Abstract: Layered elastic metamaterials, which simultaneously exhibit negative effective mass density and bulk modulus, can be obtained with a unit cell of multiphase materials. In this paper, a systematic method for the design of ...

Abstract: We recently showed theoretically that the infinite singularity of the thermal cloak designed by transformation thermodynamics could be eliminated by a new method—the path design of the heat flux without any approximation. ...

Abstract: The roton-like dispersions support the “return flow” of acoustic waves; such phenomena were only observed in quantum systems. In this paper, we aim to investigate the nonlinear roton-like dispersion in a mechanical ...

Abstract: This paper presents a refined model for a mechanical diode based on a mass-spring system. The proposed model utilizes a bilinear spring to construct a frequency converter, which effectively disrupts the reciprocal transmission ...

Abstract: A nonlinear energy sink (NES) approach is proposed for whole-spacecraft vibration reduction. Frequency sweeping tests are conducted on a scaled whole-spacecraft structure without or with a NES attached. The experimental ...

Abstract: In traditional active flutter control, piezoelectric materials are used to increase the stiffness of the aeroelastic structure by providing an active stiffness, and usually the active stiffness matrix is symmetric. That ...

Abstract: The band gap has been used to control the transmission features of acoustic/elastic waves. Rotonlike dispersion relations show that the energy and momentum of acoustic waves are inversely proportional to each other at ...

Abstract: The present research is concerned with the free vibrations and energy transfer of a vibrating gyroscope, which is composed of a flexible beam with surrounded piezoelectric films in a rotating space. The governing equations ...