Results 11 to 20 of about 286,034 (261)
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 crack tip stresses by accounting for the role of plastic strain gradients in elevating local ...
arxiv +1 more source
Gradient Plasticity for Single Crystals [PDF]
PAMM, 2010 AbstractThe kinematic relationship between classical single crystal kinematics and geometrically necessary dislocations will be clarified by a demonstrative example. The starting point for the dynamics is the contribution of geometrically necessary dislocations to the free energy, which leads to a kinematic hardening law. A simple two‐dimensional shear
Wulfinghoff, S., Böhlke, T.
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On-chip Few-shot Learning with Surrogate Gradient Descent on a Neuromorphic Processor [PDF]
, 2019 Recent work suggests that synaptic plasticity dynamics in biological models of neurons and neuromorphic hardware are compatible with gradient-based learning (Neftci et al., 2019).
Neftci, Emre +3 more
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A thermodynamically consistent theory of stress-gradient plasticity [PDF]
, 2020 As an extension to strain-gradient models of size-dependent plastic behaviour, this work proposes a model for a stress-gradient theory. The model is distinguished from earlier works on the topic by its being embedded in a thermodynamically consistent framework.
arxiv +1 more source
A reformulation of strain gradient plasticity [PDF]
Journal of the Mechanics and Physics of Solids, 2001 A class of phenomenological strain gradient plasticity theories is formulated to accommodate more than one material length parameter. The objective is a generalization of the classical J2 3ow theory of plasticity to account for strain gradient e4ects that emerge in deformation phenomena at the micron scale.
John W. Hutchinson, Norman A. Fleck
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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.
arxiv +1 more source
Normality condition in elasticity [PDF]
, 2013 Strong local minimizers with surfaces of gradient discontinuity appear in variational problems when the energy density function is not rank-one convex. In this paper we show that stability of such surfaces is related to stability outside the surface via ...
Grabovsky, Yury, Truskinovsky, Lev
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A mechanism-based gradient damage model for metallic fracture [PDF]
Engineering Fracture Mechanics (2021), 2021 A new gradient-based formulation for predicting fracture in elastic-plastic solids is presented. Damage is captured by means of a phase field model that considers both the elastic and plastic works as driving forces for fracture. Material deformation is characterised by a mechanism-based strain gradient constitutive model. This non-local plastic-damage
arxiv
, 2005 A Phenomenological Mesoscopic Field Dislocation Mechanics (PMFDM) model is developed, extending continuum plasticity theory for studying initial-boundary value problems of small-scale plasticity.
Acharya, Amit, Roy, Anish
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A case of modular phenotypic plasticity in the depth gradient for the gorgonian coral Antillogorgia bipinnata (Cnidaria: Octocorallia) [PDF]
, 2017 Background: Phenotypic plasticity, as a phenotypic response induced by the environment, has been proposed as a key factor in the evolutionary history of corals. A significant number of octocoral species show high phenotypic variation, exhibiting a strong
Calixto-Botía, Iván, Sánchez, Juan A.
core +1 more source