Results 11 to 20 of about 235,245 (284)
Crack tip fields and fracture resistance parameters based on strain gradient plasticity [PDF]
International Journal of Solids and Structures (2020), 2020 The crack tip mechanics of strain gradient plasticity solids is investigated analytically and numerically. A first-order mechanism-based strain gradient (MSG) plasticity theory based on Taylor's dislocation model is adopted and implemented in the ...
Martínez-Pañeda, E +3 more
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Gradient-enhanced statistical analysis of cleavage fracture [PDF]
European Journal of Mechanics A/Solids (2019), 2019 We present a probabilistic framework for brittle fracture that builds upon Weibull statistics and strain gradient plasticity. The constitutive response is given by the mechanism-based strain gradient plasticity theory, aiming to accurately characterize ...
Martínez-Pañeda, Emilio +2 more
core +7 more sources
Journal of Materials Research and TechnologyThe hetero-zone boundary affected region (HBAR), with a high strain gradient, plays a crucial role in the synergistic deformation of layered materials. Our previous experimental study demonstrated that a decreasing interfacial spacing leads to a higher ...
Hao Ran +8 more
doaj +3 more sources
Mode I crack tip fields: Strain gradient plasticity theory versus J2 flow theory [PDF]
European Journal of Mechanics A/Solids (2019), 2019 The mode I crack tip asymptotic response of a solid characterised by strain gradient plasticity is investigated. It is found that elastic strains dominate plastic strains near the crack tip, and thus the Cauchy stress and the strain state are given asymptotically by the elastic K-field.
Emilio Martínez‐Pañeda, N.A. Fleck
openalex +2 more sources
Mode I and Mode II stress intensity factors and dislocation density behaviour in strain gradient plasticity [PDF]
arXiv, 2021 In this study, we use the mechanism-based strain gradient plasticity theory to evaluate both crack tip dislocation density behaviour and the coupled effect of the material plastic properties and the intrinsic material length on non-linear amplitude factors.
V. Shlyannikov +3 more
semanticscholar +2 more sources
Strain Gradient Plasticity Applied to Material Cutting [PDF]
Advanced Materials Research, 2011 To better understand the complex phenomena involved in the cutting process is to better qualify the behaviour law used in the simulatiotrn of machining processes (analytical and finite element modeling). The aim of this paper is to present the choices made regarding the behaviour law in this context, indeed, commonly used behaviour laws such as Jonhson-
Royer, Raphaël +2 more
openaire +7 more sources
A Review on Strain Gradient Plasticity Approaches in Simulation of Manufacturing Processes
Journal of Manufacturing and Materials Processing, 2020 Predicting the performances of a manufactured part is extremely important, especially for industries in which there is almost no room for uncertainties, such as aeronautical or automotive.
Raffaele Russo +3 more
doaj +2 more sources
Bounds on the elastic threshold for problems of dissipative strain-gradient plasticity [PDF]
, 2020 This work is concerned with the purely dissipative version of a well-established model of rate-independent strain-gradient plasticity. In the conventional theory of plasticity the approach to determining plastic flow is local, and based on the stress distribution in the body. For the dissipative problem of strain-gradient plasticity such an approach is
B. Reddy, S. Sysala
semanticscholar +2 more sources
Thermomechanical formulation of strain gradient plasticity for geomaterials [PDF]
Journal of Mechanics of Materials and Structures, 2006 Constitutive formulation of strain gradient plasticity for geomaterials via a thermomechanical approach is investigated in this paper. It is demonstrated that, by defining two thermodynamical potentials (a free-energy function and a rate of dissipation function), the entire constitutive behavior of a decoupled strain-gradient-dependent material may be ...
Zhao, Jidong +2 more
openaire +4 more sources
Some properties of the dissipative model of strain-gradient plasticity [PDF]
Philosophical Magazine, 2017 26 pages, 10 ...
Carstensen, C. +4 more
openaire +7 more sources