Journal ArticleDOI
Fabrication and deformation of three-dimensional hollow ceramic nanostructures
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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
Topology optimization of periodic beam lattices using Cosserat elasticity
TL;DR: In this paper , a method based on the Cosserat theory was proposed to optimize the topology of metamaterials made of slender beams, and the results showed that the locally allowed volume fraction was the most critical limiting parameter when maximizing global stiffness.
Journal ArticleDOI
Effect of micron-scale manufacturing flaws on the tensile response of centimeter sized two-photon polymerization microlattices
TL;DR: In this article, the authors report on uniaxial tensile tests on millimeter-sized two-photon polymerization log-pile structures that were fabricated using a recently developed interdigitated stitching strategy.
Journal ArticleDOI
Failure of P-surfaced Shellular subjected to internal pressure
TL;DR: In this article, the authors measured the internal pressure strengths of a periodic shell architecture made of Ni-P, Cu, and silica and found that the critical pressures of the most ductile Shellular specimens, made of Cu, were the highest among them, despite the low strength of Cu.
Book ChapterDOI
In-Situ Mechanics: Introduction and Importance
TL;DR: In this article, the authors introduce the concept and capabilities of in-situ mechanical characterization of materials and highlight the importance of multi-scale assessment of mechanical properties and deformation mechanisms.
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.