Syntactic-Foam Prepregs

Uniaxial compressive properties are important to the design engineer who can utilize the foams inherent high compressive strength in reinforcing other structural members. Sandwich construction is a typical example of such a use, as in submarine-hull construction. Syntactic-foam prepregs have been developed for this application (7). 

Table 42 shows properties of epoxy syntactic foam prepregs. Table 43 shows the strength of 10-ply laminates of epoxy prepregs in three orientations (8). The table indicates that the products have satisfactory isotropicity. 

Table 42 Properties of Epoxy Syntactic Foam Prepregs (8)... 

Test panels 10x10 in. were fabricated from 10 layers of syntactic foam prepreg (7804 iaminated IZ-ply). 

Table 45 shows that epoxy syntactic foam prepreg can be used for deep-sea applications. For example, an outer hull of Synpreg 7801 can be applied to deep-submergence vehicles to be used at a depth of 20,000 ft. 

Table 45 Properties of Epoxy Syntactic-Foam Prepreg (8) Vehicle...

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