Journal ArticleDOI
Fabrication and deformation of three-dimensional hollow ceramic nanostructures
TLDR
The fabrication of hollow ceramic scaffolds that mimic the length scales and hierarchy of biological materials are reported, suggesting that the hierarchical design principles offered by hard biological organisms can be applied to create damage-tolerant lightweight engineering materials.Abstract:
Creating lightweight, mechanically robust materials has long
been an engineering pursuit. Many siliceous skeleton species—
such as diatoms, sea sponges and radiolarians—have remarkably
high strengths when compared with man-made materials
of the same composition, yet are able to remain lightweight
and porous1–7. It has been suggested that these properties
arise from the hierarchical arrangement of different structural
elements at their relevant length scales8,9. Here, we report the
fabrication of hollow ceramic scaffolds that mimic the length
scales and hierarchy of biological materials. The constituent
solids attain tensile strengths of 1.75 GPa without failure
even after multiple deformation cycles, as revealed by in situ
nanomechanical experiments and finite-element analysis. We
discuss the high strength and lack of failure in terms of stress
concentrators at surface imperfections and of local stresses
within the microstructural landscape. Our findings suggest that
the hierarchical design principles offered by hard biological organisms
can be applied to create damage-tolerant lightweight
engineering materials.read more
Citations
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Journal ArticleDOI
Terahertz resonant transmission through metallic mesh truss structures
TL;DR: In this article, a terahertz transmission through a truss structure composed of metallic meshes was observed, and the frequencies and spatial distributions of the resonant modes were investigated in the numerical simulations.
Journal ArticleDOI
Green laser powder bed fusion based fabrication and rate-dependent mechanical properties of copper lattices
Sung-gyu Kang,R. R. Gainov,D. Heussen,Sören Bieler,Zhongji Sun,Kerstin Weinberg,Gerhard Dehm,Rajaprakash Ramachandramoorthy +7 more
TL;DR: In this paper , the deformation behavior of pure copper lattice structures is investigated under a wide range of strain rates from ∼0.001 /s to ∼1000 /s, which can be attributed to the intrinsic mechanical properties of Cu.
Journal ArticleDOI
Diamond-structured nanonetwork gold as mechanical metamaterials from bottom-up approach
Suhail K Siddique,H Sadek,Chi-Wei Wang,Chang-Chun Lee,Cheng Yuan Tsai,Shou-Yi Chang,Chia-Lin Li,C.H. Hsueh,Rong-Ming Ho +8 more
TL;DR: In this paper , a bottom-up approach using a self-assembled block copolymer for templated electrochemical deposition is proposed to fabricate a diamond-structured metamaterial.
Proceedings ArticleDOI
Transformation of 2d planes into 3d soft structures with electrical functions
TL;DR: In this paper, a novel technique to selectively bond polydimethylsiloxane (PDMS) and parylene C by plasma treatment, with which 2D structures fabricated using conventional MEMS techniques are transformed into 3D structures by the inflation of selectively non-bonded patterns.
Journal ArticleDOI
An Improved Mechanism-Based Strain Gradient Plasticity Model and Its Application to Size Effect Under Complex Loading
TL;DR: In this paper , an extended model that considers both effects of grain size and strain gradient has been proposed to investigate the size effect of copper wires under complex working conditions, and the simulation results show that the hollow structure can improve the bearing capacity of the micro-wires under torsion.
References
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Book
Cellular Solids: Structure and Properties
Lorna J. Gibson,Michael F. Ashby +1 more
TL;DR: The linear elasticity of anisotropic cellular solids is studied in this article. But the authors focus on the design of sandwich panels with foam cores and do not consider the properties of the materials.
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Introduction to Ceramics
TL;DR: In this paper, the authors present a model for the development of the MICROSTRUCTURE in CERAMICS based on phase transformation, glass formation and glass-Ceramics.
MonographDOI
Mechanical Behavior of Materials
TL;DR: A balanced mechanics-materials approach and coverage of the latest developments in biomaterials and electronic materials, the new edition of this popular text is the most thorough and modern book available for upper-level undergraduate courses on the mechanical behavior of materials as discussed by the authors.
Journal ArticleDOI
THE MATERIAL BONE: Structure-Mechanical Function Relations
S. Weiner,Hanoch Daniel Wagner +1 more
TL;DR: The structure-mechanical relations at each of the hierarchical levels of organization are reviewed, highlighting wherever possible both underlying strategies and gaps in the authors' knowledge.