Journal ArticleDOI
Tailored Buckling Microlattices as Reusable Light‐Weight Shock Absorbers
Tobias Frenzel,Claudio Findeisen,Claudio Findeisen,Muamer Kadic,Peter Gumbsch,Peter Gumbsch,Martin Wegener +6 more
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TLDR
Based on a class of uniaxial light-weight geometrically nonlinear mechanical microlattices and using buckling of inner elements, either a sequence of snap-ins followed by irreversible hysteretic - yet repeatable - self-recovery or multistability is achieved, enabling programmable behavior.Abstract:
Structures and materials absorbing mechanical (shock) energy commonly exploit either viscoelasticity or destructive modifications. Based on a class of uniaxial light-weight geometrically nonlinear mechanical microlattices and using buckling of inner elements, either a sequence of snap-ins followed by irreversible hysteretic - yet repeatable - self-recovery or multistability is achieved, enabling programmable behavior. Proof-of-principle experiments on three-dimensional polymer microstructures are presented.read more
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Printing soft matter in three dimensions
TL;DR: The expanding range of printable materials, coupled with the ability to programmably control their composition and architecture across various length scales, is driving innovation in myriad applications.
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Three-dimensional mechanical metamaterials with a twist
TL;DR: Microstructured three-dimensional elastic chiral mechanical metamaterials that overcome the unavailability of this degree of freedom hinders applications in terms of mode conversion and the realization of advanced mechanical designs using coordinate transformations are realized.
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Mechanical Metamaterials and Their Engineering Applications
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Nanolattices: An Emerging Class of Mechanical Metamaterials.
Jens Bauer,Jens Bauer,Lucas R. Meza,Tobias A. Schaedler,Ruth Schwaiger,Xiaoyu Zheng,Lorenzo Valdevit +6 more
TL;DR: The introduction of a hierarchical architecture is an effective tool in enhancing mechanical properties, and the eventual goal of nanolattice design may be to replicate the intricate hierarchies and functionalities observed in biological materials.
Journal ArticleDOI
Static non-reciprocity in mechanical metamaterials.
TL;DR: It is shown that it is possible to break reciprocity in static systems, realizing mechanical metamaterials that exhibit vastly different output displacements under excitation from different sides, as well as one-way displacement amplification.
References
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MonographDOI
The Theory of Composites
TL;DR: Some of the greatest scientists including Poisson, Faraday, Maxwell, Rayleigh, and Einstein have contributed to the theory of composite materials Mathematically, it is the study of partial differential equations with rapid oscillations in their coefficients Although extensively studied for more than a hundred years, an explosion of ideas in the last five decades has dramatically increased our understanding of the relationship between the properties of the constituent materials, the underlying microstructure of a composite, and the overall effective moduli which govern the macroscopic behavior as mentioned in this paper.
Journal ArticleDOI
Ultralight, ultrastiff mechanical metamaterials
Xiaoyu Zheng,Howon Lee,Todd H. Weisgraber,Maxim Shusteff,Joshua R. Deotte,Eric B. Duoss,Joshua D. Kuntz,Monika M. Biener,Qi Ge,Julie A. Jackson,Sergei O. Kucheyev,Nicholas X. Fang,Christopher M. Spadaccini +12 more
TL;DR: A class of microarchitected materials that maintain a nearly constant stiffness per unit mass density, even at ultralow density is reported, which derives from a network of nearly isotropic microscale unit cells with high structural connectivity and nanoscale features, whose structural members are designed to carry loads in tension or compression.
Journal ArticleDOI
Ultralight Metallic Microlattices
Tobias A. Schaedler,Alan J. Jacobsen,Anna Torrents,Adam E. Sorensen,Jie Lian,Julia R. Greer,Lorenzo Valdevit,William B. Carter +7 more
TL;DR: A route is developed for fabricating extremely low-density, hollow-strut metallic lattices that exhibit complete recovery after compression exceeding 50% strain, and energy absorption similar to elastomers and attribute these properties to structural hierarchy at the nanometer, micrometer, and millimeter scales.