Non-singular dislocation continuum theories: strain gradient elasticity vs. Peierls–Nabarro model
نویسندگان
چکیده
منابع مشابه
The Physics of Singular Dislocation Structures in Continuum Dislocation Dynamics
Dislocations play an important role in the deformation behaviors of metals. They not only interact via long-range elastic stress, but also interact with short-range interactions; they annihilate, tangle, get stuck, and unstuck. These interaction between dislocations lead to interesting dislocation wall formation at the mesoscales. A recently developed continuum dislocation dynamics model that s...
متن کاملDerivation of Higher Order Gradient Continuum Theories in 2,3-d Non-linear Elasticity from Periodic Lattice Models
SOLIDS THAT I:XHIUIT localization of deformation (in the form of shear bands) at sufficiently high levels of strain, are ftrcquently modeled by gradient type non-local constitutive laws. i.e. continuum theories that include higher order deformation gradients. These models incorporate a length scale for the localized deformation zone and are either postulated or justified from micromechanical co...
متن کاملAnalysis of stress field of a screw dislocation inside an embedded nanowire using strain gradient elasticity
K.M. Davoudi, M.Yu. Gutkin and H.M. Shodja* Department of Civil Engineering, Center of Excellence in Structures and Earthquake Engineering, Sharif University of Technology, 11155-9313 Tehran, Iran Institute of Problems of Mechanical Engineering, Russian Academy of Sciences, Bolshoj 61, Vasil. Ostrov, St. Petersburg 199178, Russia Department of Physics of Materials Strength and Plasticity, St. P...
متن کاملComputational Evaluation of Strain Gradient Elasticity Constants
Classical effective descriptions of heterogeneous materials fail to capture the influence of the spatial scale of the heterogeneity on the overall response of components. This influence may become important when the scale at which the effective continuum fields vary approaches that of the microstructure of the material and may then give rise to size effects and other deviations from the classic...
متن کاملTraumatic First Time Shoulder Dislocation: Surgery vs Non-Operative Treatment
Management of first shoulder dislocation following reduction remains controversial. The two main options are immobilisation and arthroscopic stabilisation. The aim of this article is to highlight some of the issues that influence decision making when discussing management options with these patients, including natural history of the first time dislocation, outcomes of surgery and non-operati...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Philosophical Magazine
سال: 2017
ISSN: 1478-6435,1478-6443
DOI: 10.1080/14786435.2017.1375608