NOVELTY - The aggregate (18) has a spherical geometric multilayer body including an inner core surrounded by a compliant layer. The core is formed of a core material including high mass density relative to the compliant layer. The compliant layer is formed of a compliant material e.g. silicon material, with elastic modulus inducing a kinetic oscillation in the core that imparts mechanical energy to the body within a target frequency range when exposed to an energy wave such that the aggregate exhibits a negative effective mass to trap a portion of the mechanical energy of the wave within the aggregate. USE - Engineered aggregate for use in a structural metamaterial (claimed) i.e. composite concrete metamaterial in structural applications such as bunker applications and shelter applications. Can also be used for seismic force-building material applications in earthquake zones, military applications and aircraft structural applications. ADVANTAGE - The aggregate tunes a resonant behavior of the metamaterial to adjust a range of frequencies to which the metamaterial system can respond by tuning the materials, configuration, size and concentration of the aggregate within a matrix in an effective manner. The aggregate reduces stress in the surrounding matrix, thus enhancing ability of the metamaterial to sustain applied dynamical forces without damage. The aggregate reduces transmission ratio observed in comparison to a homogeneous concrete slab, thus suggesting improved performance within the range of frequencies corresponding to dips.

Engineered aggregate for use in composite concrete metamaterial in e.g. shelter applications, has spherical geometric multilayer body including inner core surrounded by compliant layer, where core is formed of core material

PANDOLFI, ANNA MARINA;
2013-01-01

Abstract

NOVELTY - The aggregate (18) has a spherical geometric multilayer body including an inner core surrounded by a compliant layer. The core is formed of a core material including high mass density relative to the compliant layer. The compliant layer is formed of a compliant material e.g. silicon material, with elastic modulus inducing a kinetic oscillation in the core that imparts mechanical energy to the body within a target frequency range when exposed to an energy wave such that the aggregate exhibits a negative effective mass to trap a portion of the mechanical energy of the wave within the aggregate. USE - Engineered aggregate for use in a structural metamaterial (claimed) i.e. composite concrete metamaterial in structural applications such as bunker applications and shelter applications. Can also be used for seismic force-building material applications in earthquake zones, military applications and aircraft structural applications. ADVANTAGE - The aggregate tunes a resonant behavior of the metamaterial to adjust a range of frequencies to which the metamaterial system can respond by tuning the materials, configuration, size and concentration of the aggregate within a matrix in an effective manner. The aggregate reduces stress in the surrounding matrix, thus enhancing ability of the metamaterial to sustain applied dynamical forces without damage. The aggregate reduces transmission ratio observed in comparison to a homogeneous concrete slab, thus suggesting improved performance within the range of frequencies corresponding to dips.
2013
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/930376
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