rotating Solid disc ansys workbench

[centellla]

Hello. I am new ansys Workbench 12 user.
I try to model a solid simple rotating disc wit a hole. By comparing the results from my hand calculations, I see a difference of 20% from the Ansys results. (Hoop stress. Radial is about 9%). Deformations are also far.
Does anyone know how to set up the boundary conditions for this example?

I am using a Rotational speed of 40000rpm. Out dia: 85mm, inner dia 6mm. Material: aluminium (thickness: less than 1 mm for Plane stress)
the support I have used is a cylindrical support: Axial and tangential direction fixed; radial direction free.

I would really appreciate any hint to solve this problem .
thanks

[Adambomb]

Hmm, my first guess would be that you are trying to design a brake disc, but 40,000 rpm would correspond to 2400 mph with a 20" tire. That's a bit fast for aluminum brake discs anyway.

Perhaps try Ansys support?

[Drew Price]

Boundary conditions for what? You haven't said how you are trying to load or constrain it.

Sounds to me like you are designing a circular saw blade, but that's also spinning mighty fast.

You may want to read the Wikipedia article on 'Mad Scientists'.