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[calumsangster]

Hello, My is Calum

I am currently doing my 4th year project on the behaviour of neoprene gaskets. In my project I am trying to identify the operational limits for the amount of clamping force that can be applied to the gaskets without causing permanent deformation. I have carried out experimental work and I am now aiming to validate this through FEA. I have modelled the gasket as 2D axisymmetric with the two rectangles above and below the gasket representing the flanges. One flange will have a fixed support along the bottom edge and the other flange will have a force of 18730N applied to the top edge (This force is the minimum force calculated to form a reliable seal).

I have managed to get this far without too much problems but when I try to add the contact regions between the flanges and the gaskets and then solve for the total deformation of the gasket the message appears that I have 'An internal solution magnitude has been reached.'

Does anyone know how to change the solution magnitudes or have any other recommendations on how to simulate?

Cheers

Calum

 

 

[jj77]

The contacts are not working - make sure you choose the edge of the neoprene and the lower edge of the upper part, and for the other contact use the upper edge of the lower part, and the bottom edge of the neoprene.

 

Also the material seems a bit soft (neoprene). Neop. rubber seems OK, but check all properties

 

Finally the point force generates a high local stress at the application point. Try to distribute it as it is in reality over a certain area, or apply a displ at the top edge of the top part

[Sandeep Medikonda]

Just to add, This is from the help

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