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Journal articles on the topic 'Macroscopic size effect'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Alonso, Lucas, Guilherme C. Matos, François Impens, Paulo A. Maia Neto, and Reinaldo de Melo e Souza. "Multipole Approach to the Dynamical Casimir Effect with Finite-Size Scatterers." Entropy 26, no. 3 (2024): 251. http://dx.doi.org/10.3390/e26030251.

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A mirror subjected to a fast mechanical oscillation emits photons out of the quantum vacuum—a phenomenon known as the dynamical Casimir effect (DCE). The mirror is usually treated as an infinite metallic surface. Here, we show that, in realistic experimental conditions (mirror size and oscillation frequency), this assumption is inadequate and drastically overestimates the DCE radiation. Taking the opposite limit, we use instead the dipolar approximation to obtain a simpler and more realistic treatment of DCE for macroscopic bodies. Our approach is inspired by a microscopic theory of DCE, which

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2

Satou, Fumihito, Hisao Esaka, and Kei Shinozuka. "Effect of Size and Morphology of Equiaxed Grains on Macroscopic Segregation." Tetsu-to-Hagane 99, no. 2 (2013): 108–16. http://dx.doi.org/10.2355/tetsutohagane.99.108.

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3

Sawada, Akikatsu, Tsutomu Azumi, Teruki Ono, Shinobu Aoyagi, and Yoshihiro Kuroiwa. "Slow Phase Transition and Macroscopic Size-Effect in CsZnPO 4 Crystal." Ferroelectrics 291, no. 1 (2003): 3–10. http://dx.doi.org/10.1080/00150190390222484.

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4

Myrzak, V. A. "Size Effect of the Rate of Deposition of Со-W Coatings from a Citrate Electrolyte". Elektronnaya Obrabotka Materialov 58, № 6 (2022): 37–41. http://dx.doi.org/10.52577/eom.2022.58.6.37.

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It is shown that during the electrodeposition of Co-W coatings from a citrate electrolyte two types of size effects of the process rate (dependence of the electrodeposition rate on the surface dimensions) can be observed: a microeffect due to the influence of microelectrode sizes on the diffusion current density and a macroscopic size effect associated with the structure of the cobalt complex.

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KAWANO, Y., and T. OKAMOTO. "MACROSCOPIC SIZE EFFECT OF INTER-LANDAU-LEVEL SCATTERING IN QUANTUM HALL SYSTEMS." International Journal of Modern Physics B 18, no. 27n29 (2004): 3789–96. http://dx.doi.org/10.1142/s0217979204027463.

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We present the experimental demonstration of a remarkable size effect of inter-Landau-level scattering (ILLS) in a quantum Hall bar. This observation has become possible by imaging cyclotron emission. The images obtained clearly reveal that spatial distribution of ILLS macroscopically depends on channel width of the device.

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AMIRJANOV, ADIL. "MODELLING THE DYNAMICS OF AN ADJUSTMENT OF A SEARCH SPACE SIZE IN A GENETIC ALGORITHM." International Journal of Modern Physics C 19, no. 07 (2008): 1047–62. http://dx.doi.org/10.1142/s0129183108012716.

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One way to improve a search strategy in a Genetic Algorithm (GA) is to reduce the search space towards the feasible region where the global optimum is located. The paper describes the effect of an adjustment of a search space size of GA on the macroscopic statistical properties of population such as the average fitness and the variance fitness of population. The set of equations of motion was derived for the one-max problem that expressed the macroscopic statistical properties of population after an adjustment of a search space size in terms of those prior to the operation.

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AMIRJANOV, ADIL. "THE PERFORMANCE OF GENETIC ALGORITHM WITH ADJUSTMENT OF A SEARCH SPACE." International Journal of Modern Physics C 20, no. 04 (2009): 565–83. http://dx.doi.org/10.1142/s0129183109013807.

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This paper investigates the effect of a linear adjustment of a search space size in genetic algorithm (GA) on the macroscopic statistical properties of population (such as the average fitness and the variance fitness of population). The equations of motion were derived for one-max problem that expressed the macroscopic statistical properties of population after the adjustment of a search space size. Analysis of a performance of GA that includes a computational cost and a quality of the optimal solution was made for linear and power laws of search space adjustment.

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8

López-Incera, Andrea, Pavel Sekatski, and Wolfgang Dür. "All macroscopic quantum states are fragile and hard to prepare." Quantum 3 (January 25, 2019): 118. http://dx.doi.org/10.22331/q-2019-01-25-118.

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We study the effect of local decoherence on arbitrary quantum states. Adapting techniques developed in quantum metrology, we show that the action of generic local noise processes --though arbitrarily small-- always yields a state whose Quantum Fisher Information (QFI) with respect to local observables is linear in system size N, independent of the initial state. This implies that all macroscopic quantum states, which are characterized by a QFI that is quadratic in N, are fragile under decoherence, and cannot be maintained if the system is not perfectly isolated. We also provide analytical boun

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9

Bolton, C. D., and J. A. D. Wattis. "Size-Templating Matrix Effect in Vesicle Formation. 2. Analysis of a Macroscopic Model." Journal of Physical Chemistry B 107, no. 51 (2003): 14306–18. http://dx.doi.org/10.1021/jp034590+.

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10

Nowak, Krzysztof. "Time to Failure Size Effect for Tensile Creep Specimens." Key Engineering Materials 627 (September 2014): 185–88. http://dx.doi.org/10.4028/www.scientific.net/kem.627.185.

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Size effect for tension specimen in creep condition is not very well recognised phenomenon. The Weibull’s works on influence of nonhomogeneity of material properties on its strength suggest that such effect should take place also for creep. The most of authors regard that the stress redistribution occurring during creep considerably reduces size effect. To examine it the author performed a series of experiments for thin tin alloy wires creeping in room temperature as well as some numerical simulations. The results confirmed the existence of size effect for time to failure. The numerical analys

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11

Zhou, Jian Guo. "Macroscopic Lattice Boltzmann Method." Water 13, no. 1 (2020): 61. http://dx.doi.org/10.3390/w13010061.

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The lattice Boltzmann method (LBM) is a highly simplified model for fluid flows using a few limited fictitious particles. It has been developed into a very efficient and flexible alternative numerical method in computational physics, demonstrating its great power and potential for resolving more and more challenging physical problems in science and engineering covering a wide range of disciplines such as physics, chemistry, biology, material science and image analysis. The LBM is implemented through the two routine steps of streaming and collision using the three parameters of the lattice size

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12

Ma, Chang Bing, and Hong Fu Qiang. "The Effect of Interface Damage on Macroscopic Constitutive Behavior of Composite Materials." Advanced Materials Research 217-218 (March 2011): 1001–5. http://dx.doi.org/10.4028/www.scientific.net/amr.217-218.1001.

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Base on the finite element method, the effect of interface damage on macroscopic constitutive behavior of composite materials subjected to uniaxial tension was studied. A bilinear cohesive law, which relates the traction and displacement jumps, was adopted to model the debonding of particle/matrix interface. Stress-strain curves for a material with different interface properties, particle size and volume fraction were discussed in detail. The results show that the damage due to debonding of particle/matrix interfaces can significantly affect the macroscopic response of composite materials, and

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13

Allameh-Haery, Haleh, Christopher M. Wensrich, Thomas Fiedler, and Erich Kisi. "Novel cellular perlite-epoxy foams: Effects of particle size." Journal of Cellular Plastics 53, no. 6 (2016): 597–622. http://dx.doi.org/10.1177/0021955x16670528.

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The micro-structure and mechanical properties of lightweight porous foams synthesized by dispersing expanded perlite particles (expanded siliceous volcanic glass) in a matrix of epoxy resin were examined. Foams were fabricated with three distinct particle size ranges and, within each size, samples covered a density range of 0.15–0.45 g/cm3. The effects of particle size variation on compressive strength, effective elastic modulus, and modulus of toughness were investigated. An upper and a lower bound were estimated for the elastic modulus of particles in EP/epoxy foams. EP/epoxy foams showed Re

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14

Wei, J. N., X. B. Chao, T. C. Huang, L. S. Yu, J. S. Zou, and W. J. Xie. "Effects of Macroscopic Pores on the Damping Behavior of Zn-Al Eutectoid Alloy." Applied Mechanics and Materials 182-183 (June 2012): 213–16. http://dx.doi.org/10.4028/www.scientific.net/amm.182-183.213.

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The objective of present work is to investigate the effect of macroscopic pores on the damping behavior of Zn-Al eutectoid alloy. The damping behavior of the foamed Zn-Al (FZA) eutectoid alloy prepared by air pressure infiltration process with macroscopic pores is characterized by internal friction (IF). Macroscopic pores size are on the order of a millimetre (0.51.0mm). The IF was measured on a multifunction internal friction apparatus (MFIFA) at frequencies of 0.5, 1.0 and 3.0 Hz over the temperature range of 25 to 400°C, while continuously heating temperature. The damping capacity of the F

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15

Fu, Yu, and Zhongliang Feng. "Simulation of the Effect of Coal Microstructures on the Macroscopic Mechanical Behavior." Advances in Civil Engineering 2020 (November 26, 2020): 1–14. http://dx.doi.org/10.1155/2020/1025952.

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This paper investigates the influence of mineral structure on macromechanical behavior of coal under different loading conditions using X-ray CT scanning experimental and numerical methods. The three-dimensional (3D) reconstruction of coal was conducted to assess the spatial distribution characteristics of the mineral structure by AVIZO software. Based on fractal box dimension (BCD) and equivalent diameter, the mineral structures were quantitatively characterized. The 3D finite element models with three distribution characteristics of minerals were built, and the model was considered as a rand

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16

Penfornis, Corentin, Abdeljalil Jourani, and Pierre-Emmanuel Mazeran. "Effect of Grain Sizes on the Friction and Wear Behavior of Dual-Phase Microstructures with Similar Macrohardness and Composition." Coatings 13, no. 3 (2023): 533. http://dx.doi.org/10.3390/coatings13030533.

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The tribological behavior of dual-phase steels have been studied at the macroscopic scale taking the macrohardness as the main material property to control friction and wear. However, the contribution to the macroscopic behavior of the varying properties of the phase at the microscopic scale are yet to be fully understood. In this study, dual-phase microstructures with various grain sizes and martensite volume fraction are generated. Microhardness of ferrite and martensite are measured by nanoindentation tests while their friction and wear behavior are studied by conducting scratch tests with

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17

Meshcheryakov, Yu I., A. K. Divakov, N. I. Zhigacheva, and M. M. Myshlyaev. "Effect of the grain size on the macroscopic response of aluminum to shock loading." Journal of Applied Mechanics and Technical Physics 48, no. 6 (2007): 887–96. http://dx.doi.org/10.1007/s10808-007-0113-9.

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18

Uchida, Makoto, and Naoya Tada. "Computational Simulation of Micro- to Macroscopic Deformation Behavior of Cavitated Rubber Blended Amorphous Polymer Using Second-Order Homogenization Method." Key Engineering Materials 626 (August 2014): 74–80. http://dx.doi.org/10.4028/www.scientific.net/kem.626.74.

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To evaluate the effect of the size of the microstructure on the mechanical property of the cavitated rubber blended (voided) amorphous polymer, the FEM simulation based on the rate form second-order homogenization method, in which rates of the macroscopic strain and strain gradient are given to the microstructure, was performed. Computational simulations of micro-to macroscopic deformation behaviors of amorphous polymers including different sizes and volume fractions of the voids were performed. Non-affine molecular chain network theory was employed to represent the inelastic deformation behav

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19

Vieira, Rosemary, Humberto Marotta, Kátia Kellem da Rosa, et al. "Análisis Sedimentológico y geomorfológico de áreas lacustres en la Península Fildes, Isla Rey Jorge, Antártica Marítima." Investigaciones Geográficas, no. 49 (July 29, 2015): 3. http://dx.doi.org/10.5354/0719-5370.2015.37511.

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Geomorphological features and sedimentary characteristics are analized from five sets of shallow sediment cores collected in lakes in the Fildes Peninsula, King George Island. The geomorphology of the area was observed and sediments samples were obtained at field activities during the XXXI Brazilian Antarctic Operation (March-April/2013). Biogeochemical characteristics, physical parameters, mineralogical composition, particle size distribution, macroscopic characteristics of the sediments and satellite images were analized. Preliminary results indicate climatic and environmental changes in nor

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20

Wang, Shuang, Xin Jia, Ming Cheng, Hongyuan Li, Chuanbin Yu, and Haibing Yang. "Macroscopic Mechanical Properties of Periodic Nanocomposites Containing Arbitrarily-Shaped Inclusions." Symmetry 17, no. 1 (2024): 39. https://doi.org/10.3390/sym17010039.

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This study presents an in-depth analysis of the macroscopic mechanical properties of periodic nanocomposites containing arbitrarily-shaped inclusions, with a particular focus on the effective stiffness and its dependence on microstructural parameters. We employ a complex variable method to address the problem, considering the interface elasticity effect, which may significantly influence the stress distribution and overall stiffness of the nanocomposites. The research reveals that the effective stiffness of the nanocomposites is not only dependent on the volume fraction and shape of the inclus

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21

Zhong, Lijia, Fengyin Liu, Zhonghua Wu, Naifei Liu, Hao Li, and Bo Wang. "Size Effect on the Strength Behavior of Cohesionless Soil Under Triaxial Stress State." Applied Sciences 15, no. 6 (2025): 3310. https://doi.org/10.3390/app15063310.

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Many underground projects are built in cohesionless soil regions, where soil strength is crucial for stability. Particle size greatly influences the mechanical behavior of cohesionless soil. To investigate the relationship between particle size (as a single internal variable) and the strength behavior of cohesionless soil, this study employed idealized spherical glass beads of varying sizes as an experimental material. A series of consolidated-drained triaxial compression tests, including both conventional and large-scale tests, were conducted on specimens with different particle sizes. The co

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22

Chunchu, Mallikarjuna, and Bhavathrathan Bhattiyil Kuzhiyamkunnath. "ANALYSIS OF THE EFFECT OF TWO-WHEELER LANE-SHARING BEHAVIOR ON MACROSCOPIC TRAFFIC FLOW MODELING." TRANSPORT 29, no. 2 (2014): 146–53. http://dx.doi.org/10.3846/16484142.2014.928788.

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Small size motorized vehicles such as the motorized two-wheelers are predominantly present in the traffic observed in the developing countries. Presence of these smaller vehicles invalidates the concept of lane discipline commonly observed in the homogeneous traffic streams. In this paper an attempt has been made to understand the Motorized Two-Wheeler (MTW) lane-sharing behavior and its effects on traffic flow modeling. The objectives of this attempt are to analyze the lane-sharing behavior of MTWs at microscopic and macroscopic level, and to propose a methodology to incorporate this behavior

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23

Lyu, Hao, Yaxin Zhang, Yuan Bao, and Jiahui Zhang. "The Effect of Initial Texture on the Plastic Deformation of Gradient Aluminum." Materials 16, no. 7 (2023): 2603. http://dx.doi.org/10.3390/ma16072603.

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The effect of specific processing-induced surface textures in gradient aluminum has not yet been investigated. A dislocation-based multi-scale framework is employed to explore the influence of various initial shearing textures and the depth from the surface of the region featuring each texture on the macroscopic behavior of gradient aluminum. By assigning different textures to the same grain size gradient aluminum sample, the initial texture was found to significantly affect the plastic deformation and macroscopic behavior of gradient aluminum. Specifically, the {111} texture can enhance the s

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QIN, G. "EXCITON-LO PHONON INTERACTION IN GaAs QUANTUM DOTS." International Journal of Modern Physics B 19, no. 15n17 (2005): 2823–28. http://dx.doi.org/10.1142/s0217979205031766.

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All the previous contributions on electron-LO phonon interaction in quantum dot structures are based on macroscopic isotropic models. The macroscopic dielectric model taking account of the phonon confinement points out that the interaction strength between electron-hole pair and LO phonon (eh-ph) in semiconductor quantum dots is size-independent that is not in accord with some of the experiment data. In this article, after taking account of the effect of transverse charges of ions, microscopic valence force field model based on group theory is used to evaluate the eh-ph and exciton-LO phonon (

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25

Sena, Elisa T., Allison McComiskey, and Graham Feingold. "A long-term study of aerosol–cloud interactions and their radiative effect at the Southern Great Plains using ground-based measurements." Atmospheric Chemistry and Physics 16, no. 17 (2016): 11301–18. http://dx.doi.org/10.5194/acp-16-11301-2016.

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Abstract. Empirical estimates of the microphysical response of cloud droplet size distribution to aerosol perturbations are commonly used to constrain aerosol–cloud interactions in climate models. Instead of empirical microphysical estimates, here macroscopic variables are analyzed to address the influence of aerosol particles and meteorological descriptors on instantaneous cloud albedo and the radiative effect of shallow liquid water clouds. Long-term ground-based measurements from the Atmospheric Radiation Measurement (ARM) program over the Southern Great Plains are used. A broad statistical

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Wang, Xinlin, Jinkun Jiang, Chengui Xia, and Yang Yu. "Macroscopic and Microstructural Features of Metal Thin-Wall Fabricated by Laser Material Deposition: A Review." Coatings 12, no. 8 (2022): 1104. http://dx.doi.org/10.3390/coatings12081104.

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Owing to the versatility without expanding the machine’s size, thin-wall has been widely used in high-value parts. The investigation of laser additive manufacturing (LAM), which has advantages such as high powder density, easy controllability, and excellent stability, on the fabrication of thin-wall has drawn much attention. In this paper, the research status of macroscopic and microstructural features of metal thin-wall fabricated by LAM has been reviewed. The deposition quality was mainly focused on the effect of process parameters and especially the matching of z-increment and single deposi

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27

Winardhi, Chandra Widyananda, Jose Ricardo da Assuncao Godinho, and Jens Gutzmer. "The Effect of Macroscopic Particle Features on Mineral Dissolution." Minerals 13, no. 2 (2023): 253. http://dx.doi.org/10.3390/min13020253.

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Mineral dissolution is a dynamic process in which kinetics depend on the reactive surface area, orientation, and geometry of the dissolving mineral grain. Dissolution rate is, thus, not represented by a single value, but rather, by a spectrum that is affected by the reactivity of different types of surface features. Such dissolution rate spectra are usually obtained by very detailed studies of perfectly cleaved surfaces by atomic force microscopy or in situ studies, such as flow-through experiments. This study visualizes dissolution progress by repeated X-ray computed tomography scans of a sin

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Myrzak, V., A.V. Gotelyak, and A.I. Dikusara. "On the Size Effects of the Coatings Surfaces Properties Obtained at Electrodeposition of Alloys of Iron Group Metals With Tungsten." Электронная обработка материалов 6, no. 56 (2020): 1–11. https://doi.org/10.5281/zenodo.4299831.

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The reasons for the appearance of dimensional properties of surfaces of coatings obtained under the conditions of induced codeposition of iron group metals with tungsten are investigated. It is shown that the previously described size effect of microhardness and the macroscopic size effect of the corrosion rate discovered and described in this article have the same nature – the formation of surface oxides. Deletion of oxides by abrasive treatment results in an increased corrosion rate and a lack of the size effect of microhardness. The reasons for the formation of oxides surface layers d

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29

He, Bob B. "XRD² Stress Measurement for Samples with Texture and Large Grains." Materials Science Forum 768-769 (September 2013): 227–34. http://dx.doi.org/10.4028/www.scientific.net/msf.768-769.227.

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Stress measurement on samples with texture and large grains is always a challenge. The diffraction peak intensity varies dramatically with different sample orientation. The macroscopic elasticity becomes anisotropic due to strong preferred orientation. The large grains may results in a big error in 2θ due to poor sampling statistics. The fitting results of the conventional sin2ψ method is extremely sensitive to texture and large grains. When stress is measured with a 2D detector, most of the above adverse effects can be minimized or eliminated. The data integration helps to smooth out rough di

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Pham, Son Tung, and William Prince. "Self-Healing Effect Caused by Accelerated Carbonation of Thermally Damaged Cement Mortar: Changes in Microstructural and Macroscopic Properties." Applied Mechanics and Materials 529 (June 2014): 36–40. http://dx.doi.org/10.4028/www.scientific.net/amm.529.36.

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The objective of this work was to examine the influence of accelerated carbonation on the microstructural and macroscopic properties of thermally damage cement mortar. A normalised CEM II mortar was treated at 500°C then submitted to carbonation at 20°C, 65% relative humidity and 20% of CO2 concentration. The pores size distributions were determined from nitrogen adsorption. We also followed changes in electrical resistivity and ultrasonic velocity. The results showed that losses of macroscopic properties caused by cracks appeared at high temperature were restored due to carbonation. This high

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Morita, Shigeki, Nobuyoshi Ohno, Fujio Tamai, and Yuji Kawakami. "Effect of Grain Size on Fatigue Crack Propagation in Extruded AZ31 Magnesium Alloys." Materials Science Forum 706-709 (January 2012): 1233–36. http://dx.doi.org/10.4028/www.scientific.net/msf.706-709.1233.

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This paper describes the fatigue crack propagation behavior of extruded AZ31B magnesium alloys (average grain size: approximately 15 and 119 μm, respectively). Fatigue crack propagation tests were performed on center cracked tension (CCT) specimens at a stress ratio ofR=0.1 and a frequency of 10 Hz at room temperature. Loading axis was parallel to the extrusion direction; crack face was perpendicular to basal plane of each grain. The crack growth rate (da/dN) of the coarse-grained specimen was approximately 5 times higher than that of the fine-grained specimen. Fracture surfaces of the fine-gr

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Yue, Ming, Bingbing Li, Qiang Chen, Jidong Gao, Weiyao Zhu, and Zhiyong Song. "Experimental Investigation on the Effect of Pore Size on Spontaneous Imbibition Recovery in Oil-Wet Reservoirs." Geofluids 2022 (January 19, 2022): 1–8. http://dx.doi.org/10.1155/2022/4319832.

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Spontaneous imbibition has been considered as a significant method to enhanced oil recovery (EOR) in unconventional reservoirs. The main impediment to comprehending the variation characteristics of spontaneous imbibition at different pore scales was the reservoir’s opacity. To this end, a series of spontaneous imbibition experiments of visualized oil-wet microtubes with six different diameters (10 μm~60 μm) were performed, as were the corresponding macroscopic core imbibition tests with six different permeabilities under the same conditions. The results showed that formation brine mostly advan

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Uchida, Makoto, Keita Suzuki, and Yoshihisa Kaneko. "Computational Simulation of Scale-Dependent Non-Uniform Deformation Behavior of Polymer Foam." Key Engineering Materials 725 (December 2016): 456–61. http://dx.doi.org/10.4028/www.scientific.net/kem.725.456.

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Polymer foam is widely used in the engineering field because of various functions such as lightweight, shock absorbing, insulation and so on. However, the strength of the material dramatically decreases with the increase in the volume fraction of the foam. Furthermore, deformation behavior of the material strongly depends on the microscopic heterogeneous structure consisting of foam and polymer wall. In the present study, a micro-to macroscopic deformation behavior of polymer foam is modeled using the rate-form second-order homogenization method. To model the microscopic structure consisting o

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Butlanska, Joanna, Marcos Arroyo, and Antonio Gens. "Steady state of solid-grain interfaces during simulated CPT." Studia Geotechnica et Mechanica 35, no. 4 (2013): 13–22. http://dx.doi.org/10.2478/sgem-2013-0034.

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Abstract It has recently been shown (Arroyo et al. [1]) that 3D DEM models are able to reproduce with reasonable accuracy the macroscopic response of CPT performed in calibration chambers filled with sand. However, the cost of each simulation is an important factor. Hence, to achieve manageable simulation times the discrete material representing the sand was scaled up to sizes that were more typical of gravel than sand. A side effect of the scaled-up discrete material size employed in the model was an increased fluctuation of the macro-response that can be filtered away to observe a macroscopi

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Deng, Qingming, Nadeem Bhatti, Xiaochun Yin, and Magd Abdel Wahab. "Numerical Modeling of the Effect of Randomly Distributed Inclusions on Fretting Fatigue-Induced Stress in Metals." Metals 8, no. 10 (2018): 836. http://dx.doi.org/10.3390/met8100836.

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The analysis of fretting fatigue plays an important role in many engineering fields. The presence of heterogeneity may affect the performance of a machine or a structure, including its lifetime and stability. In this paper, the effect of randomly distributed micro inclusions on the fretting fatigue behaviour of heterogeneous materials is analysed using the finite element method (FEM) for different sizes, shape and properties of inclusions. The effect of micro inclusions on macroscopic material properties is also considered by representative volume element (RVE). It is shown that the influence

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Wang, Bao Lai, Zhen Qing Wang, Guo Dong Fang, Jun Liang, and Li Min Zhou. "Research on Tensile Properties and Size Effect of 3D Four-Directional Braided Composites." Advanced Materials Research 183-185 (January 2011): 2183–86. http://dx.doi.org/10.4028/www.scientific.net/amr.183-185.2183.

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By the macroscopic tensile tests of the 3D four-directional braided composites, the failure pattern and fracture morphology of specimens with different geometric sizes have been observed. It is obtained that the different failure mechanisms and the material properties are relevant to the geometric sizes of samples under tensile states. The elastic properties of the braided composites are obtained by volume average method. The variation of shear modulus and Poisson ratio is obtained as well. It is shown that the elastic modulus increases with the increase of number of interior cells. The predic

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Sahu, Jambeswar, Shanta Chakrabarty, Rajesh Raghavan, and Sushil Mishra. "Investigations of size effect on formability and microstructure evolution in SS304 thin foils." Journal of Strain Analysis for Engineering Design 53, no. 7 (2018): 517–28. http://dx.doi.org/10.1177/0309324718792443.

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In the micro-forming process when the thickness of the sheet material is comparable to the intrinsic length scales of that material, deformation behaviour differs from that which is expected in the macroscopic sheet material. In this study, size effects of SS304 foils have been investigated using tensile and limiting dome height tests along with careful microstructural investigations. SS304 foils of differing thicknesses but similar grain size have been deformed under varying strain path conditions to capture the impact of foil thickness on the mechanical response and microstructure evolution.

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Hou, Ji-Dan, Yun-Ping Zhang, and Chun-Ju Tang. "New polymer nano-biomaterials in rehabilitation nursing of orthopedic surgery injuries." Materials Express 12, no. 1 (2022): 173–77. http://dx.doi.org/10.1166/mex.2022.2130.

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Changes in nano-bio materials’ surface electronic structure and crystal structure produce small-size effects that macroscopic objects do not have. This makes it have a series of excellent macroscopic properties such as force, magnetism, electricity, optics, chemistry, and biology that traditional materials do not have. This article studies the application of new polymer nano-bio materials in orthopedic trauma. We study the effect of nanolevel hydroxyapatite gradient coating on the expression of osteoblast phenotypic factors. The shear strength of the implant-bone interface is better than the t

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39

Thurn, Jeremy, and Robert F. Cook. "Indentation-induced deformation at ultramicroscopic and macroscopic contacts." Journal of Materials Research 19, no. 1 (2004): 124–30. http://dx.doi.org/10.1557/jmr.2004.19.1.124.

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Depth-sensing indentation at ultramicroscopic and macroscopic contacts (“nanoindentation” and “macroindentation,” respectively) was performed on four brittle materials (soda-lime glass, alumina titanium carbide, sapphire, and silicon) and the resulting load–displacement traces examined to provide insight to the elastic and plastic deformation scaling with contact size. The load–displacement traces are examined in terms of the unloading stiffness, the energies deposited during loading and recovered on unloading, and the effect of the indenter tip radius on the loading curve. The results of the

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Bezymyannykh, D. G., N. G. Pugach, E. A. Sedov, K. Yu Arutyunov, E. G. Ekomasov, and B. G. Lvov. "QUANTUM SIZE EFFECT IN CLEAN ALUMINUM FILMS." Izvestia Ufimskogo Nauchnogo Tsentra RAN, no. 1 (March 12, 2024): 55–60. http://dx.doi.org/10.31040/2222-8349-2024-0-1-55-60.

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In the modern world, there's a notable trend towards the active miniaturization of electronic devices. With technological advances enabling the manipulation of nanostructures, there's an increasing focus on exploring quantum effects pivotal to such designs. One distinguishing feature of nanostructures is the quantum nature of the electron's energy spectrum. This spectrum becomes discrete in directions where electrons move. Depending on the direction of this confinement, structures can be categorized as nanoplates, quantum wires, or quantum dots. The properties of such structures can significan

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Miura, Sei, Yoshito Nishimura, and Nagato Ono. "Sub-Grain Size and Hall-Petch Relation in Pure Copper Single Crystals." Key Engineering Materials 345-346 (August 2007): 29–32. http://dx.doi.org/10.4028/www.scientific.net/kem.345-346.29.

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The effect of sub-grain on the yield stress of pure copper single crystals with the [253] orientation was investigated by using the etch pit technique. The single crystal plates were successfully prepared from the seed crystals, which were produced at the melting temperature of 1473 K by the Bridgeman method. The present investigation confirmed the Hall-Petch relation concerning the effect of sub-grain boundaries on the macroscopic yielding of pure copper. The result derived from the extrapolation of the relationship of critical resolved shear stress (CRSS) and the initial dislocation density

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Mokios, George P., and Elias C. Aifantis. "A gradient elasticity approach to the indentation size effect at very small depths." Journal of the Mechanical Behaviour of Materials 20, no. 1-3 (2011): 35–40. http://dx.doi.org/10.1515/jmbm.2011.005.

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AbstractOver the past two decades, the indentation size effect (ISE) has been studied extensively by several authors. A common point among all these studies has been the premise that during the indentation process sufficient plastic deformation is developed so that a gradient plasticity framework can be employed in order to capture this effect. However, recent studies have shown that a more detailed analysis of the deformation mechanism during nanoindentation reveals often situations that vary significantly from commonly held beliefs, i.e., configurations where plastic deformation is almost ab

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Yin, Peng, Chunguang Xu, Qinxue Pan, Wenjun Zhang, and Xiaowei Jiang. "Effect of Different Ultrasonic Power on the Properties of RHA Steel Welded Joints." Materials 15, no. 3 (2022): 768. http://dx.doi.org/10.3390/ma15030768.

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Based on the changes of microhardness, tensile strength, and impact resistance caused by the difference of macroscopic morphology and microstructure of welded joints, this paper studied the effect of different ultrasonic power on the properties of welded joints during the welding of homogeneous armor steel. It is experimentally found that the macroscopic morphology of those joints is very different. Compared with conventional welding, ultrasonic welding can increase the weld depth and the width of the heat-affected zone (HAZ) on either side of the weld. However, only the ultrasonic wave at an

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Ji, Mo, Claire Davis, and Martin Strangwood. "Effect of Grain Size Distribution on Recrystallisation Kinetics in an Fe-30Ni Model Alloy." Metals 9, no. 3 (2019): 369. http://dx.doi.org/10.3390/met9030369.

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This paper discusses the role of grain size distribution on the recrystallisation rates and Avrami values for a Fe-30 wt. % Ni steel, which was used as a model alloy retaining an austenitic structure to room temperature. Cold deformation was used to provide uniform macroscopic strain distributions (strains of 0.2 and 0.3), followed by recrystallisation during annealing at 850–950 °C. It was shown that the Avrami parameter was directly related to the grain size distribution, with a lower Avrami exponent being seen for a larger average and wider grain size distribution. A method to predict the A

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Zima, Beata, and Rafał Kędra. "Numerical Study of Concrete Mesostructure Effect on Lamb Wave Propagation." Materials 13, no. 11 (2020): 2570. http://dx.doi.org/10.3390/ma13112570.

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The article presents the results of the numerical investigation of Lamb wave propagation in concrete plates while taking into account the complex concrete mesostructure. Several concrete models with randomly distributed aggregates were generated with the use of the Monte Carlo method. The influence of aggregate ratio and particle size on dispersion curves representing Lamb wave modes was analyzed. The results obtained for heterogeneous concrete models were compared with theoretical results for homogeneous concrete characterized by the averaged macroscopic material parameters. The analysis indi

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Dehua, Wang, Jiang Longlong, Yu Yang, et al. "Effect of grain size on macroscopic flexibility and luminescence intensity of inorganic (Ba,Ca)TiO3:Pr3+." Journal of Alloys and Compounds 912 (August 2022): 165163. http://dx.doi.org/10.1016/j.jallcom.2022.165163.

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Dehua, Wang, Jiang Longlong, Yu Yang, et al. "Effect of grain size on macroscopic flexibility and luminescence intensity of inorganic (Ba,Ca)TiO3:Pr3+." Journal of Alloys and Compounds 912 (August 2022): 165163. http://dx.doi.org/10.1016/j.jallcom.2022.165163.

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Ozden, Utku Ahmet, Geng Chen, Alexander Bezold, and Christoph Broeckmann. "Numerical Investigation on the Size Effect of a WC/Co 3D Representative Volume Element Based on the Homogenized Elasto-Plastic Response and Fracture Energy Dissipation." Key Engineering Materials 592-593 (November 2013): 153–56. http://dx.doi.org/10.4028/www.scientific.net/kem.592-593.153.

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Tungsten carbide-cobalt (WC/Co) is a two phase material composed of two distinct interpenetrating phases having different mechanical properties. The hard and brittle WC phase behaves elastically whereas the Co phase demonstrates an elasto-plastic response. In order to predict the global behavior of the material from its microscopic constitution, the representative volume element (RVE) model has to satisfy basic requirement of a certain size. Moreover the homogenized response of the RVE has to be characterized with respect to the macroscopic mechanical property of interest. Taking into consider

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Kumar, M. Arul, Sivasambu Mahesh, and P. Venkitanarayanan. "A Rate-Independent 'Stack' Model of a Polycrystalline Aggregate." Materials Science Forum 702-703 (December 2011): 192–95. http://dx.doi.org/10.4028/www.scientific.net/msf.702-703.192.

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The 'stack' model of a rate-independent rigid-plastic polycrystalline material is developed. In the 'stack' model, stacks of N neighboring sub-grain domains collectively accommodate the imposed macroscopic deformation while enforcing the velocity and traction continuity condition with its neighbors. The developed 'stack' model is applied to simulate the two-dimensional polycrystalline aggregate under macroscopically imposed plane-strain tension. The effect of inter- and intra-grain interactions on qualitative and quantitative variations in the predicted macroscopic stress-strain response and t

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Hao, Liangyuan, Jianliang Zhang, Huan Cheng, Luying Xiao, Fei Liao, and Wenjia Hu. "Study on the Influence of Industrial Coke Oven Size on the Quality of Metallurgical Coke." Processes 12, no. 8 (2024): 1637. http://dx.doi.org/10.3390/pr12081637.

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The large-scale coke oven is a developing trend in coking technology, and the influence of the industrial coke oven size on the quality of metallurgical coke needs to be revealed. Under the same raw coals and blending ratios, metallurgical cokes were obtained from top-loading coke ovens with carbonization chamber heights of 6 and 7 m, respectively. The macroscopic quality and microstructure of the refined metallurgical cokes were comprehensively tested. The results showed that the conventional cold and thermal strength indexes of Coke-7m were better than those of Coke-6m. The comprehensive the

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