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4 results on '"crystal inspiration"'

1. Comparative Study on the Uniaxial Behaviour of Topology-Optimised and Crystal-Inspired Lattice Materials

Author

Chengxing Yang, Kai Xu, and Suchao Xie

Subjects
lattice material, topology optimisation, crystal inspiration, mechanical properties, energy absorption, Mining engineering. Metallurgy, TN1-997
Abstract

This work comparatively studies the uniaxial compressive performances of three types of lattice materials, namely face-centre cube (FCC), edge-centre cube (ECC), and vertex cube (VC), which are separately generated by topology optimisation and crystal inspiration. High similarities are observed between the materials designed by these two methods. The effects of design method, cell topology, and relative density on deformation mode, mechanical properties, and energy absorption are numerically investigated and also fitted by the power law. The results illustrate that both topology-optimised and crystal-inspired lattices are mainly dominated by bending deformation mode. In terms of collapse strength and elastic modulus, VC lattice is stronger than FCC and ECC lattices because its struts are arranged along the loading direction. In addition, the collapse strength and elastic modulus of the topology-optimised FCC and ECC are close to those generated by crystal inspiration at lower relative density, but the topology-optimised FCC and ECC are obviously superior at a higher relative density. Overall, all topology-generated lattices outperform the corresponding crystal-guided lattice materials with regard to the toughness and energy absorption per unit volume.

Published
2020
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2. Cellular Metals: Fabrication, Properties and Applications.

Author

Duarte, Isabel, Duarte, Isabel, Fiedler, Thomas, Krstulović-Opara, Lovre, and Vesenjak, Matej

Subjects
Technology: general issues, A-242 alloy, CALPHAD, MWCNT, SIMA process, X-ray computed tomography, X-ray radioscopy, X-ray tomography, X-ray tomoscopy, acoustic characterization, age hardening, aluminium alloy foam, aluminum alloy foams, aluminum alloys, aluminum foam, aluminum matrix foam composite (AMFC), anisotropy, beverage cans, cellular materials, cellular metals, chemical oxidation, clogging, composites, compression test, computational simulation, continuous production, crystal inspiration, cuckoo search algorithm, direct foaming method, drainage, elasticity, electroless deposition nickel, enclosed gas, energy absorption, epoxy resin, expansion, experimental tests, experimental validation, explosive compaction, fabrication, finite element simulation, foam, friction welding, gradient compressed porous metal, grain refinement, graphene oxide, graphene-based materials, hybrid structures, infrared thermography, lattice material, liquid fraction, X-ray diffraction, mechanical, mechanical characterization, mechanical properties, mechanics of materials, melt treatment, metal foam, metallography, metallurgy, microstructure, modification, multiaxial yielding, n/a, nanocomposites, open-cell aluminum foam, open-cell foam, optimal parameters, plasticity, polyurethane foam, pore morphology, porosity, porous metal, powder metallurgy, precipitation phase, primary crystals, recycle, recycling, semi-solid, slope casting, sound absorption performance, theoretical modeling, thermal and acoustic properties, thermal characterization, topology optimisation, unidirectional cellular structure
Abstract

Summary: Cellular solids and porous metals have become some of the most promising lightweight multifunctional materials due to their superior combination of advanced properties mainly derived from their base material and cellular structure. They are used in a wide range of commercial, biomedical, industrial, and military applications. In contrast to other cellular materials, cellular metals are non-flammable, recyclable, extremely tough, and chemically stable and are excellent energy absorbers. The manuscripts of this Special Issue provide a representative insight into the recent developments in this field, covering topics related to manufacturing, characterization, properties, specific challenges in transportation, and the description of structural features. For example, a presented strategy for the strengthening of Al-alloy foams is the addition of alloying elements (e.g., magnesium) into the metal bulk matrix to promote the formation of intermetallics (e.g., precipitation hardening). The incorporation of micro-sized and nano-sized reinforcement elements (e.g., carbon nanotubes and graphene oxide) into the metal bulk matrix to enhance the performance of the ductile metal is presented. New bioinspired cellular materials, such as nanocomposite foams, lattice materials, and hybrid foams and structures are also discussed (e.g., filled hollow structures, metal-polymer hybrid cellular structures).

3. Comparative Study on the Uniaxial Behaviour of Topology-Optimised and Crystal-Inspired Lattice Materials

Author

Kai Xu, Chengxing Yang, and Suchao Xie

Subjects
lcsh:TN1-997, Toughness, Materials science, Cellular topology, topology optimisation, Metals and Alloys, 02 engineering and technology, crystal inspiration, mechanical properties, 021001 nanoscience & nanotechnology, Topology, Power law, lattice material, 020303 mechanical engineering & transports, 0203 mechanical engineering, Energy absorption, Lattice (order), Lattice materials, Relative density, General Materials Science, energy absorption, 0210 nano-technology, Elastic modulus, lcsh:Mining engineering. Metallurgy
Abstract

This work comparatively studies the uniaxial compressive performances of three types of lattice materials, namely face-centre cube (FCC), edge-centre cube (ECC), and vertex cube (VC), which are separately generated by topology optimisation and crystal inspiration. High similarities are observed between the materials designed by these two methods. The effects of design method, cell topology, and relative density on deformation mode, mechanical properties, and energy absorption are numerically investigated and also fitted by the power law. The results illustrate that both topology-optimised and crystal-inspired lattices are mainly dominated by bending deformation mode. In terms of collapse strength and elastic modulus, VC lattice is stronger than FCC and ECC lattices because its struts are arranged along the loading direction. In addition, the collapse strength and elastic modulus of the topology-optimised FCC and ECC are close to those generated by crystal inspiration at lower relative density, but the topology-optimised FCC and ECC are obviously superior at a higher relative density. Overall, all topology-generated lattices outperform the corresponding crystal-guided lattice materials with regard to the toughness and energy absorption per unit volume.

Published
2020

4. Comparative Study on the Uniaxial Behaviour of Topology-Optimised and Crystal-Inspired Lattice Materials.

Author

Yang, Chengxing, Xu, Kai, and Xie, Suchao

Subjects
SPECIFIC gravity, ELASTIC modulus, COMPARATIVE studies, MATERIALS, ELECTRIC current rectifiers, BEHAVIOR
Abstract

This work comparatively studies the uniaxial compressive performances of three types of lattice materials, namely face-centre cube (FCC), edge-centre cube (ECC), and vertex cube (VC), which are separately generated by topology optimisation and crystal inspiration. High similarities are observed between the materials designed by these two methods. The effects of design method, cell topology, and relative density on deformation mode, mechanical properties, and energy absorption are numerically investigated and also fitted by the power law. The results illustrate that both topology-optimised and crystal-inspired lattices are mainly dominated by bending deformation mode. In terms of collapse strength and elastic modulus, VC lattice is stronger than FCC and ECC lattices because its struts are arranged along the loading direction. In addition, the collapse strength and elastic modulus of the topology-optimised FCC and ECC are close to those generated by crystal inspiration at lower relative density, but the topology-optimised FCC and ECC are obviously superior at a higher relative density. Overall, all topology-generated lattices outperform the corresponding crystal-guided lattice materials with regard to the toughness and energy absorption per unit volume. [ABSTRACT FROM AUTHOR]

Published
2020
Full Text
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