Advances in mechanical metamaterials for vibration isolation: A review

Abstract

The adverse effect of mechanical vibration is inevitable and can be observed in machine components either on the long- or short-term of machine life-span based on the severity of oscillation. This in turn motivates researchers to find solutions to the vibration and its harmful influences through developing and creating isolation structures. The isolation is of high importance in reducing and controlling the high-amplitude vibration. Over the years, porous materials have been explored for vibration damping and isolation. Due to the closed feature and the non-uniformity in the structure, the porous materials fail to predict the vibration energy absorption and the associated oscillation behavior, as well as other the mechanical properties. However, the advent of additive manufacturing technology opens more avenues for developing structures with a unique combination of open, uniform, and periodically distributed unit cells. These structures are called metamaterials, which are very useful in the real-life applications since they exhibit good competence for attenuating the oscillation waves and controlling the vibration behavior, along with offering good mechanical properties. This study provides a review of the fundamentals of vibration with an emphasis on the isolation structures, like the porous materials (PM) and mechanical metamaterials, specifically periodic cellular structures (PCS) or lattice cellular structure (LCS). An overview, modeling, mechanical properties, and vibration methods of each material are discussed. In this regard, thorough explanation for damping enhancement using metamaterials is provided. Besides, the paper presents separate sections to shed the light on single and 3D bandgap structures. This study also highlights the advantage of metamaterials over the porous ones, thereby showing the future of using the metamaterials as isolators. In addition, theoretical works and other aspects of metamaterials are illustrated. To this end, remarks are explained and farther studies are proposed for researchers as future investigations in the vibration field to cover the weaknesses and gaps left in the literature.

Developing scaling laws to predict compressive mechanical properties and determine geometrical parameters of modified BCC lattice structures

“…Though, the results of the RM with different values of RD for both the empirical closed-form equations of the strut radius and the geometrical Equation (5) were compared with those of the ABAQUS diagnostic tool to show the accuracy of the former and the discrepancy of the latter as shown in Figure 23. Equation (5) given below is similar to other geometrical equations presented in the literature by several researchers. 26,27,56,57…”

“…Thus, the periodic materials, LSs, are generally preferable than the stochastic ones, foam materials. As such, they have attracted much attention in recent studies, and become a good candidate in various applications, including biomedical science, aerospace engineering, and vibration isolation 5 …”

“…As such, they have attracted much attention in recent studies, and become a good candidate in various applications, including biomedical science, aerospace engineering, and vibration isolation. 5 Previously, the design field of periodic cellular materials was limited to using two-dimensional channels, namely, prismatic materials for instance honeycomb. This limitation is traced back to the difficulty of manufacturing complex geometries using conventional manufacturing methods.…”

Uncertainty analysis of quasi-zero stiffness metastructure for vibration isolation performance

“…These excellent properties of metamaterials and metastructures, the metamaterial-based finite structures, are dictated by man-made microstructures and, therefore, are critically dependent on the choice of the fabrication method. During the past decades, the development of additive manufacturing (AM) techniques has offered new potential for the fabrication of metamaterials or metastructures with complex geometries, many of which cannot be achieved through traditional fabrication methods [11][12][13]. One of the most important advantages of AM techniques is for lightweight engineering structures which are of particular interest in the aerospace and aviation industry [14][15][16][17].…”

The Extreme Mechanics of Viscoelastic Metamaterials

“…Specifically, dissipation plays a key role in vibration transmission. As such, dissipative vibration transmissions has been studied extensively in acoustic metamaterials featuring wave propagation and band gap structures [21,22,23,24,25,26,27,28,29,30] as well vibration and shock control [31,32,33,34,35,36]. However, although the effect of the constitutive materials' dissipation on mechanical instabilities has been well studied [37,38,39,40,41,42,43,44], the role of dissipation in the instabilities that underpin the extreme mechanics of mechanical metamaterials remains poorly understood (Fig 1).…”