Executive Summary : | Material research is rapidly focusing on exploring multifunctional properties in materials, with 3D printing technology enabling the fabrication of complex micro-structures of mechanical metamaterials. These metamaterials have various applications, including low-cost, highly efficient, compact, vibration control systems, and lightweight, high stiffness materials. The focus has been on bandgap creation and stiffness property enhancements, but there is a vast scope of material research that can enhance the material characteristics of meta-structures while considering material or geometric nonlinearities. Wave attenuation at very low frequencies is another challenging problem that researchers are studying extensively. However, maintaining high stiffness properties while keeping bandgap properties intact is another challenge. The multifunctional properties of mechanical metamaterial within the linear regime are well explored, with predominantly metals or polymers used as constituent materials. Metamaterial with flexible constituent material can be used as low-frequency vibration absorption systems. The effect of geometric nonlinearity can lead to differential dynamic responses with respect to the amplitude of loading, resulting in interesting dynamic phenomena. This study aims to explore the possibility of enhancing dynamic properties without compromising stiffness properties. It will investigate dynamic responses in the nonlinear regime due to geometry and observe associated phenomena. The study will also extend to explore the behavior of structures made of flexible materials, as appropriate geometric arrangement can significantly increase the energy absorption capacity of the material. |