Results 31 to 40 of about 3,870,040 (252)
Photonics, 2023 This paper addresses the challenge of strain measurement using distributed fiber-optic sensors based on Rayleigh scattering in the presence of fiber Bragg gratings (FBGs) with a reflectivity level of 70% within the optical fiber. The reflectivity of such
Valerii Matveenko, Grigorii Serovaev
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Strain-gradient-induced switching of nanoscale domains in free-standing ultrathin films [PDF]
, 2014 We report first-principle atomistic simulations on the effect of local strain gradients on the nanoscale domain morphology of free-standing PbTiO$_3$ ultrathin films. First, the ferroelectric properties of free films at the atomic level are reviewed. For
Belletti, G. D. +2 more
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Strain gradient and electric field gradient effects in piezoelectric cantilever beams
Journal of the Mechanical Behavior of Materials, 2015 A piezoelectric beam model with strain gradient and electric gradient effects is proposed. An energy variational principle with strain, strain gradient, electric field, and electric field gradient considered as independent variables is postulated to ...
Yue Yanmei, Xu Kaiyu, Aifantis Elias C.
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Gradients of Strain to Increase Strength and Ductility of Magnesium Alloys
Metals, 2019 A strain gradient was produced in an AZ31B magnesium alloy through a plastic deformation of pure torsion at a torsional speed of π/2 per second. Compared with the base material and with the alloy processed by conventional severe plastic deformation,
Yao Liu, Songlin Cai
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A continuous/discontinuous Galerkin formulation for a strain gradient-dependent damage model: 2D results [PDF]
, 2003 The numerical solution of strain gradient-dependent continuum problems has been hindered by continuity demands on the basis functions. The presence of terms in constitutive models which involve gradients of the strain eld means that the $C^0$ continuity
Garikipati, K, Molari, L, Wells, GN
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On chiral effects in strain gradient elasticity [PDF]
European Journal of Mechanics - A/Solids, 2016 This paper is concerned with the problem of uniformly loaded bars in strain gradient elasticity. We study the deformation of an isotropic chiral bar subjected to body forces, to tractions on the lateral surface and to resultant forces and moments on the ends. Examples of chiral materials include some auxetic materials, bones, some honeycomb structures,
Iesan, Dorin +1 more
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Annealing Behavior of Surface-Locally Cold-Deformed Low-Carbon Steel with a Large Strain Gradient
Metals, 2018 The annealing behavior of surface-locally cold-deformed 0.2 mass% carbon steel with a large strain gradient was investigated, with special attention paid to the change in grain size.
Xianguang Zhang +2 more
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Perspective on hetero-deformation induced (HDI) hardening and back stress
Materials Research Letters, 2019 Heterostructured materials have been reported as a new class of materials with superior mechanical properties, which was attributed to the development of back stress.
Yuntian Zhu, Xiaolei Wu
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A New Method of Fatigue Life Prediction for Notched Specimen
Journal of Aeronautical Materials, 2017 The simulations of the notched specimens under multiaxial loading were conducted by finite element method. The simulation results show that the stress gradient increases with the decrease in notch radius for the same strain path.
JIN Dan, GOU Zhifei
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Strain-gradient effect on the crack tip dislocations density
Fracture and Structural Integrity, 2020 In this study, the influence of a material s plastic properties on the crack tip fields and dislocation density behavior is analytically and numerically analyzed using the conventional mechanism-based strain-gradient plasticity (CMSGP) theory established
Valery Shlyannikov +2 more
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