Iso surface in SLM

DP_Pham · June 20, 2024, 21:32

Dear all,

I am dealing with SLM process, I get problem that when the laser irradiate on the powder, the iso-surface moves up as I shown in the figure. Does anyone have any advices to solve this problem?

Thank you all.

Martin_Sz · June 27, 2024, 02:03

Iso-surface movement during SLM simulation in ANSYS can be caused by several factors. Here are some potential causes and solutions to consider:
* Inaccurate Melt Pool Dynamics: The melting behavior of the powder might be misrepresented in your simulation. Calibrate your material properties, laser power settings, and melt pool viscosity to better reflect reality.
* Meshing Issues: A coarse mesh might not capture the melt pool dynamics accurately. Refine your mesh, particularly around the laser-powder interaction zone, to improve precision.
* Unstable Time Stepping: Large time steps can lead to numerical instability and inaccurate results. Reduce the time step size in your simulation for better stability.
* Evaporation Modeling: If your simulation includes evaporation effects, ensure the evaporation rate is set realistically to prevent excessive removal of material.
By carefully examining these potential causes and implementing the corresponding solutions, you can improve the accuracy of your SLM simulation and address the issue of iso-surface movement.
More at link below

https://howtooansys.blogspot.com/202...eshooting.html

DP_Pham · June 27, 2024, 05:30

Thank you for your kind help.

June 27, 2024, 02:03		#2
Martin_Sz Senior Member Marcin Join Date: May 2014 Location: Poland, Swiebodzin Posts: 313 Rep Power: 13	Iso-surface movement during SLM simulation in ANSYS can be caused by several factors. Here are some potential causes and solutions to consider: * Inaccurate Melt Pool Dynamics: The melting behavior of the powder might be misrepresented in your simulation. Calibrate your material properties, laser power settings, and melt pool viscosity to better reflect reality. * Meshing Issues: A coarse mesh might not capture the melt pool dynamics accurately. Refine your mesh, particularly around the laser-powder interaction zone, to improve precision. * Unstable Time Stepping: Large time steps can lead to numerical instability and inaccurate results. Reduce the time step size in your simulation for better stability. * Evaporation Modeling: If your simulation includes evaporation effects, ensure the evaporation rate is set realistically to prevent excessive removal of material. By carefully examining these potential causes and implementing the corresponding solutions, you can improve the accuracy of your SLM simulation and address the issue of iso-surface movement. More at link below https://howtooansys.blogspot.com/202...eshooting.html __________________ Quick Tips and Tricks, Tutorials FLuent/ CFX (CFD) https://howtooansys.blogspot.com/

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June 27, 2024, 05:30		#3
DP_Pham New Member DP Pham Join Date: Oct 2023 Posts: 5 Rep Power: 2	Thank you for your kind help.