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Relevant bibliographies by topics / Dislocation field mechanics

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Journal articles

Academic literature on the topic 'Dislocation field mechanics'

Author: Grafiati

Published: 8 February 2025

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Journal articles on the topic "Dislocation field mechanics"

1

Beyerlein, I. J., and A. Hunter. "Understanding dislocation mechanics at the mesoscale using phase field dislocation dynamics." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 374, no. 2066 (2016): 20150166. http://dx.doi.org/10.1098/rsta.2015.0166.

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In this paper, we discuss the formulation, recent developments and findings obtained from a mesoscale mechanics technique called phase field dislocation dynamics (PFDD). We begin by presenting recent advancements made in modelling face-centred cubic materials, such as integration with atomic-scale simulations to account for partial dislocations. We discuss calculations that help in understanding grain size effects on transitions from full to partial dislocation-mediated slip behaviour and deformation twinning. Finally, we present recent extensions of the PFDD framework to alternative crystal s

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2

Fressengeas, Claude, and Vincent Taupin. "Revisiting the Application of Field Dislocation and Disclination Mechanics to Grain Boundaries." Metals 10, no. 11 (2020): 1517. http://dx.doi.org/10.3390/met10111517.

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We review the mechanical theory of dislocation and disclination density fields and its application to grain boundary modeling. The theory accounts for the incompatibility of the elastic strain and curvature tensors due to the presence of dislocations and disclinations. The free energy density is assumed to be quadratic in elastic strain and curvature and has nonlocal character. The balance of loads in the body is described by higher-order equations using the work-conjugates of the strain and curvature tensors, i.e., the stress and couple-stress tensors. Conservation statements for the translat

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3

ROY, A. "Finite element approximation of field dislocation mechanics." Journal of the Mechanics and Physics of Solids 53, no. 1 (2005): 143–70. http://dx.doi.org/10.1016/j.jmps.2004.05.007.

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4

Mironova, M., V. Selvamanickam, D. F. Lee, and K. Salama. "TEM studies of dislocations in deformed melt-textured YBa2Cu3Ox superconductors." Journal of Materials Research 8, no. 11 (1993): 2767–73. http://dx.doi.org/10.1557/jmr.1993.2767.

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TEM studies have been conducted on melt-textured YBa2Cu3Ox samples that were uniaxially and isostatically deformed at high temperatures and compared with those of undeformed samples. Dislocation pile-ups along [100] and [010] are found to be the common feature between undeformed samples with the best Jc and the uniaxially deformed samples, and are suggested to be responsible for enhanced pinning when the magnetic field (H) is applied parallel to the a-b plane. Dislocation loops, tangles, and arrays are also observed, and are considered to contribute to pinning in field orientations other than

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5

Mesarovic, Sinisa. "Plasticity of crystals and interfaces: From discrete dislocations to size-dependent continuum theory." Theoretical and Applied Mechanics 37, no. 4 (2010): 289–332. http://dx.doi.org/10.2298/tam1004289m.

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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. A particular emphasis is placed on relaxation of slip at interfaces. This unsolved problem is the current frontier of research in plasticity of crystalline materials. We outline a framework for further investigation, based on the developed theory for the bulk crystal. The bulk theory is based on the concept of geometrically necessary dislocations, specifically, on configurations where di

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6

Puri, Saurabh, Amit Das, and Amit Acharya. "Mechanical response of multicrystalline thin films in mesoscale field dislocation mechanics." Journal of the Mechanics and Physics of Solids 59, no. 11 (2011): 2400–2417. http://dx.doi.org/10.1016/j.jmps.2011.06.009.

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7

Acharya, Amit. "Constitutive analysis of finite deformation field dislocation mechanics." Journal of the Mechanics and Physics of Solids 52, no. 2 (2004): 301–16. http://dx.doi.org/10.1016/s0022-5096(03)00093-0.

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8

Weertman, J. "Mode III Crack Tip Plastic Zone Solution for Work Hardening Solid Using Dislocation Motion." Journal of Applied Mechanics 56, no. 4 (1989): 976–77. http://dx.doi.org/10.1115/1.3176200.

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The stress and strain field solutions for the stationary mode III crack in small-scale yielding is obtained from a direct physical picture in which the plastic strain is produced by the motion of infinitesimal dislocations. The analysis is based on a shifting center, cylindrical coordinate system. The nonredundant dislocation density is determined. The ratio of nonredundant to redundant dislocation density within the plastic zone may be a useful measure for placing cracks into a brittle class, a ductile class and semibrittle to semiductile classes.

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9

Luo, H. A., and Y. Chen. "An Edge Dislocation in a Three-Phase Composite Cylinder Model." Journal of Applied Mechanics 58, no. 1 (1991): 75–86. http://dx.doi.org/10.1115/1.2897182.

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An exact solution is given for the stress field due to an edge dislocation embedded in a three-phase composite cylinder. The force on the dislocation is then derived, from which a set of simple approximate formulae is also suggested. It is shown that, in comparison with the two-phase model adopted by Dundurs and Mura (1964), the three-phase model allows the dislocation to have a stable equilibrium position under much less stringent combinations of the material constants. As a result, the so-called trapping mechanism of dislocations is more likely to take place in the three-phase model. Also, t

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10

Vivekanandan, Vignesh, Joseph Pierre Anderson, Yash Pachaury, Mamdouh S. Mohamed, and Anter El-Azab. "Statistics of internal stress fluctuations in dislocated crystals and relevance to density-based dislocation dynamics models." Modelling and Simulation in Materials Science and Engineering 30, no. 4 (2022): 045007. http://dx.doi.org/10.1088/1361-651x/ac5dcf.

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Abstract A statistical analysis of internal stress fluctuations, defined as the difference between the local mean stress and stress on dislocations, is presented for deforming crystals with 3D discrete dislocation systems. Dislocation realizations are generated using dislocation dynamics simulations and the associated stress field is computed as a superposition of a regularized stress field of dislocation lines within the domain of the solution and a complementary stress field computed via a finite-element boundary value problem. The internal stress fluctuations of interest are defined by an e

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