Nonlinear stress wave propagation in 3D woodpile elastic metamaterials
| Autor: | Yong Han Noel Kim, Jinkyu Yang, Eunho Kim |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Materials science
business.industry Mechanical Engineering Applied Mathematics Stacking Physics::Optics Metamaterial High stiffness Degrees of freedom (mechanics) Condensed Matter Physics Rod Nonlinear system Optics Stress wave Materials Science(all) Mechanics of Materials Modeling and Simulation Modelling and Simulation Waveform General Materials Science business |
| Zdroj: | International Journal of Solids and Structures. 58:128-135 |
| ISSN: | 0020-7683 |
| DOI: | 10.1016/j.ijsolstr.2014.12.024 |
| Popis: | We study the formation and propagation of nonlinear stress waves in 3D woodpile elastic metamaterials consisting of vertically stacked slender cylindrical rods. We find the nonlinear waveforms transmitted through the woodpile architectures under impact are highly sensitive to their design parameters, particularly stacking distances and angles in 3D assemblies. We numerically and experimentally demonstrate that the woodpile system can localize, modulate, and ultimately attenuate propagating nonlinear waves in an efficient manner without relying on material damping. We also show the feasibility of constructing metamaterials with a simultaneous characteristic of high damping and high stiffness by using the controllable wave dispersion in the woodpile structures. These woodpile metamaterials offer enhanced degrees of freedom in manipulating stress waves, thereby offering a new way to design efficient impact protectors with high stiffness. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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