Elastic Metamaterials with Simultaneously Negative Effective Shear Modulus and Mass Density
نویسندگان
چکیده
منابع مشابه
Elastic metamaterials with simultaneously negative effective shear modulus and mass density.
We propose a type of elastic metamaterial comprising fluid-solid composite inclusions which can possess a negative shear modulus and negative mass density over a large frequency region. Such a material has the unique property that only transverse waves can propagate with a negative dispersion while longitudinal waves are forbidden. This leads to many interesting phenomena such as negative refra...
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This work presents a method to determine the effective dynamic properties of resonant metamaterials. The longitudinal vibration of a rod with periodically attached oscillators was predicted using wave propagation analysis. The effective mass density and modulus were determined from the transfer function of vibration responses. Predictions of these effective properties compared favorably with la...
متن کاملOn the negative effective mass density in acoustic metamaterials
Article history: Received 19 October 2008 Received in revised form 5 December 2008 Accepted 19 December 2008 Available online 31 January 2009
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A mechanical model representing an acoustic metamaterial that exhibits simultaneously negative mass density and negative Young's modulus was proposed. Wave propagation was studied in the frequency range of double negativity. In view of positive energy flow, it was found that the phase velocity in this range is negative. This phenomenon was also observed using transient wave propagation finite-e...
متن کاملErratum: Shear-mediated contributions to the effective properties of soft acoustic metamaterials including negative index
In this Article, the values of two inequalities have been omitted in the Results section during typesetting. ''For silica particles in water, we examine the long wavelength condition both inside and outside the particles | k C a | ≪ 1, | k′ C a | ≪ but consider the region in which shear effects are known to be significant, | k S a | ≈ 1. '' should read: ''For silica particles in water, we exami...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2011
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.107.105506