TY - GEN
T1 - Advanced structured composites as novel phononic crystals and acoustic metamaterials
AU - Matlack, Kathryn H.
AU - Krödel, Sebastian
AU - Bauhofer, Anton
AU - Daraio, Chiara
N1 - Publisher Copyright:
© The Society for Experimental Mechanics, Inc. 2016.
PY - 2016
Y1 - 2016
N2 - We design and test new periodic materials that can reflect and prohibit the propagation of structural vibrations. These materials are engineered as periodic structures with resonant elements. We rely on recent advances in additive manufacturing to 3-D print composite materials that combine periodically embedded metal resonators within a periodic, truss-like polycarbonate lattice structure, functioning as a support matrix. The polycarbonate lattice geometry allows the matrix to be ultra-low density yet load bearing, and have tunable density and tunable effective elastic modulus. The high acoustic impedance mismatch between this lattice and the metal resonators opens the possibility to create materials with low frequency and wide band gaps, or frequencies where acoustic propagation is forbidden, using a combination of Bragg scattering effects with effects due to the presence of local resonators. Finite element modeling is used to analyze various lattice geometries, lattice densities, and resonator locations to show materials with tunable acoustic properties.
AB - We design and test new periodic materials that can reflect and prohibit the propagation of structural vibrations. These materials are engineered as periodic structures with resonant elements. We rely on recent advances in additive manufacturing to 3-D print composite materials that combine periodically embedded metal resonators within a periodic, truss-like polycarbonate lattice structure, functioning as a support matrix. The polycarbonate lattice geometry allows the matrix to be ultra-low density yet load bearing, and have tunable density and tunable effective elastic modulus. The high acoustic impedance mismatch between this lattice and the metal resonators opens the possibility to create materials with low frequency and wide band gaps, or frequencies where acoustic propagation is forbidden, using a combination of Bragg scattering effects with effects due to the presence of local resonators. Finite element modeling is used to analyze various lattice geometries, lattice densities, and resonator locations to show materials with tunable acoustic properties.
KW - 3D printing
KW - Band gaps
KW - Locally resonant acoustic metamaterial
KW - Phononic crystals
KW - Structural vibrations
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U2 - 10.1007/978-3-319-21762-8_19
DO - 10.1007/978-3-319-21762-8_19
M3 - Conference contribution
AN - SCOPUS:84952315075
SN - 9783319217611
T3 - Conference Proceedings of the Society for Experimental Mechanics Series
SP - 155
EP - 162
BT - Mechanics of Composite and Multi-functional Materials - Proceedings of the 2015 Annual Conference on Experimental and Applied Mechanics
A2 - Thakre, Piyush R.
A2 - Ralph, Carter
A2 - Silberstein, Meredith
A2 - Singh, Raman
PB - Springer
T2 - SEM Annual Conference and Exposition on Experimental and Applied Mechanics, 2015
Y2 - 8 June 2015 through 11 June 2015
ER -