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Pau

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About Pau

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  1. Hello Paulo, Hot tearing is a failure produced because of residual stresses during the solidification. Currently we can't predict this defect but we are working on a thermo-mechanical analysis that will allow us to postprocess hot tearing. This is scheduled for 2020.X Best Regards
  2. Hello Paulo, Mirco Porosity result is based in niyama criterion but more factors are considered besides thermal gradient and cooling rate. This result avoids the need to know the threshold Niyama value below which shrinkage porosity forms by showing results as form of a percentage. Maximum percentage will be the maximum contraction value of the material used. So in your case, results are showing that 4.17% of the red areas is a void. Regarding to your question about avoiding porosity in your part, what you can do is to place cooling lines close to the porosity regions. Anyway, you have to think that avoid all the porosity sometimes is very difficult and having porosity is not always a problem If porosity is not in a region prone to suffer defects (structural regions, leakages, outhern surfaces..) In your case for example, it looks that central region of the door handle is worst than the regions of the corner where the bigger porosities are since those areas are prone to structural damage due to mechanical stresses. I attached a paper where MicroPorosity is explained. 1-Prediction of Shrinkage Pore Volume Fraction Using a Dimensionless Niyam...pdf
  3. Hello, By pressing shift and double clicking you should be able to select all the adjacent surfaces with an inferior angle than the selected at the hamburguer menu inside core options. If it still does not work, please send us the model and we can take a look at it. Best Regards
  4. Hello, You just need to click on the first value of the legend to change the max and the last to change the min. Regards
  5. Hello, "Porosity" result shows the macro porosity as a percentage "Total shrinkage volume" shows the macro porosity as a volumetric value. "Micro Porosity" shows micro porosity as a percentage "Niyama" shows micro porosity as ((C*s)**0.5/mm)
  6. Hello, The acceptance of the porosity level will rely on where the porosity is (surface finished, leakages, structural regions ..) more than the size itself. Those standards are used by the companies to designate different porosity regions depending on the requirments from their components. hope this help.
  7. Hello, Niyama is just the thermal gradient divided by the square root of the cooling rate, and it helps to detect micro porosity. I attached a ppt where this is explained but basically the lower the niyama values (high cooling rate or low thermal gradient) the higher the possibility of micro porosity. Remember that Niyama works under a certain range depending on the different materials. This range is not necessary to know in Micro Porosity result. This result is based on dimensionless niyama so no range known is needed. This result is based on niyama and also in other parameters like pressure... (I attached a paper that talks about it) Best Regards Micro_Porosity.pptx 2008-5.6_nileakers.pdf
  8. Hello Brendan, Could you please upload this file you are having problems with to check what is happening? Best Regards
  9. Hello Oliwia, Could you please send us one of the models you are having problems to mesh? I would like to know if the problem is the software or the geometry. Thanks.
  10. Hola Iñaki, Parece que la licencia no está funcionando. Por favor, contáctame a mi email para ayudarte a solucionar el problema. Un saludo. ptorne@altair.com
  11. Hello Andy, you can use AlMg5, it is a similar alloy. Please, contact me if you need aditional info. ptorne@altair.com Best Regards
  12. Hi Uri, Inside the project folder you'll find different files (meshing files, geometry files, solver files...) Is there any file in particular you are interested in? I attached a document that explains how to run C2C in batch mode. Best Regards C2C_BackgroundRunning_v4.0.docx
  13. Hi Uri, This problem appears when the ingates are not well set. It looks like this is a second iteration of an initial simulation, maybe during the second selection of materials something got corrupted. When this happens I recommend to start again the simulation from the original stl creating a new project. Please find attached a simulation ready to run, please check the parameters are fine and run the simulation again. Best Regards ALL-FEED_1.gid.rar
  14. There is a problem when the ingate surface is in contact with one of the surfaces of the additional components (sleeve, core,..) Meanwhile, in case you have this situation, please extrude just an small offset of the face in order to separate the ingate surface from the sleeve surfaces. (see below image) We'll work to solve this issue. Please, find below a link to download the file with the ingate meshed. https://ftam1.altair.com/message/m40gPhijtxxbaxGThmKcbB Best Regards
  15. Hello Uri, The problem is there is no ingate on this model. Please, start again from the scratch and mesh again using an ingate. This should solve the problem. Best Regards
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