Mechanical Engineering Commons^™

Blast-Wave Impact Mitigation Using Negative Effective Mass Density Concept Of Elastic Metamaterials, Kwek Tan, H. Huang, C. Sun

Dr. Kwek-Tze Tan

This paper presents the use of elastic metamaterials for impact attenuation and blast-wave mitigation. Metamaterials represent a novel and emerging research area where materials exhibit exceptional properties not commonly found in natural materials. These unique properties are enacted by specifically designed microstructures. In this study, a single-resonator model and a dual-resonator microstructural design are proposed to exhibit negative effective mass density. The effect of negative effective mass density is explicitly confirmed by analysis of wave propagation using numerical simulations. Results evidently show that impact stress wave attenuation occurs over a wider frequency spectrum for the dual-resonator model as compared to …