Mass Density of Rubber.

[vikas.kr]

Hi,

I have a small clarification with entering Mass density property of Rubber in Dynamic Analysis.

Let's say i have experimentally fit the curve for Mooney (2) and extracted the strain energy co-efficients, now if i have to run a Normal mode analysis i need to enter Mass Density,But neither i have this property nor i'll get the same from the experimental fit.

I'm duing the analysis in MARC-Mentat. By default Mass density will be assigned to "1" in Marc, but this may not be true for different kind of elastomers, In this case is there any way to calculate the mass density from the co-efficents or shore hardenss test??

Kindly shed the light.

Regards,
Vikas.

[Jorgen]

No you cannot calculate the mass density from that type of mechanical data. I recommend that you simply use a common value, like 1000 kg/m^3.

That is typically good enough for simple calculations. If you need more accuracy then you can determine the mass density without too much trouble...