Optimal design of cavity-free mechanical metamaterials exhibiting negative thermal expansion

International Journal of Mechanical Sciences, Journal Year: 2024, Volume and Issue: 283, P. 109693 - 109693

Published: Sept. 4, 2024

Language: Английский

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Revealing defect-mode-enabled energy localization mechanisms of a one-dimensional phononic crystal

International Journal of Mechanical Sciences, Journal Year: 2021, Volume and Issue: 215, P. 106950 - 106950

Published: Nov. 18, 2021

Language: Английский

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Phononic metastructures with ultrawide low frequency three-dimensional bandgaps as broadband low frequency filter

Scientific Reports, Journal Year: 2021, Volume and Issue: 11(1)

Published: March 30, 2021

Abstract Vibration and noise control are among the classical engineering problems that still draw extensive research interest today. Multiple active passive techniques to resolve these have been reported, however, challenges remain substantial. The recent surge of activities on acoustic metamaterials for vibration testimony fact metamaterial is no longer limited pure theoretical concepts. For over an ultrawide frequency region, 3-D metastructures emerge as a novel solution tool this problem. In context, present study reports proposal monolithic phononic with capability induce low three-dimensional bandgaps relative bandwidth enhancements 157.6% 160.1%. proposed metastructure designs consist elastic frame assembly connected rigid cylindrical masses. Such structural configuration mimics monoatomic mass-spring chain where spring mass. We develop analytical model based determine mode responsible opening bandgap. wave dispersion reveals presence both types metastructures. modal analysis shows distribution energy in bandgap ( global resonant ) closing local bounding edges. further analyze band structures discuss physical concepts govern such attenuation inside range demonstrated by response studies conducted two different finite element models. Thanks additive manufacturing technology, prototypes prepared amplitude test performed validate numerical findings. Experimental results show zone spreads broadband spectrum. reported scale material independent. methodology, modelling design strategy presented here may pave way development meta-devices noises range.

Language: Английский

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Periodic and aperiodic 3-D composite metastructures with ultrawide bandgap for vibration and noise control

Composite Structures, Journal Year: 2022, Volume and Issue: 287, P. 115324 - 115324

Published: Feb. 7, 2022

Language: Английский

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Forest trees as a natural metamaterial for surface wave attenuation in stratified soils

Construction and Building Materials, Journal Year: 2022, Volume and Issue: 363, P. 129769 - 129769

Published: Nov. 30, 2022

Language: Английский

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