Design criteria for polyurethane/rubber coated steel roll
Design criteria for polyurethane/rubber coated steel roll
(OP)
Hallo everybody!
I have a task to calculate the thickness of the polyurethane or rubber coating to be applied to the steel core of a roll. The roll to be used to transport heavy pipes. The polyureathane liner will be casted over the steel body.
Could anyone suggest me what design criteria should I use for my FEA calculations? Should it be max. stresses in the PU material or shear stresses at the adhesive layer with the steel core?
The hyperelastic material model I have already.
Thanks in advance!
Regards,
Kavkir
I have a task to calculate the thickness of the polyurethane or rubber coating to be applied to the steel core of a roll. The roll to be used to transport heavy pipes. The polyureathane liner will be casted over the steel body.
Could anyone suggest me what design criteria should I use for my FEA calculations? Should it be max. stresses in the PU material or shear stresses at the adhesive layer with the steel core?
The hyperelastic material model I have already.
Thanks in advance!
Regards,
Kavkir





RE: Design criteria for polyurethane/rubber coated steel roll
It is a matter of costs. More Poly > more expensive.
From memory i say the deformation of the PU should be limited to 30% of the original thickness.
I calculated the area (an oval) where the polyurethane was compressed. The two cilinders approach eachother untill the polyurethane is deformed enough to build up resisting pressure.
If you need more info i have to search my files. Please let me know what your findings are.
RE: Design criteria for polyurethane/rubber coated steel roll
Well, according to our PU coating supplier, they advise the deformation not higher than 20% of original thickness.
Indeed, the adhesion strength (shear stress at the interface) is driving in this case.
Now I am trying to evaluate the allowed shear stresses based on the peel test results (available), however, it seems that really there is no any straight forward method to relate these two values... Keep looking.
It is also true - thicker the coating better it is, but
we have some space restrictions. The diameter of the steel core plays also an important role.
By the way, have you used a Hertz model to evaluate the stresses in the coating?
RE: Design criteria for polyurethane/rubber coated steel roll
Do you have the possibility to make the roller in a V shape? This will increase the surface in contact with the pipes.
RE: Design criteria for polyurethane/rubber coated steel roll