Learning Forum

[emmanuel_amoako_00]

Hello,

Please am using the Additive Manufacturing extension and in the open wizard under the build settings for simulation, there is number of heat sources in the menu however there is no laser power or wattage and wanted to find out if the heat source is linked to the laser power.

[Sandeep Medikonda]

Hi Emmanuel,

  In workbench additive, the laser power is not directly input but instead back-calculated based on the energy density. Which is then calculated based on some of the other input parameters such as temperature, laser scanning speed etc. So when the scanning speed is increased, the energy density is decreased (Tian et al. 2008, page 1905-1906).

Regards,

Sandeep.

 

[emmanuel_amoako_00]

Hello Sandeep,

Please that was very educative, please can I get access to the reference (Tian et al. 2008).

Regards,
Emmanuel 

[Sandeep Medikonda]

Emmanuel,

  I won't be able to download or attach the document due to copyright agreements, but I will try and see if I can get a DOI link, I will post it here and you should be able to access it through your school library.

Regards,

Sandeep

[emmanuel_amoako_00]

Sandeep, 

Thank you very much, I would be very grateful if I get access to the DOI link.

Please can I write my own script or user defined functions in Ansys workbench additive and if yes can I get resources to help me.

Regards,
Emmanuel.

[Sandeep Medikonda]

Emmanuel,

  You can write your own extensions using the ACTs in Python. You can also link them to APDL code if needed.

  See if the following resources help in getting started:

Resource 1

Resource 2

Resource 3

Regards,

Sandeep

[emmanuel_amoako_00]

Sandeep, 

Thank you so much. I will access them and am very sure it will help me get started.

Regards,
Emmanuel.

[Sandeep Medikonda]

Hi Emmanuel,

  You can access the article here.

  Also, I've had a chance to interact with the developer and was told that we don't consider the power of the laser in the calculation. So, we heat the imprinted layer just enough for it to reach the melting temperature. Not more, not less.

  Hope this helps.

Regards,

Sandeep

[emmanuel_amoako_00]

Hello Sandeep,

Thank you for the access to the article, I am very grateful.

Since the developer didn't consider the power of the laser can I develop my own script to use laser power as one of the build setting in the additive manufacturing wizard? I wanted to vary the laser power, scanning speed, hatch spacing and deposition thickness in my work.

Regards,
Emmanuel.

[Sandeep Medikonda]

Emmanuel,

  Yes, you might be able to do that with ACT scripting. I don't think you can change the wizard all that much as you don't have access to the source code.

  Have you considered Additive Print for this? If you select a thermal simulation in Additive Print, you should be able to specify all these machine parameters.

Regards,

Sandeep

[emmanuel_amoako_00]

Hello Sandeep,

I have considered Additive Print, but I dont get the temperature distribution profile as a function of time in the Additive Print and also the materials(316L Stainless Steel and Ti-6Al-4v) under consideration for thermal simulation has not been validated but Workbench 19.0 gives me the access to these materials and gives the temperature distribution profile as well during the build. The only limitation is the laser power in the Workbench 19.0 but I will try the ACT scripting.

Regards,
Emmanuel.

[DBStudent92]

Hi Emmanuel,

did you solved the laser temperature problem in ANSYS Workbench? How is the relation between laser temperature and laser power?

I have the same problem and would be very grateful if you explain it to me.

Thanks

 

[Hasan Ilker ÇELİKER]

hello, how can we enter the energy density? i clicked the links above but they are all dead links