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
Mechanical properties of copper octet-truss nanolattices
TL;DR: In this article, the authors investigate the mechanical properties of copper (Cu) octet-truss nanolattices through a combination of classical molecular dynamics simulations and theoretical analysis.
Journal ArticleDOI
Artificial intelligence-enabled smart mechanical metamaterials: advent and future trends
Pengcheng Jiao,Amir H. Alavi +1 more
TL;DR: In this article, the authors present an interesting venue for control and manipulation of architected structures using metamaterials, which have opened an exciting venue for controlling and manipulating of architectural structures.
Journal ArticleDOI
Perspective of additive manufacturing for metamaterials development
TL;DR: The challenges and research opportunities are discussed for AM fabrication of metamaterials, with focus on high precision, multi-structural and multi-material, topology optimization, support structure, anisotropy and heterogeneity, residual stresses and application realization.
Journal ArticleDOI
Tunable auxeticity and elastomechanical symmetry in a class of very low density core-shell cubic crystals
TL;DR: In this article, the authors consider a triply periodic minimal surface of types Primitive, Diamond, Gyroid, and I-WP and show that core-shell structures respond drastically differently not only in their stiffness but also for each of these observed properties compared to their counterparts with complete filling.
Journal ArticleDOI
Large-deformation and high-strength amorphous porous carbon nanospheres
Weizhu Yang,Shimin Mao,Jia Yang,Tao Shang,Hongguang Song,James C. Mabon,Wacek Swiech,John R. Vance,Zhufeng Yue,Shen J. Dillon,Hangxun Xu,Baoxing Xu +11 more
TL;DR: Inspired by biological shells and honeycomb-like cellular structures in nature, a class of hybrid structural designs are introduced and it is demonstrated that amorphous porous carbon nanospheres with a thin outer shell can simultaneously achieve high strength and sustain large deformation.
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.
Book
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.