Articoli di riviste: "Mesoscopic mechanics"

1

Sowa, Artur. "Mesoscopic mechanics". Journal of Physics and Chemistry of Solids 65, n. 8-9 (agosto 2004): 1507–15. http://dx.doi.org/10.1016/j.jpcs.2003.12.012.

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Sheng, Yanping, Haichuan Jia, Hongli Lv, Huaxin Chen, Xiaorui Zhao, Runzhi Wang e Jiandang Meng. "Study on Mesoscopic Mechanics of Recycled Asphalt Mixture in the Indirect Tensile Test". Mathematical Problems in Engineering 2020 (17 dicembre 2020): 1–12. http://dx.doi.org/10.1155/2020/6621275.

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Reclaimed asphalt pavement (RAP) mainly contains asphalt binder and aggregates, and the RAP materials used in paving roads could save virgin materials. This paper studied the following: asphalt mixture with different RAP material contents was prepared; then the indirect tensile test was carried out, and the mesoscopic model of the recycled asphalt mixture was reconstructed digitally. Discrete element method (DEM) of indirect tensile test was carried out to analyze the mechanical properties of recycled asphalt mixture in mesoscopic perspective. The results showed that there were some gaps between the simulation result of the digital specimen model and the test value of the recycled asphalt mixture, but the velocity vector and the law of force chain development of the recycled asphalt mixture could be explained in mesoscopic perspective. It proved that the virtual simulation test of the mechanical test was effective. The damage process of recycled asphalt mixture was analyzed in mesoscopic perspective, and the unification of mechanical response and macroscopic appearance was completed. Meanwhile, the simulation method of mesoscopic mechanics was an effective supplement to traditional tests, and guided tests method theoretically.

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Lian, Ye Da, Ren Qiang Wu, Bing Zhang e Tao Feng. "Application of GTN Model in Tensile Fracture of Pipeline Steel". Key Engineering Materials 777 (agosto 2018): 451–56. http://dx.doi.org/10.4028/www.scientific.net/kem.777.451.

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In this paper, the macroscopic mechanical behavior of tensile fracture of X70 pipeline steel is combined with the evolution of mesoscopic pores. The ABAQUS finite element software was used to analyze the variation of pore volume fraction in the tensile failure process of unilateral notched specimens with Gurson-Tvergaard-Needleman (GTN) mesoscopic damage model. Combined with the unilateral notched tensile test and the numerical simulation results, the damage mechanics model of pipeline steel based on void volume fraction is established. The results show that the volume fraction of pores is a mesomechanical parameter based on the damage of the micro-holes in the metallic plastic material, which is a bridge between the mesoscopic damage characteristics and the macro-mechanical parameters. Establishing the damage mechanics model of high strength pipeline steel with hole volume fraction as damage variable can truly reflect the macro-meso-mechanics behavior of X70 pipeline steel during unilateral notching.

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Xie, Guang Qi, e Huan You Wang. "Coarse-graining Mean and Displacement of Granular Matter". Materials Science Forum 1054 (24 febbraio 2022): 63–67. http://dx.doi.org/10.4028/p-a652a3.

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In this paper, we emphasize that the thermodynamic basis of displacement concept is finite equilibrium region and quasi-static process. By considering the dynamic process of a particle system undergoing reversible deformation under external force, the spatial and temporal distributions of mesoscopic mass, mesoscopic mass flow, mesoscopic energy, and mesoscopic stress are calculated using corresponding mesoscopic theory (e.g., Hertz contact mechanics). Their macroscopic correspondence is calculated by means of coarse-grained average, and the resulting macroscopic mass and mass flow are substituted into the equation that defines the displacement, and the displacement is calculated by integration.

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Sun, Ze Ming, Qi Fang Zhu, Zhi Gang Fan, Wen Xia, Shu Feng Liu e Yurii Sharkeev. "A Mesoscopic Mechanics Research on Deformation of 7B04 High Strength Aluminum Alloy". Key Engineering Materials 723 (dicembre 2016): 15–20. http://dx.doi.org/10.4028/www.scientific.net/kem.723.15.

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In this paper, a new method mesoscopic been studied for metal material deformation to fracture process. In the polycrystalline material plastic flow process, mesoscopic structural features was obtained for translation - vortex by digital image correlation principle. A preliminary analytical method of material deformation is established. The behavior of plastic deformation of 7B04 high strength aluminum alloy was analyzed. Grain groups deformation, amount of rotation and the energy dissipation distribution were analyzed. An important deformation features is that micro cracks were bred in severe plastic strain region on mesoscopic scale. Based on the stress concentration, the formation of rotational deformation can be regarded as the beginning of an irreversible damage criterion. The Rotation of grain groups is the reason of the formation of microcracks.

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Domínguez, D., A. R. Bishop e N. Grønbech-Jensen. "Coherence and Complexity in Condensed Matter: Josephson Junction Arrays". International Journal of Bifurcation and Chaos 07, n. 05 (maggio 1997): 979–88. http://dx.doi.org/10.1142/s0218127497000790.

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The importance of the mesoscopic bridge between microscopic and mesoscopic descriptions of complex, nonlinear-nonequilibrium extended dynamical systems is illustrated in a condensed matter context through three-dimensional Josephson junction arrays. Large-scale Langevin molecular dynamics is used to study novel transformer and melting effects, emphasizing the central roles of topological excitations (flux vortex lines) in determining mesoscopic patterns and dynamics — through flux line creation, annihilation, interaction and statistical mechanics.

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Croquette, M., S. Deléglise, T. Kawasaki, K. Komori, M. Kuribayashi, A. Lartaux-Vollard, N. Matsumoto et al. "Recent advances toward mesoscopic quantum optomechanics". AVS Quantum Science 5, n. 1 (marzo 2023): 014403. http://dx.doi.org/10.1116/5.0128487.

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We present a number of approaches, currently in experimental development in our research groups, toward the general problem of macroscopic quantum mechanics, i.e., manifestations of quantum noise and quantum fluctations with macroscopic (engineered and microfabricated by man) mechanical systems. Discussed experiments include a pendulum, a torsion pendulum, a ng-scale phononic-crystal silicon nitride membrane, a [Formula: see text] g-scale quartz resonator, and mg-scale mirrors for optical levitation. We also discuss relevant applications to quantum thermometry with optomechanical systems and the use of squeezed light to probe displacements beyond conventional quantum limits.

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Li, Guodong, e Zonglin Wang. "A Mesoscopic Simulation for the Early-Age Shrinkage Cracking Process of High Performance Concrete in Bridge Engineering". Advances in Materials Science and Engineering 2017 (2017): 1–12. http://dx.doi.org/10.1155/2017/9504945.

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On a mesoscopic level, high performance concrete (HPC) was assumed to be a heterogeneous composite material consisting of aggregates, mortar, and pores. The concrete mesoscopic structure model had been established based on CT image reconstruction. By combining this model with continuum mechanics, damage mechanics, and fracture mechanics, a relatively complete system for concrete mesoscopic mechanics analysis was established to simulate the process of early-age shrinkage cracking in HPC. This process was based on the dispersion crack model. The results indicated that the interface between the aggregate and mortar was the crack point caused by shrinkage cracks in HPC. The locations of early-age shrinkage cracks in HPC were associated with the spacing and the size of the aggregate particle. However, the shrinkage deformation size of the mortar was related to the scope of concrete cracking and was independent of the crack position. Whereas lower water to cement ratios can improve the early strength of concrete, this ratio cannot control early-age shrinkage cracks in HPC.

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Falasco, G., F. Baldovin, K. Kroy e M. Baiesi. "Mesoscopic virial equation for nonequilibrium statistical mechanics". New Journal of Physics 18, n. 9 (22 settembre 2016): 093043. http://dx.doi.org/10.1088/1367-2630/18/9/093043.

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Lykov, Kirill, Yasaman Nematbakhsh, Menglin Shang, Chwee Teck Lim e Igor V. Pivkin. "Probing eukaryotic cell mechanics via mesoscopic simulations". PLOS Computational Biology 13, n. 9 (18 settembre 2017): e1005726. http://dx.doi.org/10.1371/journal.pcbi.1005726.

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Collin, E. "Mesoscopic quantum thermo-mechanics: A new frontier of experimental physics". AVS Quantum Science 4, n. 2 (giugno 2022): 020501. http://dx.doi.org/10.1116/5.0086059.

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In the last decade, experimentalists have demonstrated their impressive ability to control mechanical modes within mesoscopic objects down to the quantum level: it is now possible to create mechanical Fock states, to entangle mechanical modes from distinct objects, and to store quantum information or transfer it from one quantum bit to another, among the many possibilities found in today's literature. Indeed, mechanics is quantum, very much like spins or electromagnetic degrees of freedom; and all of this is, in particular, referred to as a new engineering resource for quantum technologies. However, there is also much more beyond this utilitarian aspect: invoking the original discussions of Braginsky and Caves, where a quantum oscillator is thought of as a quantum detector for a classical field, namely, a gravitational wave, which is also a unique sensing capability for quantum fields. The subject of study is then the baths to which the mechanical mode is coupled to, let them be known or unknown in nature. This Perspective is about this new potentiality that addresses stochastic thermodynamics, potentially down to its quantum version, the search for a fundamental underlying (random) field postulated in recent theories that can be affiliated to the class of the wave-function collapse models, and more generally open questions of condensed matter like the actual nature of the elusive (and ubiquitous) two-level systems present within all mechanical objects. However, such research turns out to be much more demanding than the use of a few quantum mechanical modes: all the known baths have to be identified, experiments have to be conducted in-equilibrium, and the word “mechanics” needs to be justified by a real ability to move substantially the center-of-mass when a proper drive tone is applied to the system.

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Chen, Zhen, Liangqi Zhang e Liming Yang. "Kinetic Theory-Based Methods in Fluid Dynamics". Entropy 25, n. 2 (31 gennaio 2023): 255. http://dx.doi.org/10.3390/e25020255.

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Buehler, Markus J. "Mesoscale modeling of mechanics of carbon nanotubes: Self-assembly, self-folding, and fracture". Journal of Materials Research 21, n. 11 (novembre 2006): 2855–69. http://dx.doi.org/10.1557/jmr.2006.0347.

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Using concepts of hierarchical multiscale modeling, we report development of a mesoscopic model for single-wall carbon nanotubes with parameters completely derived from full atomistic simulations. The parameters in the mesoscopic model are fit to reproduce elastic, fracture, and adhesion properties of carbon nanotubes, in this article demonstrated for (5,5) carbon nanotubes. The mesoscale model enables modeling of the dynamics of systems with hundreds of ultralong carbon nanotubes over time scales approaching microseconds. We apply our mesoscopic model to study self-assembly processes, including self-folding, bundle formation, as well as the response of bundles of carbon nanotubes to severe mechanical stimulation under compression, bending, and tension. Our results with mesoscale modeling corroborate earlier results, suggesting a novel self-folding mechanism, leading to creation of racket-shaped carbon nanotube structures, provided that the aspect ratio of the carbon nanotube is sufficiently large. We find that the persistence length of the (5,5) carbon nanotube is on the order of a few micrometers in the temperature regime from 300 to 1000 K.

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Imry, Yoseph. "Mesoscopic Physics and the Fundamentals of Quantum Mechanics". Physica Scripta T76, n. 1 (1998): 171. http://dx.doi.org/10.1238/physica.topical.076a00171.

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Mosolov, A. "Singular fractal functions and mesoscopic effects in mechanics". Chaos, Solitons & Fractals 4, n. 11 (novembre 1994): 2093–102. http://dx.doi.org/10.1016/0960-0779(94)90123-6.

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16

Li, Ben, Ying Yu, Chen Zhang e Yu Zhang. "Mesoscopic Fracture Model of Coarse Aggregate Interlocking Concrete". Advances in Materials Science and Engineering 2022 (14 giugno 2022): 1–11. http://dx.doi.org/10.1155/2022/3453797.

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The skeleton formed by coarse aggregate has an important influence on the macroscopic mechanical properties of concrete, especially the fracture properties. Based on mesomechanics and fracture mechanics, this paper conducts theoretical simulations and experimental studies on the mechanical and fracture properties of coarse aggregate interlocking concrete through the theory of mesomechanics homogenization as well as compressive strength tests, flexural strength tests, axial compressive strength tests, elastic modulus tests, and fracture toughness tests. The results show that when the coarse aggregate is within a certain volume increase, the fracture energy and ultimate strength of concrete are significantly improved. At the same time, the proposed mesomechanics calculation model has high accuracy for calculating the fracture characteristics of concrete when the coarse aggregate increment is less than 20%.

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Wang, H., e N. J. Halas. "Mesoscopic Au “Meatball” Particles". Advanced Materials 20, n. 4 (18 febbraio 2008): 820–25. http://dx.doi.org/10.1002/adma.200701293.

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18

KITAMURA, Takayuki, e Kisaragi YASHIRO. "Microscopic and Mesoscopic Evaluations of Materials. Molecular Dynamics Simulation of Mesoscopic Fracture." Transactions of the Japan Society of Mechanical Engineers Series A 65, n. 631 (1999): 425–31. http://dx.doi.org/10.1299/kikaia.65.425.

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Fan, Hong-Yi, e Ze Wu. "Characteristic frequency of a three-loop mesoscopic LC circuit with two non-symmetric mutual inductances". Modern Physics Letters B 34, n. 03 (18 dicembre 2019): 2050040. http://dx.doi.org/10.1142/s0217984920500402.

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We use the Invariant eigenoperator (IEO) method to derive characteristic frequency of two-loop and three-loop mesoscopic LC circuit with non-symmetric mutual inductances. By searching for invariant eigenoperators of the Hamiltonian of mesoscopic LC circuits, we can calculate their energy-levels very conveniently. This method is quite concise and effective and has many applications in quantum mechanics. Thus we can calculate energy-levels by searching for invariant eigenoperators.

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Ding, Jianxin, e Qingzhou Yang. "Three-Dimension Random Aggregate Generation of Numerical Concrete Model". MATEC Web of Conferences 206 (2018): 02009. http://dx.doi.org/10.1051/matecconf/201820602009.

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The aggregate generation of concrete is one of the important problems in concrete mesoscopic mechanics. Firstly, the mesoscopic numerical model with spherical aggregates is obtained by the method of excluding the occupied space, and fully-graded concrete model of high aggregate content can be quickly generated. Then, based on the spherical aggregate model, the generation method of random convex polyhedral aggregates is proposed. Finally, a full-graded concrete model with spherical aggregates is shown in Case 1 and a cylindrical concrete model with random convex polyhedral aggregates is shown in Case 2. The result shows that the aggregates are equally distributed in the concrete models which can be used in the study of mesoscopic numerical calculation.

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Zuo, Hong, Zhiqiang Yang, Shouchun Deng e Haibo Li. "High-order asymptotic solutions for gas transport in heterogeneous media with multiple spatial scales". Physics of Fluids 35, n. 1 (gennaio 2023): 013106. http://dx.doi.org/10.1063/5.0130971.

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Subsurface structures generally exhibit strong heterogeneities at multiple spatial scales. In this study, two- and three-scale high-order models are developed to effectively predict nonlinear gas transport in heterogeneous porous media with multiscale configurations. The considered heterogeneous porous media are composed of the matrix and inclusions at the mesoscopic and microscopic scales, respectively. First, using the formal two-scale asymptotic analysis, the homogenized solutions, the two-scale first-order and higher-order solutions are derived, with the first-order and second-order cell functions defined at the mesoscopic cell. Second, by further expanding all the mesoscopic cell functions to the microscopic levels, the second-order expansions of the mesoscopic cell functions are established and the upscaled relationships for the permeability tensor from the microscale to the macroscale are developed accordingly. Finally, the three-scale low-order and high-order solutions are constructed by combining the multiscale expansions of the mesoscopic cell functions and the macro–meso two-scale solutions. Several representative cases are simulated to demonstrate the accuracy and reliability of the proposed multiscale solutions. The results show that the high-order solutions can perfectly capture the locally steep pressure fluctuations and non-equilibrium effects caused by the heterogeneities and large permeability contrast in porous media with two- or three-scale configurations. The strategies to obtain the multiscale high-order solutions follow the reverse thought process of the reiteration homogenization method, and can be easily extended to heterogeneous porous media with arbitrary multiple scales.

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Beck, Christian. "Generalized statistical mechanics for superstatistical systems". Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 369, n. 1935 (28 gennaio 2011): 453–65. http://dx.doi.org/10.1098/rsta.2010.0280.

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Mesoscopic systems in a slowly fluctuating environment are often well described by superstatistical models. We develop a generalized statistical mechanics formalism for superstatistical systems, by mapping the superstatistical complex system onto a system of ordinary statistical mechanics with modified energy levels. We also briefly review recent examples of applications of the superstatistics concept for three very different subject areas, namely train delay statistics, turbulent tracer dynamics and cancer survival statistics.

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Cornelissen, Bo, Bert Rietman, Matthijn de Rooij e Remko Akkerman. "Tow Mechanics: A Contact Mechanics Approach of Friction in Fibrous Tows during Forming". Key Engineering Materials 504-506 (febbraio 2012): 325–30. http://dx.doi.org/10.4028/www.scientific.net/kem.504-506.325.

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Composites forming processes involve mechanical interactions on the ply, tow, and filament level. The deformations that occur during forming processes are governed by friction between tows and tooling material on the mesoscopic level and consequently between filaments within the tows on the microscopic level. A thorough understanding of the frictional properties of individual filaments is essential to understand and to predict the macroscopic deformations of a fabric during forming. This paper provides a global description of the experimental and modelling approaches to explain the contact friction between fibrous tows and metal tooling material, focusing on contact mechanics at the tow and filament scale.

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Nicot, François, Guillaume Veylon, Zhu Huaxiang, Jean Lerbet e Félix Darve. "Mesoscopic Scale Instability in Particulate Materials". Journal of Engineering Mechanics 142, n. 8 (agosto 2016): 04016047. http://dx.doi.org/10.1061/(asce)em.1943-7889.0001100.

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Jixun, Zhang, Shu Jiaqing, Ren Xuhua e Ren Hongyun. "Influence Mechanism of Grouting on Mechanical Characteristics of Rock Mass". Mathematical Problems in Engineering 2013 (2013): 1–6. http://dx.doi.org/10.1155/2013/281817.

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Grouting technology has been widely used in all fields of geotechnical and civil engineering. Prospective engineering objectives including reinforcement of rock mass and groundwater leakage treatment can be achieved by grouting which will change the mechanical parameters of rock mass such as strength, elastic modulus, and coefficient of permeability. In this paper, rock mass is assumed as a composite material consisting of rock particles and random microcracks initially. Since part or all of the cracks will be filled with cement slurry after grouting, rock mass consists of rock particles, grout condensate, and some or no random microcracks after grouting. The damage constitutional law of the mesoscopic element is established based on the theory of mesoscopic damage mechanics. With the heterogeneity of the components of rock mass considered, the variation of mechanical characteristics of rock mass is studied before and after grouting. And the influence mechanism of grouting on rock mass is investigated at mesoscale level.

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MOEENDARBARY, E., T. Y. NG e M. ZANGENEH. "DISSIPATIVE PARTICLE DYNAMICS IN SOFT MATTER AND POLYMERIC APPLICATIONS — A REVIEW". International Journal of Applied Mechanics 02, n. 01 (marzo 2010): 161–90. http://dx.doi.org/10.1142/s1758825110000469.

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Computer simulations and in particular mesoscopic simulation techniques such as the dissipative particle dynamics (DPD) technique, enable researchers to study the complexities of soft material and polymeric systems by performing in silico experimentations alongside in vivo experiments. In addition, these mesoscopic simulations allow scientists and engineers to characterize and optimize the actual experiments in a more efficient manner. The DPD is one the most reliable mesoscopic simulation techniques for phenomenological investigation of soft matter and polymeric systems. In this review, which is complimentary to an earlier review also by the present authors on DPD methodology and complex fluid application (Moeendarbary et al., 2009), we categorize and review the notable published works, and document efforts that applied the DPD simulation technique to various important soft matter and polymeric applications, over the last decade.

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Wang, Shu Hong, Chun An Tang, Juan Xia Zhang e Wan Cheng Zhu. "Implementation of a Mesoscopic Mechanical Model for the Shear Fracture Process Analysis of Masonry". Key Engineering Materials 297-300 (novembre 2005): 1025–31. http://dx.doi.org/10.4028/www.scientific.net/kem.297-300.1025.

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This short paper will present a two-dimensional (2D) model of masonry material. This mesoscopic mechanical model is suitable to simulate the behavior of masonry. Considering the heterogeneity of masonry material, based on the damage mechanics and elastic-brittle theory, the new developed Material Failure Process Analysis (MFPA2D) system was brought out to simulate the cracking process of masonry, which was considered as a three-phase composite of the block phase, the mortar phase and the block-mortar interfaces. The crack propagation processes simulated with this model shows good agreement with those of experimental observations. It has been found that the shear fracture of masonry observed at the macroscopic level is predominantly caused by tensile damage at the mesoscopic level. Some brittle materials are so weak in tension relative to shear that tensile rather than shear fractures are generated in pure shear loading.

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Büttiker, Markus, e Simon E. Nigg. "Mesoscopic capacitance oscillations". Nanotechnology 18, n. 4 (21 dicembre 2006): 044029. http://dx.doi.org/10.1088/0957-4484/18/4/044029.

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Ostermeyer, G. P. "The mesoscopic particle approach". Tribology International 40, n. 6 (giugno 2007): 953–59. http://dx.doi.org/10.1016/j.triboint.2006.02.046.

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Stamps, Robert. "Probing a mesoscopic elephant". Nature Materials 20, n. 2 (18 gennaio 2021): 127–28. http://dx.doi.org/10.1038/s41563-020-00915-y.

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Zhao, Yan, Guo Xin Zhang, Song Nan Ru e Fu Xin Chai. "Simulation of Numerical Test of Concrete Mechanical Properties Base on Numerical Manifold Method". Advanced Materials Research 217-218 (marzo 2011): 1739–42. http://dx.doi.org/10.4028/www.scientific.net/amr.217-218.1739.

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In order to reflect the heterogeneity of concrete at mesoscopic level and simulate the mechanics response from the mesoscopic to macroscopical in the course of load, the random aggregate model according to the Monte Carlo method and Fuller Graded Formula is carried out based on the assumption that the concrete is a multi-phases composite material composed of matrix, and the material parameters are defined based on the test. In this paper, the Numerical Manifold Method introduced not only can correctly simulate stress, deformation and failure of concrete, but can simulate propagation of multi-cracks in the concrete, and failure plane growth can be searched by stress results automatically, so it can simulate the kind high discontinuous problem very well. On this basis, NMM is adopted to simulate the tests on concrete mechanical performance. The creation, propagation and fracture process of cracks in compression of concrete are present. The computational results are in good agreement with the experimental data.

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Xie, Ming, e Shan Suo Zheng. "Study on Fractal Elastic Damage Constitutive Law for Concrete Material under Static Load". Applied Mechanics and Materials 138-139 (novembre 2011): 1269–73. http://dx.doi.org/10.4028/www.scientific.net/amm.138-139.1269.

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The stochastic properties and discreteness of macroscopic property for concrete appear on mechanical property and fracture surface. In consideration of stochastik and discreteness of fracture surface, a class of mesoscopic damage mechanics model of concrete based on spring model, are put forward to understand the real damage evolution characteristics of concrete at the level of constitutional law. A kind of spring-slipper model is introduced to reflect the elastic-plastic damage behavior. It has been confirmed that fracture surface of concrete has self-affine fractal characteristic only on a certain spatial scale, but the actual fracture surface of concrete is a stochastic surface with multi-fractal characteristics. Uniaxial test was operated, combined with the Computerized Tomography test of concrete, to study the evolution of crack surface from mesoscopic level to macroscopic level. Compared with the existing damage constitutive law and experimental results preliminarily, the feasibility of fractal damage constitutive law is verified.

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Li, Zeyu. "Summary of Rock Damage Mechanics Classification". Academic Journal of Science and Technology 12, n. 2 (14 settembre 2024): 270–73. http://dx.doi.org/10.54097/gb5mnf09.

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As an important means to study the mechanical properties and failure mechanism of rock materials and engineering mechanics, damage mechanics is often used to assist in the analysis of the failure process and mechanism of rock, metal, and other materials in the current research. In the use of damage mechanics to study the properties of rock materials and explore the deformation and failure law of rock, important research results have been achieved. The research methods of damage mechanics can be roughly divided into three types: statistical damage model, mesoscopic damage model, and continuous damage model. Based on the existing literature in hand, according to the division of damage mechanics research methods in the academic community, this paper collates and considers that the existing damage model construction can be summarized from the mechanical point of view. The pure theory is derived or fitted from the mathematical point of view. One of them is derived from the mechanism point of view, and the other is derived from the phenomenon point of view. The stress, strain, acoustic emission, and other data are analyzed and reconstructed, and both have advantages and disadvantages.

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März, Benjamin, Kenny Jolley, Thomas James Marrow, Zhaoxia Zhou, Malcolm Heggie, Roger Smith e Houzheng Wu. "Mesoscopic structure features in synthetic graphite". Materials & Design 142 (marzo 2018): 268–78. http://dx.doi.org/10.1016/j.matdes.2018.01.038.

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Neverov, V. V. "Dissipative mesoscopic structures in plastic deformation". Journal of Applied Mechanics and Technical Physics 34, n. 4 (1994): 566–77. http://dx.doi.org/10.1007/bf00851478.

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Mariz, A. M., e C. Tsallis. "Unified long-memory mesoscopic mechanism consistent with nonextensive statistical mechanics". Physics Letters A 376, n. 45 (ottobre 2012): 3088–91. http://dx.doi.org/10.1016/j.physleta.2012.09.015.

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Buzio, R., F. Buatier de Mongeot, C. Boragno e U. Valbusa. "A novel approach for the investigation of mesoscopic contact mechanics". Thin Solid Films 428, n. 1-2 (marzo 2003): 111–14. http://dx.doi.org/10.1016/s0040-6090(02)01231-2.

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Kamenev, Alex, e Yuval Gefen. "Differences between statistical mechanics and thermodynamics on the mesoscopic scale". Physical Review B 56, n. 3 (15 luglio 1997): 1025–28. http://dx.doi.org/10.1103/physrevb.56.1025.

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Devincre, B., L. P. Kubin, C. Lemarchand e R. Madec. "Mesoscopic simulations of plastic deformation". Materials Science and Engineering: A 309-310 (luglio 2001): 211–19. http://dx.doi.org/10.1016/s0921-5093(00)01725-1.

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Xie, Zhi Hong, Pei Yan Huang, Gen Quan Zhong e Jun Deng. "Analysis of Mesoscopic Interfacial Mechanics of RC Beams Strengthened with FRP". Advanced Materials Research 97-101 (marzo 2010): 1713–17. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.1713.

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Concrete is assumed as a three-phase composite material composed by aggregate, mortar matrix and the bond layer between them in mesoscopic. The damage constitutive relationships of the composed materials are determined. A local meso-model of reinforced concrete (RC) beams strengthened with hybrid FRP was established to investigate the crack propagation and failure modes. The results show that the deformation, damage and failure of the concrete occurred near the ends of the interface.

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Sejnoha, J., M. Sejnoha, J. Zeman, J. Sykora e J. Vorel. "Mesoscopic study on historic masonry". Structural Engineering and Mechanics 30, n. 1 (10 settembre 2008): 99–117. http://dx.doi.org/10.12989/sem.2008.30.1.099.

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42

Qin, Lu, He, Qi, Li e Hu. "Effect of Silane Treatment on Mechanical Properties of Polyurethane/Mesoscopic Fly Ash Composites". Polymers 11, n. 4 (24 aprile 2019): 741. http://dx.doi.org/10.3390/polym11040741.

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Abstract (sommario):

In view of the accidents such as rock mass breakage, roof fall and coal slide in coal mines, polyurethane/mesoscopic fly ash (PU/MFA) reinforcement materials were produced from polymethylene polyphenylene isocyanate (PAPI), the polyether polyol, flame retardant, and MFA using stannous octanate as a catalyst. 3-Glycidoxypropyltrimethoxysilane (GPTMS) was grafted on MFA surface, aiming to improve the mechanical properties of PU/MFA composites. The analyses of infrared spectroscopy and compression resistance reveal that the GPTMS can be successfully attached to the surface of MFA, and the optimum modification dosage of GPTMS to MFA is 2.5 wt % (weight percent). On this basis, the effect of GPTMS on the mechanical properties of PU/MFA reinforcement materials during the curing process was systematically investigated through a compression test, a fracture toughness test, a three-point bending test, a bond property test, and a dynamic mechanics analysis. The results show that the compression property, fracture toughness, maximum flexural strength, and bond strength of PU/MFA composites increase by 21.6%, 10.1%, 8.8%, and 19.3%, respectively, compared with the values before the modification. Furthermore, the analyses of scanning electron microscope and dynamic mechanics suggest that the coupling agent GPTMS can successfully improve the mechanical properties of PU/MFA composites because it eliminates the stress concentration and exerts a positive effect on the crosslink density and hardness of PU/MFA composites.

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43

Frenkel, D. "Simulating mesoscopic order". Computational Materials Science 2, n. 1 (gennaio 1994): 127–30. http://dx.doi.org/10.1016/0927-0256(94)90054-x.

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44

Wang, Shu Hong, Yong Bin Zhang, Chun An Tang e Lian Chong Li. "Numerical Study on Cracking Process of Masonry Structure". Advanced Materials Research 9 (settembre 2005): 117–26. http://dx.doi.org/10.4028/www.scientific.net/amr.9.117.

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Abstract (sommario):

Masonry structure is heterogeneous and has been widely used in building and construction engineering. The study on cracking pattern of masonry structure is significant to engineering design. Many previous investigations on the failure process of masonry structure are usually based on the homogenization technique by selecting a typical unit of masonry to serve as a representative volume. This kind of numerical analysis neglects the mesoscopic heterogeneous structure, which cannot capture the full cracking process of masonry structures. The cracking process of masonry structure is dominantly affected by its heterogeneous internal structures. In this paper, a mesoscopic mechanical model of masonry material is developed to simulate the behavior of masonry structure. Considering the heterogeneity of masonry material, based on the damage mechanics and elastic-brittle theory, the new developed Material Failure Process Analysis (MFPA2D) system was put forward to simulate the cracking process of masonry structure, which was considered as a two-phase composite of block and mortar phases. The crack propagation processes simulated with this model shows good agreement with those of experimental observations. The numerical results show that numerical analysis clearly reflect the modification, transference and their interaction of the stress field and damage evolution process which are difficult to achieve by physical experiments. It provides a new method to research the forecast theory of failure and seismicity of masonry. It has been found that the fracture of masonry observed at the macroscopic level is predominantly caused by tensile damage at the mesoscopic level.

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Luo, Professor Li-Shi, Professor Manfred Krafczyk e Dr Yang Liu. "Mesoscopic methods in engineering and science". International Journal of Computational Fluid Dynamics 20, n. 6 (luglio 2006): 359–60. http://dx.doi.org/10.1080/10618560601051697.

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46

Xie, Ming, e Shan Suo Zheng. "Elastic-Plastic Fractal Damage Constitutive Law for Concrete". Advanced Materials Research 382 (novembre 2011): 348–51. http://dx.doi.org/10.4028/www.scientific.net/amr.382.348.

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In consideration of stochastik and discreteness of fracture surface, a class of mesoscopic damage mechanics model of concrete based on spring model, are put forward to understand the real damage evolution characteristics of concrete at the level of constitutional law. A kind of spring-slipper model is introduced to reflect the elastic-plastic damage behavior. Uniaxial test was operated, combined with the Computerized Tomography test of concrete, to study the evolution of crack surface from mesoscopic level to macroscopic level. And the rationality of fractal damage constitutive law was verified with their theoretical calculation result and test results. Compared with the existing damage constitutive law and experimental results preliminarily, the feasibility of fractal damage constitutive law is verified.

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De Proft, Kurt, Koen Heyens e Bert Sluys. "Mesoscopic modelling of masonry failure". Proceedings of the Institution of Civil Engineers - Engineering and Computational Mechanics 164, n. 1 (marzo 2011): 41–46. http://dx.doi.org/10.1680/eacm.9.00013.

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48

Hsu, J. P. "Fuzzy Transitions from Quantum to Classical Mechanics and New Phenomena of Mesoscopic Objects". Zeitschrift für Naturforschung A 52, n. 1-2 (1 febbraio 1997): 25–30. http://dx.doi.org/10.1515/zna-1997-1-209.

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Abstract A new "phase invariant" equation of motion for both microscopic and macroscopic objects is proposed. It reduces to the probabilistic wave equation for small masses and the deterministic classical equation for large masses. The motions of mesoscopic objects and fuzzy transitions between quantum and classical mechanics are discussed on the basis of the generalized equation. Experimental tests of new predictions are discussed.

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Härtel, Frank, Patrick Böhler e Peter Middendorf. "An Integral Mesoscopic Material Characterization Approach". Key Engineering Materials 611-612 (maggio 2014): 280–91. http://dx.doi.org/10.4028/www.scientific.net/kem.611-612.280.

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In several fields of engineering the automation of the CFRP production chain is a major issue. In this production chain the forming plays a key role, as the result of the forming influences everything in the chain from the infusion step until the part mechanics. To understand the influence of the material choice onto the forming process is a task followed by many scientists during the last 20 years. Basic tests for shear characterization like Picture Frame Test (PFT) and Bias Extension Test (BiasExt) were developed and used widely. This work deals with the comparison of the BiasExt to a fiber extraction test. The fiber extraction test is developed and used for the characterization of a woven and two non-crimp fabric material. The results are important for the process information and the judgment of primary deformation mechanisms. The tests are simulated for the unidirectional material in a mesoscopic approach and the results are compared in order to judge the capability of the mesoscopic simulation and its residual limitations.

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Fan, Hong-Yi, e Ze Wu. "Classical correspondence of quantum entanglement in mesoscopic circuit". Acta Physica Sinica 71, n. 1 (2022): 010302. http://dx.doi.org/10.7498/aps.71.20210992.

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Since the birth of quantum mechanics, its classical correspondence (or analogy) has been a hot topic for physicists. In this paper, we first discuss whether there is a classical correspondence of quantum entanglement. We give a positive answer through the following examples: in the framework of quantization of mesoscopic circuits, two mesoscopic capacitance inductance (LC) circuits with mutual inductance are proved to be the source of quantum entanglement by using the integration within an ordered product, and then the formula of their characteristic frequency is obtained, It is found that it is similar to the expression of the small oscillating frequency of a classical system described below. The classical system is shown in <xref ref-type="fig" rid="Figure1">Fig. 1</xref>. Two walls are connected with the same spring. And between the two springs a sliding trolley can move on a smooth table. The trolley is hung with a simple pendulum, The small oscillating frequency of the system is calculated by analytical mechanics. It is found that the swing of the simple pendulum will cause the trolley to oscillate back and forth. The mutual restraint effect of the pendulum, the trolley and the spring reflects the “entanglement” between them.

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