Vibrant times for mechanical metamaterials
TLDR
In this article, the authors focus on recent advances and remaining challenges in the emerging field of mechanical metamaterials and present a prospective review of the most recent advances in this emerging field.Abstract:
Metamaterials are man-made designer matter that obtains its unusual effective properties by structure rather than chemistry. Building upon the success of electromagnetic and acoustic metamaterials, researchers working on mechanical metamaterials strive at obtaining extraordinary or extreme elasticity tensors and mass-density tensors to thereby mold static stress fields or the flow of longitudinal/transverse elastic vibrations in unprecedented ways. In this prospective paper, we focus on recent advances and remaining challenges in this emerging field. Examples are ultralight-weight, negative mass density, negative modulus, pentamode, anisotropic mass density, Origami, nonlinear, bistable, and reprogrammable mechanical metamaterials.read more
Citations
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Controlling sound with acoustic metamaterials
TL;DR: In this article, a review of the design and properties of active acoustic metamaterials can be found, as well as an overview of future directions in the field of sound manipulation.
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Flexible mechanical metamaterials
TL;DR: In this article, the design principles leading to these properties are identified and discussed, in particular, linear and mechanism-based metamaterials (such as origami-based and kirigami based metammaterials), harnessing instabilities and frustration, and topological and nonlinear metam materials.
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Additive manufacturing of metallic components by selective electron beam melting — a review
TL;DR: In this article, a review of the relationship between process characteristics, material consolidation and the resulting materials and component properties is presented, with a special focus on the relationship of process characteristics and material consolidation.
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Auxetic metamaterials and structures: a review
TL;DR: In this paper, the relationship among structures, materials, properties and applications of auxetic metamaterials and structures is discussed. And the challenges and future work on the topic of auxetics are also presented to inspire prospective research work.
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Mechanical metamaterials associated with stiffness, rigidity and compressibility: a brief review
TL;DR: In this article, a clear classification of mechanical metamaterials have been established based on the fundamental material mechanics, which can be divided into strong-lightweight (E/ρ), pattern transformation with tunable stiffness, negative compressibility (−4G/3), and strong light-weight (S/ρ).
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