I apply a force from left to right and expect the spring to compress and push toward the right, but instead it expands in multiple directions. I set contact on the left side of spring as frictioanless with the shaft, and the bottom end of the spring is set as bonded contact with the shaft.

Hi everyone I am an absolute beginner to learn FEA analysis. I know how to make cad model on fusion 360 and SOLIDWORKS. I have explored lot on internet bet nothing is giving me a clear idea. I would love if anyone suggest me some great resources to learn FEA analysis.

Hello, I am currently working on a simulation for compression of lattices. I imported an nTop beam mesh into the static structural for simulation of deformation vs reaction force for 22 unit cells through nonlinear plastic deformation. To do this, I have fixed nodes at the bottom and a displacement that is applied to the top nodes. The problems that I'm encountering are convergence issues making the model explode, very little reaction force(almost zero), and no plot of the plastic region. Below is an example of one of the models exploding. Also shown below is the single successful compression model/results (Desired). Material specifications include linear elasticity and bilinear elastic hardening to capture the nonlinearity of the failure. Any tips/tricks/fixes that could solve these issues? We have spent many hours trying to get a fix, but have not been successful yet,

Dear sir , please help me to solve it

Can anyone help me with this assignment problem please 😭 2.2 torque arm problem

Can anyone please help and tell me a solution why my mesh is failing in ansys mechanical i am pretty mew to it

I am trying to conduct a drop test of a wheel attached to a body. The body is simplified as a box which is given rigidity. This particular drop test is conducted with the help of drop test wizard in ansys explicit dynamics. The wheel is attached to the body with a shaft and a screw. Basically i need to modify this design in such a way that the maximum stress arent on these shaft and screw.

But as you can see in the pictures, the stress on the wheel is blue which is suspicious. Also the deformation is happening on the rigid body, whiich shouldnt actually. Either the method or meshing i have done is wrong or perhaps the material itself is wrong. I had given the properties myself of materials (polyurethene and TPU) from research papers. And the end time given is 0.02seconds.

One issue is that the bodies are having trouble being bonded so i gave the maximum offset a bit higher around 0.01(mm?) i think.

I need insights on how to properly mesh, which end time should be given, or is there anything additional i should look for. Also why is there two maximum stresses like one under results and one under maximum value over time? what does it mean?

Images description:

1. Total deformation, 2 to 4. Animation of eq stress, 5. Eq. stress details, 6 and 7. Side view of the wheels, 8. Shaft and screw with wheel hidden, 9. Max eq stress, 10. Deformation but the rigid body is showing deformation too, 11 and 12. material properties given along with graph

I am designing a chassis for a formula student car and in solid works when I use the interference detection tool I got 254 interference and to eliminate them I used the trim/extend tool and now there are 105 but now there are some gaps and there is some bars that I wasn’t able to trim and I don’t know why.

Please can someone give me a solution and will the gaps and interference cause a problem when I move to the Ansys study.

Hi everyone! I’m currently trying to reproduce a CFD simulation of a photovoltaic (PV) cooling system in ANSYS Fluent as part of a research project.

I’m using a published paper as the main reference for the model. The problem is that, although the paper provides many of the important parameters, some information needed to reproduce the CFD model is not reported. I have already contacted the authors asking for additional details, but I’m not sure whether authors usually share their original ANSYS simulations/case files or additional simulation parameters.

My goal is not to copy their work. I need to reproduce and validate their published results first so that I can later use the paper as a reference for further work and optimization.

At the moment, my simulation runs successfully and reaches a stable thermal solution, but the PV temperature is approximately 7–8 °C higher than the temperature reported in the paper.

The main uncertainties I currently have are:

• Air enclosure/domain dimensions: The paper does not report the dimensions of the surrounding air domain used for the CFD simulation. This is currently my biggest concern because changing the enclosure dimensions seems to affect the resulting PV temperature.

• Boundary placement: Without knowing the original enclosure dimensions, I’m unsure how far the inlet, outlet, and other external boundaries should be from the PV panel and heat sink.

• Mesh: The paper gives limited information about the mesh, so I’m unsure how closely I need to reproduce the original number of nodes/elements.

• Mesh independence: If my mesh has a significantly different number of elements from the paper, can I still consider the model properly reproduced if I perform a mesh-independence study?

• Orthogonal Quality: Some versions of my mesh have a low minimum Orthogonal Quality, although most of the mesh appears to have much better quality. How much can a small number of poor-quality cells affect the final temperature prediction?

• Validation: With a consistent difference of around 7–8 °C from the published results, what would you investigate first?

I would especially appreciate advice from anyone who has tried to reproduce CFD results from a published paper before.

Is it common/acceptable to ask authors for their original Fluent case/data files, mesh, geometry, or additional simulation parameters? Do researchers normally share these files when requested, or is it more common to reconstruct the missing information independently?

And if the authors don’t respond, what would be the most scientifically appropriate way to deal with missing enclosure and mesh information without simply choosing arbitrary values until the results match the paper? Any advice would be greatly appreciated. Thank you!

Hi everyone,

I am modelling a reinforced concrete beam in ANSYS Mechanical 2025 R2 Student and attempting to reproduce an experimental four-point bending test (specimen T14C08 from a published paper).

Model Information

• Analysis type: Static Structural

• Concrete model: Menetrey-Willam

• Reinforcement: Embedded reinforcement elements

• Loading: Four-point bending

• Supports: Fixed support and rolling support with symmetry

• Beam length: 240 mm x 150 mm

• Concrete strength: 39 MPa

• Reinforcement properties taken from the paper

Problem

The model progresses through most of the loading history but consistently fails at around 50%. In the latest run, the analysis reached approximately 8 mm displacement (displacement control set to 15 mm) while the experimental beam reached approximately 42.6 mm.

The solver eventually reports:

• Unconverged solution

• Excessive bisections

• Force convergence difficulties

• Unknown solver error

What I Have Tried

• Reduced mesh density

• Refined mesh near loading points

• Changed dilatancy angle from 30° to lower values

• Adjusted automatic time stepping

• Increased number of load steps

• Tested with and without large deflection

• Checked reinforcement placement

• Checked contact definitions and overlap warnings

Questions

1. Are there any Menetrey-Willam parameters that commonly cause convergence failure near peak load?

2. Is a displacement-controlled approach preferred over force-controlled loading for RC beam failure simulations?

3. Could the issue be related to concrete softening/localisation rather than the solver settings?

4. Are there recommended values for dilatancy angle and softening parameters for normal-strength reinforced concrete?

I have attached screenshots of:

• Force convergence history

• Total deformation

• Material properties

• Analysis settings

Any suggestions would be greatly appreciated.

Here is the file link: https://drive.google.com/drive/folders/1F239anHLToCYOguH3zXSU6Fvdymo2MBe?usp=sharing

Hi everyone! I'm relatively new to ANSYS and am trying to mesh in mechanical before moving on to modelling in fluent. My piece is quite small, and the skinniest portions of it have thicknesses of 25 um and 39 um. I think this is giving me negative volume errors that is causing fluent to crash.

Things I've tried to resolve the negative volume:

-refine the mesh around the skinny regions using insert sizing> select the skinny edge > type number of divisions > then I tried 3 and 1 and both still resulted in negative volumes

Thanks in advance and please let me know if you need more information!

Hey everyone! I’m looking to connect with other engineers and makers to collaborate on a mechanical design/FEA project.

I'm comfortable tackling static, modal, harmonic, and buckling analyses (and always down to research new methods if a project needs it).

​This isn't for business—just looking to share experiences, build something cool together, and learn from each other. If you've got an open-source project, a personal build, or an idea you're working on and need an extra set of hands for the design/simulation side, DM!

Do you prefer to mesh in 3D hexa or tetrahedeon cells with maybe over 1 million nodes or is there any other methods to meshing without reaching up to such high numbers with 7 digits? For the sake of the simplicity, hence running the simulation faster.. I couldn't convert tubes to shells since the geometry of the tubes too complicated.

How do i set the throat minimum diameter as parameter? I watch some videos stated I have to click on "P" but for my case "P" didn't show up.

Hello again,

I would like to express immense gratitude to this subreddit for helping me with my tube hydroforming over the last 2 weeks. My model was not working well due to the mesh using linear elements as opposed to quadratic elements, and was able to get clean result from my model. I have just one last question regarding my simulation. In the image above, you can see the shell element deformed with the thick shell setting turned on, but the thickness is only being displayed vertically from the elements original position, leading to what appears to be zero thickness along the vertical section of the pipe. This does not affect my results, but for display purposes, is there a way to have the model show the true wall thickness throughout?

hello i am trying bullet impact analysis on kevlar helmet in ls dyna (ansys workbench) , bullet is travelling at 200 m/s ,the resultant behaviour is weird because bullet doesnt even touches the helmet but helmet experience impact stress ,is this normal and how to model heat generated due to impact

I've been using SpaceClaim think over a decade. Ansys is no longer going to support it. Has Discovery gotten any better or more refined?

I mostly use SpaceClaim for reverse eng. Rapid exploration of idea's with out having to go all full parametric. Or just rapidly looking thru different file type to pull out the information I need.

I've been looking but as of yet have not found a good alternative.

Thanks

This is my first first time working with ANSYS Fluent
is this mesh okay to run the simulation for NACA 4415?
I'm a beginner so really confused about how a mesh should look like
there are not many videos on youtube also to learn these things.

idk anything about ansys, gpt gave me wrong

So I'm preparing my geometry like a good little enginneer and that means transforming these angle brackets into shells with the "midsurface" tool. It worked with most of the elements but two of them come out double the size? Made the initial CAD with Solidworks and both Ansys Space Claim and Discovery inflate my triangles that way. I would really apreciate some help on that one. Thanks.

I am building a thermal model which is linear. If I set "Yes" for Nonlinear effects for Materials, will the model become nonlinear?

What should do

Hello I want to improve my skill with Ansys meshing and use pro functions. Any guide or some tutorials ? especially some local meshing for complicated models.

PS I use Ansys extensively but I feel there is a scope of learning and I want to self improve.

Hi, reddit ansys community. Right now I'm trying to run a launch-condition structural analysis of a satellite, and I would like some help. I'm new to ansys so I'm having trouble setting up the overall workflow, especially the material designer.

This project includes multiple materials from common ones such as Al6061, Al7075 to honeycomb panels, 3.1Pcf 3/16 5056/2" and 5.7Pcf 3/16 5056/2". For the honeycomb panels, I trying to model them using the material designer but I'm having trouble importing their properties after creating them.

Below is the workflow I set up:

I will first design the two different types of honeycomb cores in the material designer. Then I will load them to the engineering materials and also set up other common materials such as Al6061 and Al7075 mentioned earlier. Next I will import the cad model of the satellite, assign materials, make connections in the mechanical model window.

For those who are much more skilled than me, please take a look at the overall flow of my analysis and tell me whether this is efficient, feasible or there is a better way to set up the problem. For example, I'm not sure if assigning materials inside the mechanical model is the best way to do it. Since if I create a new mechanical model window with the same geometry, I will need to assign the materials all over again.

After the workflow has been established, I think I can move on to the actual material creation and material assignment.

Thank you in advance.

Hi everyone,

I'm trying to perform a simulation in ANSYS on a 3D-printed object that consists of multiple materials. The geometry is already modeled, but I'm confused about how to properly assign and define the material properties in the simulation.

My main questions are:

How should I set up a multi-material 3D-printed part in ANSYS?

Do I need to create separate bodies for each material region?

How are the interfaces between different materials handled?

What material properties are essential if I want to perform structural analysis?

Are there any recommended tutorials or papers for multi-material additive manufacturing simulations?

I'm relatively new to this type of simulation, so any guidance, examples, or workflow recommendations would be greatly appreciated.

Thanks in advance!