Hot answers tagged

4 votes
Accepted

How to simulate the contact between two distant parts in Ansys workbench?

Okay so I ended up having a play in ANSYS Mechanical Workbench. I did a mock up of your problem. Here's how I've been able to successfully model it. Note that a lot of my decisions are based on the ...
  • 1,217
3 votes

Element order option missing

I dont have a direct solution for your problem but you might want to check your software version. If you are using the student version of ANSYS there might be a difference to the version you are using ...
3 votes
Accepted

How can I reduce the computation time required to simulate a brain tissue penetration model?

Given the subject matter my gut tells me to take the time to compute once you've triple checked your conditions. What material properties are you using? You can alter the mesh to decrease cpu usage as ...
3 votes
Accepted

ansys workbech structural- difference between pressure and surface force application

"Pressure" is always normal to the surface. "Surface force" can be applied in any direction. As example of a surface force that is not normal to the surface would be snow loading on a sloping roof - ...
  • 12.6k
3 votes
Accepted

ANSYS Workbench/Mechanical: Automatically export chart?

There are several options for doing this: If there are only a few values to be saved per design point, you could use 'output parameters'. If there is a lot of data to be saved, the report generator ...
  • 156
3 votes
Accepted

Rayleigh damping in Finite Element Models using beta-coefficient only

The report in your link explains it briefly in the sentence after your quote. The beta term models "structural" or "hysteretic" damping, which is described earlier in the report. The key fact about ...
  • 12.6k
3 votes
Accepted

Using GPU Acceleration in ANSYS Mechanical

I found the answer in the end with a lucky guess: Simply enter "MSAVE, off" into the command line arguments in the advanced solver settings.
  • 498
3 votes

How to determine time taken for tyre to deflate using CFD analysis?

I don't think CFD is the right tool. You can use an orifice equation, say from ASME, to calculate flow rate from inner and outer pressure. This takes the form of: $$\dot{m}=\frac{EC_D}{\sqrt{1-\beta^4}...
  • 476
2 votes
Accepted

What is the script function to select Solid Body in ANSYS Design Modeler?

You can select a single body by this code: agb.AddSelect(agc.TypeBody, bodyname); Here is the script: (Key ideas: First, assign name "GEAR" to the gear body <...
2 votes

Ansys Workbench - adding force in point

So if the point isn't a point on your geometry then you can add a Remote Force. It is in the loads menu. You will then need to choose a Scoping Method and choose the faces/features of your geometry ...
  • 1,217
2 votes
Accepted

Display element coordinate system using Ansys Mechcanical APDL

Under the menu PlotCtrls > Symbols, you can find the following window where the option ESYS Element coordinate sys you are looking for is available. As previously answered, it's also available via ...
  • 200
2 votes

Model Reduction - Export matrices from ANSYS to MATLAB

So my first question would be - Should I build my flexible body with deformation model for each part (say it is a table, should I describe every leg of my table and the plate using rigid body and ...
  • 12.6k
2 votes

modelling truss in ANSYS

To create a pinned jointed truss structure you only need to define the points, which corresponds to the joints, and connect them using using lines that will be meshed with trusses elements. By ...
  • 21
2 votes

How to find the angle of deformation in Ansys APDL?

You can easily get the structural rotation around X axis for a given node (N) using the next APDL command: *get,Parameter_output,NODE,N,ROT,X. You can substitute <...
  • 131
2 votes

Why should I use a contact between two glued bodies in FEA when I can directly merge the mesh nodes between them?

Merging the nodes is equivalent of a continuous body (see welded). Using a contact definition, means that there are two separate surfaces which are connected through a layer/thin film (although this ...
  • 23.6k
2 votes

Non-Linear Analysis Convergence Problem in Ansys

Your model contains a lot of nonlinearities, therefore achieving convergence is not easy. I would try gradually adding each nonlinearity to narrow down where the solver is struggling: turn off large ...
1 vote

How to get laminate stiffness matrices (ABD) in APDL ANSYS?

For standard layered-shell sections, you can obtain submatrices [ A ], [ B ], [ D ], and [ E ] via the SLIST command's FULL option or via the *GET command (Entity = SHEL).
1 vote

Ansys Workbench, defining ambient temperature correctly

the possibility of the simulation going wrong can be in two places. Firstly, you chose the material to be wood, which is not a good conductor. This means heat is more likely to dissipate from the ...
1 vote

How to prove that during loading session of glass container, which will happen first - overstressing or buckling - via FEA?

Many Finite Element programs (such as ANSYS) will comes with several modes for their model. ANSYS comes with a buckling mode as well as a normal stress mode. Simply run the same model in both modes ...
  • 5,333
1 vote

Finding Poisson's ratio of 3D model in ANSYS

Compute the wave velocity in a 3.05-m-diameter steel penstock having a wall thickness of 25 mm if it: i. is embedded in a concrete dam; ii. is anchored at the upstream end; and iii. has expansion ...
1 vote
Accepted

Finding Poisson's ratio of 3D model in ANSYS

Are you asking which of the two equations you give to use? In the context of a continuous material, the first one is flipped; the second is correct. However, since you're trying to apply a materials ...
1 vote

Writing a User Defined Function for Ansys Fluent

You can use only C language for writing UDF. As UDF is an add on customization of Fluent, you have to use C language. Because all APIs are exposed in C language only. For automating ANSYS Fluent you ...
1 vote
Accepted

How to remove a 'mesh edit' item in ANSYS Workbench?

I figured it out. First right click your mesh in the project tree and then click "Clear Generated Data". Then, right click, say your "Node Move", there should be a "Delete", click "Delete", then ...
  • 26
1 vote

Display element coordinate system using Ansys Mechcanical APDL

I think the answer for yor question can be the following command. /PSYMB,ESYS,1 You can find further information in the software, through Help>Mechanical APDL>Command Reference>XVII. P Tamás
1 vote

Streamlines at the boundary of rotating and stationary domains are malformed

Your stationary domain can't incorporate the time/spatial dependency that the turbine blades should induce in them. Suppose there's a region of high velocity flow that trails a turbine blade by 10 ...
  • 1,295
1 vote

ANSYS Mechanical Contact behavior

Just look into the help pages (C:\Program Files\ANSYS Inc\v172\commonfiles\help\en-us\help\wb_sim\ds_Contact_Definition.html). A contact object in ANSYS consists ...
1 vote

ANSYS Workbench - Support type when lifting

I would put a pin through the hole with the proper clearances. The include a contact condition with friction between the pin and the hole. Otherwise the stresses on the lifter will be way off. You ...
1 vote
Accepted

How to represent a load supported at multiple points on multiple beams?

If the vessels (and the load distribution of whatever they're containing) are truly symmetric (or close enough), then yes, you can simply replace them with four equal concentrated loads at the points ...
  • 13k
1 vote

How to compare two ANSYS mechanical APDL databases? (.db or .dbb files)

I don't know if there is a direct method for this. (I suppose you already check command reference PDF). But one possible solution could be run both models and compare both the output txt file. You ...
  • 131
1 vote
Accepted

What limits my Courant number in Implicit Density based Solver?

Analytical stability results for backward-time, centered space (BTCS) discretizations only apply to the first order (linear) hyperbolic partial differential equation. The only reason why they are ...
  • 2,589

Only top scored, non community-wiki answers of a minimum length are eligible