Bridging necking and shear-banding mediated tensile failure in glasses [PDF]
Physical Review Materials (Letter) 7, L032601 (2023), 2022 The transition between necking-mediated tensile failure of glasses, at elevated temperatures and/or low strain-rates, and shear-banding-mediated tensile failure, at low temperatures and/or high strain-rates, is investigated using tensile experiments on metallic glasses and atomistic simulations.
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Understanding Mechanical Properties and Failure Mechanism of Germanium-Silicon Alloy at Nanoscale [PDF]
J Nanopart Res 22, 311 (2020), 2020 We used molecular dynamics (MD) simulations to investigate the mechanical properties of cubic zinc blende (ZB) Si0.5Ge0.5 alloy nanowire (NW). Tersoff potential is employed to elucidate the effect of nanowire size, crystal orientations, and temperature on the material properties.
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Deep learning framework for carbon nanotubes: mechanical properties and modeling strategies [PDF]
, 2021 Tensile tests at room temperature are performed using molecular dynamics on all configurations of single-walled carbon nanotubes up to 4 nm in diameter. Distributions of the Young's modulus, Poisson's ratio, ultimate tensile strength and fracture strain are determined and reported.
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Atomistic Investigation on the Mechanical Properties and Failure Behavior of Zinc Blende Cadmium Selenide (CdSe) Nanowire [PDF]
Computational Materials Science, Volume 186, 2021, 2020 The mechanical properties of Cadmium Selenide (CdSe) nanowire is an emerging issue due to its application in semiconductor and optoelectronics industries. In this paper, we conducted molecular dynamics (MD) simulations to investigate the temperature-dependent mechanical properties and failure behavior of Zinc-Blende (ZB) CdSe nanowire under uniaxial ...
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Computing Grain Boundary Diagrams of Thermodynamic and Mechanical Properties [PDF]
npj Computational Materials (2021) 7:159, 2021 Computing the grain boundary (GB) counterparts to bulk phase diagrams represents an emerging research direction. Using a classical embrittlement model system Ga-doped Al alloy, this study demonstrates the feasibility of computing temperature- and composition-dependent GB diagrams to represent not only equilibrium thermodynamic and structural characters,
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The influence of strut waviness on the tensile response of lattice materials [PDF]
Journal of Applied Mechanics, 2021, 2020 Recent advances in additive manufacturing methods make it possible, for the first time, to manufacture complex micro-architectured solids that achieve desired stress versus strain responses. Here, we report experimental measurements and associated finite element (FE) calculations on the effect of strut shape upon the tensile response of two-dimensional
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High-Strength Amorphous Silicon Carbide for Nanomechanics [PDF]
arXiv, 2023 For decades, mechanical resonators with high sensitivity have been realized using thin-film materials under high tensile loads. Although there have been remarkable strides in achieving low-dissipation mechanical sensors by utilizing high tensile stress, the performance of even the best strategy is limited by the tensile fracture strength of the ...
arxiv
An unprecedented synergy of high-temperature tensile strength and ductility in a NiCoCrAlTi high-entropy alloy [PDF]
arXiv, 2023 The present work reported a novel L12-strengthening NiCoCrAlTi high entropy alloy (HEA) with an outstanding synergy of tensile strength and ductility at both ambient and high temperatures. Transmission electron microscopy (TEM) characterization revealed a high density of rod-like and spheroidal L12 precipitates distributing in the micro/nanograins and ...
arxiv
Temperature dependent elastic constants and ultimate strength of graphene and graphyne [PDF]
, 2012 Based on the first principles calculation combined with quasi-harmonic approximation, in this work we focus on the analysis of temperature dependent lattice geometries, thermal expansion coefficients, elastic constants and ultimate strength of graphene and graphyne.
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Line defects in Graphene: How doping affects the electronic and mechanical properties [PDF]
, 2016 Graphene and carbon nanotubes have extraordinary mechanical and electronic properties. Intrinsic line defects such as local non-hexagonal reconstructions or grain boundaries, however, significantly reduce the tensile strength, but feature exciting electronic properties.
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