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Artykuły w czasopismach na temat "Dislocation discrète"
Huang, C. C., C. C. Yu i Sanboh Lee. "The behavior of screw dislocations dynamically emitted from the tip of a surface crack during loading and unloading". Journal of Materials Research 10, nr 1 (styczeń 1995): 183–89. http://dx.doi.org/10.1557/jmr.1995.0183.
Pełny tekst źródłaHolec, David, i Antonín Dlouhý. "Stability and Motion of Low Angle Dislocation Boundaries in Precipitation Hardened Crystals". Materials Science Forum 482 (kwiecień 2005): 159–62. http://dx.doi.org/10.4028/www.scientific.net/msf.482.159.
Pełny tekst źródłaGurrutxaga-Lerma, Beñat, Daniel S. Balint, Daniele Dini, Daniel E. Eakins i Adrian P. Sutton. "A dynamic discrete dislocation plasticity method for the simulation of plastic relaxation under shock loading". Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 469, nr 2156 (8.08.2013): 20130141. http://dx.doi.org/10.1098/rspa.2013.0141.
Pełny tekst źródłaDiop, Mouhamadou, Hai Hao, Han Wei Dong i Xing Guo Zhang. "Simulation of Discrete Dislocation Statics and Dynamics of Magnesium Foam". Materials Science Forum 675-677 (luty 2011): 929–32. http://dx.doi.org/10.4028/www.scientific.net/msf.675-677.929.
Pełny tekst źródłaLi, Luo, i Tariq Khraishi. "An Investigation of Spiral Dislocation Sources Using Discrete Dislocation Dynamics (DDD) Simulations". Metals 13, nr 8 (6.08.2023): 1408. http://dx.doi.org/10.3390/met13081408.
Pełny tekst źródłaMastorakos, Ioannis N., Firas E. Akasheh i Hussein M. Zbib. "Treating internal surfaces and interfaces in discrete dislocation dynamics". Journal of the Mechanical Behaviour of Materials 20, nr 1-3 (1.12.2011): 13–20. http://dx.doi.org/10.1515/jmbm.2011.002.
Pełny tekst źródłaZáležák, Tomáš, i Antonín Dlouhý. "3D Discrete Dislocation Modelling of High Temperature Plasticity". Key Engineering Materials 465 (styczeń 2011): 115–18. http://dx.doi.org/10.4028/www.scientific.net/kem.465.115.
Pełny tekst źródłaStricker, Markus, Michael Ziemann, Mario Walter, Sabine M. Weygand, Patric Gruber i Daniel Weygand. "Dislocation structure analysis in the strain gradient of torsion loading: a comparison between modelling and experiment". Modelling and Simulation in Materials Science and Engineering 30, nr 3 (8.02.2022): 035007. http://dx.doi.org/10.1088/1361-651x/ac4d77.
Pełny tekst źródłaliu, F. X., A. C. F. Cocks i E. Tarleton. "Dislocation dynamics modelling of the creep behaviour of particle-strengthened materials". Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 477, nr 2250 (czerwiec 2021): 20210083. http://dx.doi.org/10.1098/rspa.2021.0083.
Pełny tekst źródłaMesarovic, Sinisa. "Plasticity of crystals and interfaces: From discrete dislocations to size-dependent continuum theory". Theoretical and Applied Mechanics 37, nr 4 (2010): 289–332. http://dx.doi.org/10.2298/tam1004289m.
Pełny tekst źródłaRozprawy doktorskie na temat "Dislocation discrète"
Gonzalez, Joa Javier Antonio. "Mesoscale dislocation simulation accounting for surfaces using the superposition method : Application to nanomechanics". Electronic Thesis or Diss., Lyon, INSA, 2022. http://www.theses.fr/2022ISAL0129.
Pełny tekst źródłaNano-objects (wires, particles, thin films) are known for their outstanding mechanical properties when compared to their bulk counterparts. Various experimental techniques (transmission and scanning electron microscopy, X-ray diffraction) are used to investigate nano-objects, all complemented by computational approaches such as molecular dynamics. While modelling atomic-scale processes in the details, molecular dynamics is limited in terms of sample size and strain rates opening doors to other methods such as the discrete dislocation dynamics. Discrete dislocation dynamics is able to describe the evolution of a dislocation population at the mesoscale but is mostly used to describe quasi-infinite ensembles using either particularly large simulation cells or relying on periodic boundary conditions. Consequently, standalone discrete dislocation dynamics cannot provide a complete description of sample surfaces that are known to be at the roots of several nanoscale processes. This study aims at better and faithfully model the mechanics of nano-objects accounting for the complex interactions between dislocations and surfaces. For this purpose, a new tool called El-Numodis was developed. El-Numodis relies on the coupling of the discrete dislocation dynamics code Numodis with the finite elements code Elmer using the superposition method in which the stress field generated by a dislocation population is corrected at the virtual surfaces of a finite-size sample using a finite-element elastic solver. In this work, we present the main development stages of El-Numodis (coupling drivers, dislocation image forces, nucleation algorithm, etc.) as well as several applications including analytically soluble elasticity problems in which surfaces are involved. As an example, the modelling of face-centered cubic metal thin films practically demonstrates the influence of surfaces on nano-objects mechanics. Finally, El-Numodis is used to model the mechanics of ceramics nanoparticles for which atomistically-informed dislocation nucleation as combined to the transition state theory allow to investigate the role of size, temperature and strain rate on the mechanical properties of MgO nanoparticles
Siska, Filip. "Simulation numérique du comportement mécanique des films minces métalliques par la théorie continue et la dynamique discrète des dislocations". Phd thesis, École Nationale Supérieure des Mines de Paris, 2007. http://tel.archives-ouvertes.fr/tel-00204422.
Pełny tekst źródłaShin, Chansun. "3D discrete dislocation dynamics applied to dislocation-precipitate interactions". Grenoble INPG, 2004. http://www.theses.fr/2004INPG0116.
Pełny tekst źródłaThe 3D Discrete Dislocation Dynamics (DDD) method has been applied to investigate the effects of precipitates on the plasticity of FCC single crystals. A method to represent the internal interfaces by a series of facets with a pre-defined strength has been proposed. For a full account of the mutual elastic interactions between dislocations and second-phase particles, the coupling method with a finite element method is extended. In order to accelerate the computing time, the serial 3D DDD algorithm has been improved by revisiting the 'box method' and a new parallel code has been developed using the standard Message passing Interface (MPI). The image stresses due to a three-dimensional particle were computed using the FEM/DDD coupling code. The numerical results have been compared to the corresponding analytical solutions. The effect of the elastic modulus mismatch on the flow stress and the subsequent hardening behavior has then been analyzed. The image stresses were found to affect significantly the work hardening and the local events such as cross slip and climb. Finally, the fatigue of precipitate-hardened materials was simulated using the new parallel DDD code. The effects of shearable and non-shearable particles on the fatigue properties were well reproduced by the simulations, and the numerical results showed good agreements with the available experimental observations in a qualitative way. The mechanism of the intense slip band formation is proposed from the observation of the simulated dislocation microstructure
Liu, Bing [Verfasser]. "Discrete dislocation dynamics simulations of dislocation : low angle grain boundary interactions / Bing Liu". Aachen : Hochschulbibliothek der Rheinisch-Westfälischen Technischen Hochschule Aachen, 2012. http://d-nb.info/1027743900/34.
Pełny tekst źródłaMohammad, Davoudi Kamyar. "Plastic Behavior of Polycrytalline Thin Films: Discrete Dislocation Study". Thesis, Harvard University, 2014. http://dissertations.umi.com/gsas.harvard:11634.
Pełny tekst źródłaEngineering and Applied Sciences
Bizet, Laurent. "Caractérisation et modélisation du comportement thermomécanique des matériaux métalliques : vers la prise en compte des hétérogénéités micro-structurales intrinsèques". Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAA001/document.
Pełny tekst źródłaTo obtain a relevant shape of a formed part during its finite element simulation, several steps are needed: thermo-mechanical caracterization of the material, definition of the most relevant model and integration of this model in the FE software and finally after data converting and computing processes. The modelling step include, among other things, the identification of the most appropriate model to fit the experimental material behaviour. Those models are essentially developped within the framework of continuum mechanics (CM). A strong, if not the main assumption of the CM consists in considering that mechanical description variables are continuous and differentiable. However, the basic knowledge of metallurgy indicates that local data in metallic materials are discontinuous. For metallic materials, the majority of constitutive models are based on the definition of a representative elementary volume (REV). This REV is supposed to be large enough to erase the incidence of local heterogeneities. Then those constitutive models are assumed to be homogeneous.The aim of this work is to show that introducing local heterogeneities in the description of constitutive models is relevant and contribute to improve the simulation accuracy. Those models also provide an enlargement of the simulation predictive potential. Then an elasto-plastic model, based on local heterogeneities description, is proposed
Korzeczek, Laurent. "Modélisation mésoscopique en 3D par le modèle Discret-Continu de la stabilité des fissures courtes dans les métaux CFC". Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLC049/document.
Pełny tekst źródłaThe erratic behaviour of short cracks propagation under low cyclic loading in ductile metals is commonly attributed to a complex interplay between stabilisation mechanisms that occur at the mescopic scale. Among these mechanisms, the interaction with the existing dislocation microstructure play a major role. The dislocation microstructure is source of plastic deformation and heat transfer that reduce the specimen stored elastic energy, screen the crack field due to its self generated stress field or change the crack geometry through blunting mechanisms. For the first time, these mechanisms are investigated with 3D-DD simulations using the Discrete- Continuous Model, modelling three different crack orientations under monotonic traction loading promoting mode I crack opening.Surprisingly, screening and blunting effects do not seem to have a key role on mode I crack stabilisation. Rather, the capability of the specimen to deform plastically without strong forest hardening is found to be the leading mechanism. Additional investigations of two different size effects confirm those results and show the minor contribution of a polarised dislocations density and the associated kinematic hardening on crack stabilisation
Hosseinzadeh, Delandar Arash. "Numerical Modeling of Plasticity in FCC Crystalline Materials Using Discrete Dislocation Dynamics". Licentiate thesis, KTH, Materialteknologi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-175424.
Pełny tekst źródłaQC 20151015
Perrin, Camille. "Etude expérimentale et modélisation des microstructures de déformation plastique intragranulaires discrètes". Thesis, Metz, 2010. http://www.theses.fr/2010METZ030S/document.
Pełny tekst źródłaThe improvement of the materials characterization techniques in the last years has given access to new important information about the microstructure of polycrystalline metals. From experimental studies of deformed polycrystals, plastic strain within grains is known to be strongly heterogeneous and intermittent. As a consequence of the collective motion of dislocations, sample surfaces are indeed characterized by the presence of slip lines and slip bands (as slip traces). In the present study, a new micromechanical approach is developed to derive the mechanical fields (stresses, distortion, lattice curvature, elastic energy) arising from the presence of an inelastic strain field representing a typical internal "microstructure" as the one observed during the plastification of metallic polycrystals. This "microstructure" is due to the formation of discrete (spatial-temporal) intra-granular plastic slip heterogeneities which are modelled using discrete distributions of circular glide dislocation loops for a grain embedded in an infinite elastic matrix. Then, field equations have been solved using the method of Fourier Transforms. In contrast with the mean field approach based on the Eshelby formalism, it is then found that stress and lattice curvature fields are not more uniform inside the grain. A grain boundary layer actually appears where strong gradients occur and whose thickness depends on the introduced internal lengths. These results are compared with experimental measurements of local lattice rotation fields obtained by orientation imaging mapping (OIM). The model is able to capture different behaviours between near grain boundary regions and grain interior. The model was also develop to allow the study of more complex microstructures like the dislocation cells
Al, Haj Mohammad. "Modèles discrets de dislocations : ondes progressives et dynamique de particules". Thesis, Paris Est, 2014. http://www.theses.fr/2014PEST1001/document.
Pełny tekst źródłaThis work focuses on the study of the dislocation dynamics in the crystal lattice and it is splitted into two parts : the first part is concerned with the horizontal motion of a chain of interacting atoms containing a dislocation. While, the second part deals with the accumulation of dislocations forming what is known as walls of dislocations. In the first part, we consider a fully nonlinear generalization of the discrete reaction diffusion equations “fully overdamped Frenkel-Kontorova models” that describe the dynamics of crystal defects (dislocations) in a lattice. We study both : the bistable and the monostable non-linearities. Under sufficient conditions, we show the existence and uniqueness of traveling wave solution for the bistable non-linearity case. For the monostable case, we study the existence of branch of traveling waves solutions for general Lipschitz non-linearity. We also prove that the minimal velocity is non-negative and bounded below. In this part, we as well study the generalization of Frenkel-Kontorova model for which we can add a driving force parameter. We also illustrate, in this case, the variation of the velocity of propagation of traveling waves in terms of the parameter force. In the second part, we study the accumulation of dislocations in walls of dislocations. We prove actually the convergence of several interacting dislocations to walls of dislocations. We also present results of some numerical experiments that confirm the theoretical results that we obtain
Książki na temat "Dislocation discrète"
Cui, Yinan. The Investigation of Plastic Behavior by Discrete Dislocation Dynamics for Single Crystal Pillar at Submicron Scale. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-3032-1.
Pełny tekst źródłaDavoudi, Kamyar Mohammad. Plastic Behavior of Polycrytalline Thin Films: Discrete Dislocation Study. 2014.
Znajdź pełny tekst źródłaCui, Yinan. Investigation of Plastic Behavior by Discrete Dislocation Dynamics for Single Crystal Pillar at Submicron Scale. Springer, 2016.
Znajdź pełny tekst źródłaCui, Yinan. The Investigation of Plastic Behavior by Discrete Dislocation Dynamics for Single Crystal Pillar at Submicron Scale. Springer, 2018.
Znajdź pełny tekst źródłaCui, Yinan. The Investigation of Plastic Behavior by Discrete Dislocation Dynamics for Single Crystal Pillar at Submicron Scale. Springer, 2016.
Znajdź pełny tekst źródłaCzęści książek na temat "Dislocation discrète"
Giessen, E. "Discrete Dislocation Plasticity". W Thermodynamics, Microstructures and Plasticity, 285–300. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-010-0219-6_18.
Pełny tekst źródłaGiessen, E., i A. Needleman. "Discrete Dislocation Plasticity". W Handbook of Materials Modeling, 1115–31. Dordrecht: Springer Netherlands, 2005. http://dx.doi.org/10.1007/1-4020-3286-2_56.
Pełny tekst źródłaGiessen, Erik. "Discrete Dislocation Plasticity". W Mechanics of Microstructured Materials, 259–82. Vienna: Springer Vienna, 2004. http://dx.doi.org/10.1007/978-3-7091-2776-6_8.
Pełny tekst źródłaVan der Giessen, E., i A. Needleman. "Discrete Dislocation Plasticity". W Handbook of Materials Modeling, 1115–31. Dordrecht: Springer Netherlands, 2005. http://dx.doi.org/10.1007/978-1-4020-3286-8_56.
Pełny tekst źródłaZbib, Hussein M. "Introduction to Discrete Dislocation Dynamics". W Generalized Continua and Dislocation Theory, 289–317. Vienna: Springer Vienna, 2012. http://dx.doi.org/10.1007/978-3-7091-1222-9_4.
Pełny tekst źródłaZbib, Hussein M., Masato Hiratani i Mutasem Shehadeh. "Multiscale Discrete Dislocation Dynamics Plasticity". W Continuum Scale Simulation of Engineering Materials, 201–29. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2005. http://dx.doi.org/10.1002/3527603786.ch8.
Pełny tekst źródłaAriza, M. P., A. Ramasubramaniam i M. Ortiz. "Discrete Dislocation Dynamics in Crystals". W Progress in Industrial Mathematics at ECMI 2006, 387–91. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-71992-2_58.
Pełny tekst źródłaEl-Achkar, T., i Daniel Weygand. "Discrete dislocation dynamics study of dislocation microstructure during cyclic loading". W Fatigue of Materials at Very High Numbers of Loading Cycles, 395–416. Wiesbaden: Springer Fachmedien Wiesbaden, 2018. http://dx.doi.org/10.1007/978-3-658-24531-3_18.
Pełny tekst źródłaLi, Luo, i Tariq Khraishi. "3D Discrete Dislocation Dynamics Simulations of Multiple Spiral Dislocation Sources". W The Minerals, Metals & Materials Series, 969–77. Cham: Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-50349-8_83.
Pełny tekst źródłaLeSar, Richard, i Laurent Capolungo. "Advances in Discrete Dislocation Dynamics Simulations". W Handbook of Materials Modeling, 1079–110. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-319-44677-6_85.
Pełny tekst źródłaStreszczenia konferencji na temat "Dislocation discrète"
Tan, E. H., i L. Z. Sun. "Dislocation Dynamics Modeling for Yield Strength of Nanoscale Film Heterostructures". W ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-79222.
Pełny tekst źródłaYin, X., i K. Komvopoulos. "A Discrete Dislocation Plasticity Analysis of Plane-Strain Indentation of a Single-Crystal Half-Space by a Smooth and a Rough Rigid Asperity". W STLE/ASME 2010 International Joint Tribology Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ijtc2010-41155.
Pełny tekst źródłaSandfeld, S., M. Zaiser, T. Hochrainer, Theodore E. Simos, George Psihoyios i Ch Tsitouras. "Expansion of Quasi-Discrete Dislocation Loops in the Context of a 3D Continuum Theory of Curved Dislocations". W NUMERICAL ANALYSIS AND APPLIED MATHEMATICS: International Conference on Numerical Analysis and Applied Mathematics 2009: Volume 1 and Volume 2. AIP, 2009. http://dx.doi.org/10.1063/1.3241264.
Pełny tekst źródłaVoskoboinikov, R. E., Anatoly S. Avilov, Sergei L. Dudarev i Laurence D. Marks. "Asymptotics in discrete dislocation pile-up modelling". W ELECTRON MICROSCOPY AND MULTISCALE MODELING- EMMM-2007: An International Conference. AIP, 2008. http://dx.doi.org/10.1063/1.2918102.
Pełny tekst źródłaGreer, Julia R., Ju-Young Kim i Steffen Brinckmann. "In-Situ Investigation of Plasticity at Nano-Scale". W ASME 2008 9th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2008. http://dx.doi.org/10.1115/esda2008-59117.
Pełny tekst źródłaBarrera, Olga, i Alan C. F. Cocks. "Computational Modelling of Hydrogen Embrittlement in Weld Joints of Subsea Oil and Gas Components". W ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/omae2013-10119.
Pełny tekst źródłaDutta, B. K., P. V. Durgaprasad, A. K. Pawar, H. S. Kushwaha i S. Banerjee. "Modelling of Irradiated Materials". W 14th International Conference on Nuclear Engineering. ASMEDC, 2006. http://dx.doi.org/10.1115/icone14-89685.
Pełny tekst źródłaMukherjee, Subhasis, Bite Zhou, Abhijit Dasgupta i Thomas R. Bieler. "Mechanistic Modeling of the Anisotropic Steady State Creep Response of SnAgCu Single Crystal". W ASME 2015 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems collocated with the ASME 2015 13th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/ipack2015-48710.
Pełny tekst źródłaSenger, J., D. Weygand, O. Kraft, P. Gumbsch, Theodore E. Simos, George Psihoyios, Ch Tsitouras i Zacharias Anastassi. "Dislocation Microstructure Evolution in Cyclically Twisted Micrometer-Sized Metallic Samples: A Discrete Dislocation Dynamics Analysis". W NUMERICAL ANALYSIS AND APPLIED MATHEMATICS ICNAAM 2011: International Conference on Numerical Analysis and Applied Mathematics. AIP, 2011. http://dx.doi.org/10.1063/1.3637919.
Pełny tekst źródłaTran, H. S., H. Tummala, L. Duchene, T. Pardoen, M. Fivel i A. M. Habraken. "Quasicontinuum analysis of dislocation-coherent twin boundary interaction to provide local rules to discrete dislocation dynamics". W PROCEEDINGS OF THE INTERNATIONAL CONFERENCE OF GLOBAL NETWORK FOR INNOVATIVE TECHNOLOGY AND AWAM INTERNATIONAL CONFERENCE IN CIVIL ENGINEERING (IGNITE-AICCE’17): Sustainable Technology And Practice For Infrastructure and Community Resilience. Author(s), 2017. http://dx.doi.org/10.1063/1.5008190.
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