What should be the End Time, velocity and other settings in ANSYS Workbench Explicit Dynamics to simulate Quasi-static compression?

Dear Ajay Jayswal ,

When you are simulating quasi-static compression using ANSYS Workbench Explicit Dynamics, it's important to set up the simulation parameters properly to ensure accurate results such as:

End Time: Since you're simulating quasi-static compression, the end time should be set according to the duration of the experiment. If the experiment was conducted at a loading rate of 2 mm/min, you'll need to calculate the total time it took to reach the desired compression and set the end time accordingly. For example, if the experiment took 10 minutes to get the desired compression, you may set the end time slightly longer than 10 minutes to ensure the simulation captures the entire process.

Velocity Boundary Condition: Since the loading rate in the experiment was 2 mm/min, you'll need to convert this to the appropriate velocity boundary condition in ANSYS Explicit Dynamics. You can set the velocity boundary condition to 2 mm/min or convert it to the appropriate units based on your simulation setup.

Other Settings such as Automatic Mass Scaling: It's important to ensure that Automatic Mass Scaling is enabled and properly configured. This feature automatically adjusts the mass scaling factor during the simulation to maintain numerical stability. If it's not working as expected, you may need to change the settings or manually specify a mass scaling factor. Time Step Size: Choose an appropriate time step size for the simulation. Since you're simulating quasi-static compression, you may use larger time steps compared to dynamic simulations. However, ensure that the time step size is small enough to capture the deformation behavior accurately. Contact and Material Properties and Make sure that contact definitions and material properties are properly defined for your structural geometry which includes defining contact pairs, friction coefficients, material properties, etc., to accurately represent the behavior of the materials and interactions between components.

Convergence and Validation: After setting up the simulation, perform convergence studies and validate the results against experimental data if available. This involves refining mesh, adjusting settings, and comparing simulation results with experimental observations to ensure accuracy and reliability.

If Automatic Mass Scaling is not working as expected, you may need to troubleshoot the issue or manually adjust the mass scaling settings. Additionally, consulting ANSYS documentation, forums, or seeking assistance from experienced users may help in resolving specific issues or optimizing simulation settings for your particular case.

I hope this helps you to achieve better results in your quasi-static compression analysis using ANSYS Workbench Explicit Dynamics. If you have any further questions, feel free to ask!

Seyed Reza Jafari

The end time is the maximum time of your simulation (real time) or which you will verify.

In my ipinion, ansyss explicit is so time conuming for 10 min of test and it's better for highly impacted simulation under 1 min. I mostly simulate under 1 sec!

If you need more simulation time, I suggest do it in transient modulus.

Ajay Jayswal

Seyed Reza Jafari Thank you for your response. It is true that the Explicit module takes forever to solve the model.

Would you please share any example, or any other information related to Transient module to solve the problem?

Thank you once again.

Based on what you will simulate is different. Please explain more about your aim with picture in detail.

There are a lot of general transient analysis in youtube.

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