High-performance syntactic foams property examples

Honeycombs are structures with hexagonal or cylindrical cells made from thin sheets of aluminium, aramid (Nomex), paper or extruded polypropylene. The dimensions of the cells are generally in the range of 5 mm to 10 mm. The two faces are covered with a firmly adherent composite (or sometimes metal) skin. 

The density is low, 80kg/m or 140kg/m for example, with attractive mechanical properties but the skin adherence on the honeycomb section is delicate. 

Generally, the sandwich composites combine light weight, good flexural stiffness and good stress distribution without weak points. Tensile and compression properties, particularly punching, can be weak. 

The aramid honeycombs, for example Nomex, generally have  

Wood-based composites often use balsa, which has  

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Table 6.23 High-performance syntactic foams property examples...

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