Foam composite construction

[Guillermo]

Let's compare it with a well known product as Dyvinicell H130:
(http://www.diabgroup.com/europe/lite...df/H_DS_EU.pdf)

Nominal density: 130 kg/m3
Compressive strength: 3,0 MPa
Compressive modulus: 170 MPa
Tensile strength: 4,8 MPa
Tensile modulus: 175 MPa
Shear strength: 2,2 MPa
Shear Modulus: 50 MPa
Shear Strain: 40%

(1 Pascal = 1 Newton/sqm)

[kengrome]

All I know how to compare here is the density and compressive strength, and although the divinycell is a little bit heavier it is also more than 4 times stronger in compression.

[Pericles]

Ken,

Yes, 3.0 MPa equals 3000 kN / m2, which pretty much rules Foamglas out of consideration. You wouldn't believe how difficult it is to find the compressive strength of Meranti ply though. I wanted it for comparison. According to the Forest Products Lab. in Wisconsin, ordinary sheathing plywood ranges between 20.7 to 34.5 MPa.

[Man Overboard]

Meranti (Hydrotech) Compression Parallel to Grain - 52.9 N/mm2

[Pericles]

Tom,

Thanks for that figure, which means if I have got the wording correct, the compressive strength may be expressed as 52.9 MPa. No wonder epoxy/Meranti ply composite craft are so tough!

Perry