Material Properties, Bending Strength - MDF

[lucas.cdsantos]

Hi guys...

I'm trying to create a Medium Density Fiberboard (MDF) material. 

I found its properties but I'm in doubt about some of them. If I'm using the correct material form like below, I have inputs for Yield Strength and Tensile Strength, but I only found properties like Ultimate Tensile Strength (18 Mpa) and Bending Strength MOR (38 Mpa), but nothing about Yield Strength.

Are some of them the same? Which one I put where?

Thanks!

[JDMather]

Why are you trying to enter any other properties other than Density for MDF?

Inventor FEA is limited to isotropic materials.

[lucas.cdsantos]

I'm making a table, later I'll have to check stress analysis.

[JDMather]

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@lucas.cdsantos wrote:

....I'll have to check stress analysis.

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In what analysis software? (Inventor linear stress analysis is limited to isotropic materials.)

[LT.Rusty]

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@Anonymous wrote:

Why are you trying to enter any other properties other than Density for MDF?

Inventor FEA is limited to isotropic materials.

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MDF is ... not perfectly isotropic, but it's pretty darn close.

[lucas.cdsantos]

Stress analysis would be in Inventor itself.
Limited in which aspects? Won't be a complicated analysis...
But anyway, about the properties, any tips?

[LT.Rusty · Accepted solution]

MDF is fairly brittle - it doesn't bend too far before it breaks - so for myself I'd set the yield strength pretty close to the tensile strength.  If your tensile is 18 mPa, I'd probably go with 17.5 or 18 for the yield strength.  This is a bit of a SWAG, though - a quick google search didn't get a specific number for MDF.