Impact Mitigation Using Elastic Metamaterials-based Structures
I. Impact mitigation using meta-lattice truss core sandwich structure
A novel and original meta-lattice truss core sandwich structure, is proposed and designed for impulsive attenuation and mitigation. More superior ability of impact mitigation and energy absorption is achieved by the local resonance of the desinged meta-structrue.
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1. B. Li, Y. Liu and K.T. Tan. A novel meta-lattice sandwich structure for dynamic load mitigation (2017), Journal of Sandwich Structures and Materials, Online publication.
II. Impact mitigation using dissipative elastic metamaterials with Maxwell-type oscillators
By virtue of the bandgap merging effect induced by the Maxwell-type damper, the transient blast wave can be almost completely suppressed in the low frequency range. A significantly improved performance of the proposed dissipative metamaterials for stress wave mitigation is verified in both time and frequency domains.
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1. S. Alamri, B. Li* and K.T. Tan*. Dynamic load mitigation using dissipative elastic metamaterials with multiple Maxwell-type oscillators, Journal of Applied Physics 123 (2018): 095111.
III. Investigating band gaps in 3D printed cantilever-in-mass metamaterials
In this research, the negative effective mass behavior of elastic/mechanical metamaterials is exhibited by a cantilever-in-mass structure as a proposed design for creating frequency stopping band gaps, based on local resonance of the internal structure. Our study successfully presents the use of one constituent material to create a 3D printed cantilever-in-mass metamaterial with negative effective mass density for stress wave mitigation purposes.
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1. A. Qureshi, B. Li and K.T. Tan. Numerical investigation of band gaps in 3D printed cantilever-in-mass metamaterials, Scientific Reports 6 (2016): 28314.
IV. Experimental verification of impact mitigation by elastic Metamaterials
This work demonstrates the use of elastic metamaterial for impact load attenuation, by measuring and analyzing wave transmission properties. Results evidently show that impact load mitigation occurs in the presence of internal resonators.
Read the full article(s):
1. M.H. Khan, B. Li and K.T. Tan. Impact load Wave transmission in elastic metamaterials, International Journal of Impact Engineering 118 (2018): 50-59.