Acoustic properties of materials with reduced Poisson ratio.

Abstract

Reduced Poisson ratio materials present an interesting opportunity for altering acoustic properties. Relationship of material morphology with Poisson ratio will be explored. The effect of Poisson ratio on mechanical properties will be reviewed. Relationship with moduli, flexural rigidity, and fracture toughness will be examined. Reduced Poisson materials have low cutoff frequencies and low wave dispersion constants compared to analogous conventional materials. Development of a variety of materials for specific applications will be discussed. The generic approach to the fabrication of reduced Poisson ratio materials, such as foams, honeycombs, laminates, and composites, provides application engineers added flexibility in choosing appropriate materials.