Simufact material database for Inconel 718 powder

C B over 1 year ago

I have few questions about the Simufact material database for Inconel 718 powder, when looking into the flow curves all I could see is the data for the plastic region, I would like to know why the Simufact didn't consider the elastic region. Also in the mechanical properties what is the input for elastic modulus for this material because am not able to find it, did you consider infinite elastic modulus? if yes, could you please explain.

Kindly look in to the below plot I got from a simple compression test showing true stress and true strain for IN718 powder at 20C .

Could you please explain why the Simufact database doesn't have any elastic region data.

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0 C B over 1 year ago

Regarding the above mentioned formula of simcompanion.hexagon.com/.../hello-all-is-there-a-method-to-validate-if-our-simufact-forming-compression-test-model-and-results-are-valid-or-not-thanks:

The formula is correct. It is used to define a table driven press using a time velocity profile. Thus time is not constant but starts at 0 and ranges until the end of the process, in your example after may be 60 sec and a stroke of roughly 11.5 mm. The initial velocity will be 0.254 mm/s decreasing non-linearly to 0.1394 mm/s after 60 sec.

Use the formula in a spreadsheet program of your choice, calculate a time series and export it into a cvs file. Import it into the press in Simufact Forming. I am attaching an example cvs file valid only for 25.4 mm initial height. After the import, the press will look like this:

In the simulation result, the effective plastic strain will be uniform over the workpiece, but increasing with time. The effective plastic strain rate will be uniform and constant.

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001.csv
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0 C B over 1 year ago

Regarding the above mentioned formula of simcompanion.hexagon.com/.../hello-all-is-there-a-method-to-validate-if-our-simufact-forming-compression-test-model-and-results-are-valid-or-not-thanks:

The formula is correct. It is used to define a table driven press using a time velocity profile. Thus time is not constant but starts at 0 and ranges until the end of the process, in your example after may be 60 sec and a stroke of roughly 11.5 mm. The initial velocity will be 0.254 mm/s decreasing non-linearly to 0.1394 mm/s after 60 sec.

Use the formula in a spreadsheet program of your choice, calculate a time series and export it into a cvs file. Import it into the press in Simufact Forming. I am attaching an example cvs file valid only for 25.4 mm initial height. After the import, the press will look like this:

In the simulation result, the effective plastic strain will be uniform over the workpiece, but increasing with time. The effective plastic strain rate will be uniform and constant.

Attached Files (1)

001.csv
Cancel
Vote Up 0 Vote Down

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Verify Answer

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