This work presents design concepts to synthesize composite materials with special dynamic properties, namely, materials that soften at high frequencies. Such dynamic properties are achieved through the use of a two-phase material that has inclusions of a viscoelastic material of negative elastic modulus in a typical matrix phase that has a positive elastic modulus. A possible realization of the negative-stiffness inclusion phase is presented. A numerical homogenization technique is used to compute the average viscoelastic properties of the composite. The method and the properties of a composite material designed with it are demonstrated through an example.
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A Concept for a Material That Softens With Frequency
Prasad, J., and Diaz, A. R. (August 18, 2008). "A Concept for a Material That Softens With Frequency." ASME. J. Mech. Des. September 2008; 130(9): 091703. https://doi.org/10.1115/1.2965596
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