https://preview.redd.it/jx7lyujv7h2h1.png?width=1099&format=png&auto=webp&s=dd95cd5cdd94449b1f11d650175118767426ec8b

Hi, need help for this . some explanation would be good . the data of modal analysis seem wrong, Deformation resulted in 6614.5mm the wing tip is only 700mm.

Hi, I am a beginner in Ansys Mechanical and doing a transient thermal simulation in Ansys Mechanical. As number of steps is large, my PC has insufficient storage to store the temperatures at all nodes for every time step. I only need temperatures at a few nodes for every time step and need to save in a csv file. Are there any methods to do so? I tried "output selection" in "output control" of analysis setting, but it has no effect! Ansys documentation says, it works only for elemental-based results.

I am designing the drive base for a humanoid robot with:

• Two powered wheels (differential drive)
• One caster wheel
• Total robot mass ≈ 50 kg

The drivetrain layout is:

Motor → Coupling → Shaft → Bearings → Wheel

The shaft is supported using two bearings, and the wheel is mounted in an overhung configuration.

Hand Calculation

I calculated the shaft diameter using:

• Combined bending + torsion
• Von Mises failure theory

The overhung distance (distance between wheel center and nearest bearing center) is:

30 mm

Using hand calculations, I obtained:

• Required shaft diameter = 9.13 mm

For safety and manufacturability, I selected:

• Final shaft diameter = 12 mm

My ANSYS Boundary Condition Plan

Now I am trying to validate the shaft using static structural analysis in ANSYS, but I am confused about the correct boundary conditions.

My current plan is:

Loads Applied

1. Apply radial load on the wheel mounting face
2. Apply driving torque on the wheel face

Supports Planned

1. Fixed Support

At the opposite end of the shaft, I was planning to use:

• Fixed support

2. Cylindrical Support

At the bearing locations, I was planning to apply:

• Cylindrical support

with:

• Radial direction = fixed
• Axial direction = free
• Tangential direction = free

My Doubt

Is this boundary condition setup mechanically correct for simulating a shaft supported by bearings in a differential drive robot?

Or should I:

• avoid fixed support entirely?
• use cylindrical supports at both bearings only?
• constrain axial motion at only one bearing?
• model bearings differently?

Thanks.

How do I get the software , without downloading crack and student version.

So I am a second year Masters in Mechanical Eng. and for my thesis I am making simulations about microtablet pressing (like micro pills).

Backstory: I have never used Ansys, have used SW and Creo simulations before, but for my masters I need to use ANSYS. So I am quite new and don't understand a few things in the beautiful UI design of ANSYS.

My problem:

So I started with full on model and got 16 error messages, I thought ok I will try a simpler model, because maybe somewhere a contact is missing or something with geometries are off. So I made a cylinder with three bodies (In SW with split body feature) so I 100% know they are touching. So the upper part is applying pressure (1500Gpa) to the tablet, and the lower part is not moving (aka fixed support). Mechanical simulations are used to to test the geometries of the mold tooling.

So I wanted to know what am I doing wrong, maybe I am just tired and don't know what the hell is happening anymore (working full time as an engineer too...). But yeah maybe someone can guide me onto the right path even with a comment or something. Because I have looked all over the google about the info messages etc. and I have no more left in me lol.

Thanks guys!

https://preview.redd.it/g8hvw6xwk40h1.png?width=1751&format=png&auto=webp&s=fa3071fa6f7c4d8305995fda88e094e5b22a7483

https://preview.redd.it/8v4b97xwk40h1.png?width=1895&format=png&auto=webp&s=f328877e67a7fa67dbd28d4d6a2ddb53ecf579be

https://preview.redd.it/6cfaq8xwk40h1.png?width=1878&format=png&auto=webp&s=165ba7e57c820e1e72cd0c473a6e231f15da0137

Pic 1: simplified model
Pic 2: The real model without the die holder (it holds the split die in place)
Pic 3: With the die holder

I'm running a T-joint indentation analysis with two loading phases:

Step 1: Axial preload on the chord. No prescribed displacement on the brace, but the brace crown point already displaces passively (let's call it UY_residual ≈ -0.9 mm) due to chord deformation.

Step 2: Prescribed displacement applied to the brace top to simulate an indentation punch (-4 mm).

The problem: ANSYS treats the -4 mm as an absolute target. So instead of continuing from -0.9 mm down to -4.9 mm, the node returns to zero first, then goes to -4 mm. This creates a physically incorrect displacement reversal at the start of indentation.

I've tried both Remote Displacement and APDL D command — same issue with both.

What worked: Reading UY_residual via /POST1 + SET, 1, LAST + *GET inside the Step 2 Commands Object, then applying D, ALL, UY, (UY_residual + increment) as the absolute target.

Questions:

Is there a native Mechanical way to prescribe displacement relative to the current deformed state?

Is the /POST1 + *GET approach inside a Commands Object the standard practice for this?

Thanks.

Hello, I’m trying to do a simple ANSYS simulation.

The material is PETG plastic, and I want to see if the structure can handle a ~49 N downward load.

Any help would be appreciated.