo\Application\Examples\StandingModel\Converterâ;
};
Thanks.
Hi sir
i got the five files. I open them one by one in ansys, but file is not opening in ansys.It giving following errors that check yours files-
using one iteration per subset may result in unconverged solution for non linear analysis and program may not indicate divergence in this case. Please check your results.
Sir in every file when i try to open is giving same error.
THANKS.
It simply means that you are using a single time step for your loadcase, which tells you that it might not be a good analysis option. I believe these are warnings, but not errors. How does the picture look like? Do you see muscle attachments as "spider web"s?
P.
Hi Sir,
My ansys software get out of order.I i did all tutorials of fea interface of abaqus with left femur (exported anybody model without scaling1000). Prepare mesh in 3 matic and export loads.In this i totally sure there is no problem of unit mismatch also i did analysis in abaqus (assuming loads and boundary conditions) without anybody loads. Results are good. When i export the loads by anybody i check everything, all seems to ok, eg alignment.xml file, .inp file, muscle attachment points,values of loads etc. But still results are same.I check the loads which are ok that should not bend the femur like that. So as you said there may be error in fea task, but i see in the tutorials of abaqus interface that we have to do nothing in the abaqus rather than applying materials properties,which i think not problem because i already check without anybody loads.So Sir question is that we are not doing not much in abaqus so how the error may be of fea task?
One thing more about the constraints editing as shown in tutorials, i not doing like that(to the outermostpoint) ,as you cleared already that is for editing surfaces,because i have only a femur in this.I want to share all files with you. Could you check in ansys that results will match or not? Im attaching the results of abaqus.Im exporting loads from standard standing model.
Im using materails properties like Young modulus 20e9. poisson ratio=.4 density 1600
Thanks.
Hi Sir
I am still struggling in this problem. I think that there may be the problem of the application of the constraints. Could you suggested me that how can i verify that constraints applied by anybody is ok or not .One more thing there are 172 constraints and loads in my model,is it ok because i think there may be more muscles loads are exporting from standing human model thats why this bending is occurring.
Thanks.
Hi Mohit,
Sorry, I have been busy.
I would take all constraints as they are and try to do a +1 test.
You can remove all the loads and add them back one by one to see which one causes this large bending. Even though looking at all of them I still do not see large enough values. Try starting by the joint loads.
Have you checked that the output is not visually scaled to highlight the change?
If not - try making simpler configurations of the same thing and understand where the problem comes from?
The number of forces seems to be ok - i do not think you should have more than that. I have tried the same analysis many times and all worked for me - the number 172-3 rings a bell.
Regards,
Pavel
Hi Sir
Thanks for reply. Sir i did same as you said in previous post. This thing i did already in abaqus. I Suppress half of loads out of 172 than the results seems to ok and no bending exist and then i gradually unsuppressed the loads and bending increases gradually.So sir if i found that loads which causes bending or may be set of loads so i should remain them unsuppressed or i have to reduce that loads values?
Thanks.
Please send the block of code for material properties.
Regards,
Pavel
Ok sir
Youngs modulus E= 21e9 n/m^2
Poisson ratio=.3
Density=1600kg/m^3
I need the code for this definition as a double check that you do it right.
Regards,
Pavel
Sir i apply these material properties in abaqus not in anybody, Are you saying about the anybody codings for above problem?
I am saying that I want to check how you apply the material properties and consistency of units. Please generate an Abaqus input deck that contains the material property section.
AnyBody loads are very-very low (i did not see moments of more than 1Nm) and do not seem to be the problem. Most likely, as i said many times, the problem is in the material properties.
For example, femur can be loaded to very large bending moments before it has a risk of fracture.
example
In your case it looks too elastic. It is either the mat properties problem, or visualization of the results. Please check that you do not have the deformation magnification switched on when you view the results. Some FE packages scale up the deformations to highlight the low displacements.
Regards,
Pavel
Sir,
i am showing the materials properties detail below and also attaching the full file for abaqus input with material properties. I used Newton per meters unit in the all procedure.
*Amplitude, name=AMPL_MUSCLESSPINELEFT_PSOASMAJOR_PML1I_TM_3
0., -0.540962, 2., -0.540961
*Amplitude, name=AMPL_MUSCLESSPINELEFT_PSOASMAJOR_PML2I_TM_1
0., 7.358236, 2., 7.358232
*Amplitude, name=AMPL_MUSCLESSPINELEFT_PSOASMAJOR_PML2I_TM_2
0., 11.815199, 2., 11.815197
*Amplitude, name=AMPL_MUSCLESSPINELEFT_PSOASMAJOR_PML2I_TM_3
0., -1.794359, 2., -1.794359
*Amplitude, name=AMPL_MUSCLESSPINELEFT_PSOASMAJOR_PML3I_TM_1
0., 5.16058, 2., 5.160578
*Amplitude, name=AMPL_MUSCLESSPINELEFT_PSOASMAJOR_PML3I_TM_2
0., 8.030151, 2., 8.030149
*Amplitude, name=AMPL_MUSCLESSPINELEFT_PSOASMAJOR_PML3I_TM_3
0., -1.13897, 2., -1.13897
*Amplitude, name=AMPL_MUSCLESSPINELEFT_PSOASMAJOR_PML4I_TM_1
0., 1.648032, 2., 1.648031
Amplitude, name=AMPL_MUSCLESSPINELEFT_PSOASMAJOR_PML4I_TM_2
0., 2.433172, 2., 2.433171
Amplitude, name=AMPL_MUSCLESSPINELEFT_PSOASMAJOR_PML4I_TM_3
0., -0.297545, 2., -0.297545
**
[b] MATERIALS
**
*Material, name=Material-1
*Density
1600.,
*Elastic
2.1e+10, 0.3[/b]
** ----------------------------------------------------------------
**
** STEP: Step-1
**
*Step, name=Step-1, nlgeom=NO
*Static
0.1, 2., 1e-05, 1.
**
** LOADS
**
** Name: CFORCE-1 Type: Concentrated force
*Cload, amplitude=AMPL_LEG_MUS_PECTINEUS2_1
NS_LEG_MUS_PECTINEUS2_1, 1, 1.
** Name: CFORCE-2 Type: Concentrated force
*Cload, amplitude=AMPL_LEG_MUS_PECTINEUS2_2âŚ
Thanks.
Hi Sir
I think it was a problem in the visualization of the results. I open the deformation scale in the abaqus. There was three options 1. auto compute 2 uniform and third non uniform.
It was auto compute(711.3 N) was selected during that deformed results.Then i select uniform deformation scale with value 1 then results seems to very okk.
But still i want to confirm the maximum stress values is ok or not. It was showing 4.811e+06 and minimum 6.901e+1. I want to confirm that is it reasonable values for that loads which you checked already.I have doubt that this stress value is too large.
Thanks.
Yes, the material properties did look ok, so I was about to suggest to check the visualization to exclude this problem too.
So i think you get good results. But there might, of course, be some stress concentration due to mesh imperfections or the way the constraints are created - please have a look at the stress distribution and highlight the peaks. You might find something around the knee/hip joint - fix to that would be to change the constraint surface from âanybodysurfacesetâ to the expected area of contact. For example, distal surface of the femur and the femoral head area in contact with the pelvis.
Try to visualize the âspider webâ constraints and check how it looks like - you might see something and if not try to show a couple of screenshots.
Regards,
Pavel
Sir
Visaulization of the results was over mistake abaqus team has also tell us. But
In my study maximum stress is approximately 4.3 mpa. I study a research paper downloaded from anybody website combined finite element and multibody musculoskeletal investigation of a fractured clavicle with reconstruction in this paper maximum stresses on the plate is around 220 mpa and on the bone is 20 mpa during the eating activity. Sir in my case maximum stress value is only 4.3 mpa. So thats why i asking from you is it reasonable or not.I think this too small.
Im also attaching some snapshots of constraints.please suggest me which area is to be edited?
Thanks.
Mohit,
it is not really valid to compare single peak values - you should probably compare averaged values, take into account level of loading, elastic moduli, physical activities used for those study - relate them to your physical activity, etc. + The physical activity that you are modelling is pure standing, so the load is not huge.
Regards,
Pavel