TwinTurbo.NET: Nissan 300ZX forum - Re: Foam.... I call B.S...
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Subject Re: Foam.... I call B.S...
     
Posted by Tredmil on September 16, 2003 at 2:23 AM
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In Reply To Foam.... I call B.S... posted by z32ttvert on September 15, 2003 at 07:47 PM
     
Message Because I am not intimately familiar with the Z32 chassis, I reserve my opinion of the overall post, but this section confuses me:

Folks may be experiencing less harshness and vibration, but the foam, in order to work, (this comes from a structural engineer, folks) must be as strong or STRONGER than the skin it's in (in this case, layers of 18-guage sheet steel), in order for the two components to make a sandwich that is stronger than either of them alone. IT's not going to happen.

From my professional experience (engineering structural fiberglass and carbon fiber sandwich panels) I don't agree that the foam has to be as strong or stronger than the skin it's in. Why would you even bother using the skin? The foam isn't a load-bearing component of the system. It only serves to hold the skin components in place, which is important when buckling is a possibility, such as in compression, torsion and bending (which is essentially a tension-compression system).

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