The Hong Kong University of Science and Technology (HKUST) researchers have successfully created solid composite materials with the unique wave property of fluid, a property which forbids the transmission of transverse waves. The transverse waves can lead to destructive horizontal shaking during an earthquake. Such composite, also called “metamaterials”, can be used for wave filtering and vibration control and may eventually provide an alternative earthquake proofing solution as well as improve the efficiency of medical ultrasound transducers.
The metamaterial created by the team is a composite of three solid materials-silicone-coated steel cylinders embedded in epoxy, in which the elastic silicone rubber layer with different thicknesses around the sides and on two ends of the cylinder acts like a spring. Harnessing the anisotropic resonances, the metamaterial, can only support longitudinal waves while forbidding the propagation of transverse waves within a certain range of frequencies. Read More...
Prof. SHENG Ping(Middle) and his research team members Dr. MA Guancong(Left) and Mr. FU Caixing(Right)
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