Results 71 to 80 of about 9,231 (286)
Plasticity of crystals and interfaces: From discrete dislocations to size-dependent continuum theory [PDF]
Theoretical and Applied Mechanics, 2010 In this communication, we summarize the current advances in size-dependent continuum plasticity of crystals, specifically, the rate-independent (quasistatic) formulation, on the basis of dislocation mechanics.
Mesarovic Sinisa Đ.
doaj +1 more source
Defects in Crystalline Packings of Twisted Filament Bundles: I. Continuum Theory of Disclinations
, 2011 We develop the theory of the coupling between in-plane order and out-of-plane geometry in twisted, two-dimensionally ordered filament bundles based on the non-linear continuum elasticity theory of columnar materials.
Grason, Gregory M.
core +1 more source
Length-scale effect due to periodic variation of geometrically necessary dislocation densities
International Journal of Plasticity, 2013 Abstract Strain gradient plasticity theories have been successful in predicting qualitative aspects of the length scale effect, most notably the increase in yield strength and hardness as the size of the deforming volume decreases. However new experimental methodologies enabled by recent developments of high spatial resolution diffraction methods in ...
Oeztop, Muin S. +2 more
openaire +2 more sources
Toughening β‐Ga2O3 via Mechanically Seeded Dislocations
Advanced Functional Materials, EarlyView.β‐Ga2O3 is promising for next‐generation semiconductors but its brittleness limits flexible and high‐precision applications. Here, mechanically seeded dislocations introduced by surface deformation improved damage tolerance in (001) β‐Ga2O3. Nanoindentation and characterization show dislocations suppress cleavage cracks by enabling stable plastic ...
Zanlin Cheng +5 more
wiley +1 more source
Plastic dislocation and incompatibility density as indicators for residual stresses [PDF]
, 2019 Residual stresses in forming simulations are typically investigated by analyzing the remaining stress state after removing all external loadings. However, the generation of the stress state during forming remains unknown.
Landkammer, Philipp, Steinmann, Paul
core
An algebraic description of screw dislocations in SC and BCC crystal lattices
, 2018 We give an algebraic description of screw dislocations in a crystal, especially simple cubic (SC) and body centered cubic (BCC) crystals, using free abelian groups and fibering structures.
Hamada, Hiroyasu +4 more
core +1 more source
Geometrically necessary dislocation density distributions in Ti–6Al–4V deformed in tension
Acta Materialia, 2011 Abstract We have used cross-correlation-based analysis of electron backscatter diffraction patterns to map lattice rotations in polycrystalline samples of Ti–6Al–4V before and after moderate (6%) tensile deformation. The sensitivity is improved compared to conventional Hough-based indexing and allows the density of geometrically necessary ...
Littlewood, P, Britton, T, Wilkinson, A
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Advanced Functional Materials, EarlyView.Dual‐cation site engineering unlocks stable and fast sodium storage in Na4VMn(PO4)3 cathodes. Li+ at Na2 suppresses Jahn‐Teller distortion, while K+ at Na1 expands ion channels, enabling synchronized V/Mn redox and quasi‐single‐phase kinetics. This atomic‐level strategy achieves ultralong cycling stability, high‐rate capability, and full cell viability
Jiaze Sun +8 more
wiley +1 more source
Hardness-Depth Relationship with Temperature Effect for Single Crystals—A Theoretical Analysis
Crystals, 2020 In this paper, a mechanistic model is developed to address the effect of temperature on the hardness-depth relationship of single crystals. Two fundamental hardening mechanisms are considered in the hardness model, including the temperature dependent ...
Hao Liu, Long Yu, Xiazi Xiao
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Density-based crystal plasticity : from the discrete to the continuum
, 2016 Because of the enormous range of time and space scales involved in dislocation dynamics, plastic modeling at macroscale requires a continuous formulation.
Appolaire, B. +3 more
core +2 more sources