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Journal articles on the topic 'Fractura bidimensional'

Author: Grafiati

Published: 5 June 2025

Last updated: 2 August 2025

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1

Hinojosa, Moisés, Jorge Aldaco, and Marco Castillo. "AUTOAFINIDAD DE LAS TRAYECTORIAS DE PROPAGACIÓN DE GRIETAS EN DOS TIPOS DE PAPEL." Rev. LatinAm. Metal. Mat. 37, no. 1 (2016): 35–44. https://doi.org/10.5281/zenodo.8217903.

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Está documentado que las superficies de fractura de materiales tridimensionales son objetos autoafines caracterizados por el exponente de Hurst, centrados en valores persistentes o universales de 0,5 y 0,8. La fractura de materiales bidimensionales ha sido menos estudiada y el medio más analizado ha sido el papel. Los modelos teóricos predicen en general valores del orden de 2/3 para el exponente de Hurst en dos dimensiones, sin embargo,los resultados experimentales reportados muestran una dispersión y desviaciones de dicho valor. Siendo el papel un material anisotr

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Escamilla-Casas, J. C., E. Meneses-Meneses, E. Ortiz-Hernández, E. M. Uribe-Alcántara, and E. Cruz-Chávez. "Interpretación en un espacio bidimensional de las fallas geológicas en la Sierra de Pachuca." Tópicos de Investigación en Ciencias de la Tierra y Materiales 4 (October 5, 2017): 85–91. http://dx.doi.org/10.29057/aactm.v4i4.9391.

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Una carta geológica es una representación gráfica de la distribución de unidades litológicas y estructuras geológicas en el terreno. Por lo tanto, geométricamente hablando, la extensión del mapa es un área que corresponde a un espacio bidimensional delimitado. Consecuentemente, mediante la geometría Euclidiana es posible determinar características como: la extensión del espacio bidimensional, las longitudes de los segmentos de rectas que definen la extensión de fallas geológicas y sus direcciones preferenciales; así como la intensidad, conectividad y densidad de las mismas. Estas característic

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Planas, Jaime. "A note on pseudo-cohesive behavior in quasi-bidimensional brittle fracture." Engineering Failure Analysis 16, no. 8 (2009): 2513–20. http://dx.doi.org/10.1016/j.engfailanal.2009.04.021.

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4

Dunia, I., S. Manenti, A. Rousselet, and E. L. Benedetti. "Electron microscopic observations of reconstituted proteoliposomes with the purified major intrinsic membrane protein of eye lens fibers." Journal of Cell Biology 105, no. 4 (1987): 1679–89. http://dx.doi.org/10.1083/jcb.105.4.1679.

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The purified major intrinsic protein of the lens fiber plasma membrane (MP26) reconstituted into liposomes favored membrane-to-membrane close contacts as visualized by freeze fracture and immunoelectron microscopy. Reconstituted apposed unilamellar vesicles formed pentalaminar profiles, and multilamellar liposomes showed regions of stacked bilayers. Immunogold labeling, using antibody directed against MP26, demonstrated that this polypeptide is present in regions of membrane-to-membrane close interaction. Fracture faces displayed both randomly distributed clusters of 8-nm polygonal intramembra

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Kriaa, Yosra, Yassine Hersi, Amine Ammar, and Bassem Zouari. "Quasi-Static and Dynamic Crack Propagation by Phase Field Modeling: Comparison with Previous Results and Experimental Validation." Applied Sciences 14, no. 10 (2024): 4000. http://dx.doi.org/10.3390/app14104000.

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In this paper, experimental tensile tests for pre-cracked high Carbon steel ‘C90’ specimens were performed for quasi-static and dynamic loading. High loading velocity affects the crack patterns by preventing deflection. On the other hand, an efficient numerical tool based on the phase field model was developed and validated to predict brittle fracture trajectories. A staggered numerical scheme was adopted to solve the displacement and damage fields separately. Implementation efficiency in initiating and propagating cracks, even from an undamaged microstructure, was proved. The effect of the cr

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Bergoli, CD, JBC Meira, LF Valandro, and MA Bottino. "Survival Rate, Load to Fracture, and Finite Element Analysis of Incisors and Canines Restored With Ceramic Veneers Having Varied Preparation Design." Operative Dentistry 39, no. 5 (2014): 530–40. http://dx.doi.org/10.2341/13-179.

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SUMMARY Purpose To evaluate the survival rate, success rate, load to fracture, and finite element analysis (FEA) of maxillary central incisors and canines restored using ceramic veneers and varying preparation designs. Methods and Materials Thirty human maxillary central incisors and 30 canines were allocated to the following four groups (n=15) based on the preparation design and type of tooth: Gr1 = central incisor with a conservative preparation; Gr2 = central incisor with a conventional preparation with palatal chamfer; Gr3 = canine with a conservative preparation; Gr4 = canine with a conve

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de Sousa, J. M., A. L. Aguiar, E. C. Girão, Alexandre F. Fonseca, A. G. Souza Filho, and Douglas S. Galvao. "Mechanical Properties of Pentagraphene-based Nanotubes: A Molecular Dynamics Study." MRS Advances 3, no. 1-2 (2018): 97–102. http://dx.doi.org/10.1557/adv.2018.160.

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ABSTRACTThe study of the mechanical properties of nanostructured systems has gained importance in theoretical and experimental research in recent years. Carbon nanotubes (CNTs) are one of the strongest nanomaterials found in nature, with Young’s Modulus (EY) in the order 1.25 TPa. One interesting question is about the possibility of generating new nanostructures with 1D symmetry and with similar and/or superior CNT properties. In this work, we present a study on the dynamical, structural, mechanical properties, fracture patterns and EY values for one class of these structures, the so-called pe

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Bustillos Cotrado, Jose Antonio. "Análisis bidimensional de estabilidad del talud en una zona de falla geológica en Chinchao, Huánuco, Perú." Revista Científica de Ingeniería, Diseño y Arquitectura Contemporánea 1, no. 1 (2024): 7–15. http://dx.doi.org/10.37711/idac.2024.1.1.2.

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Objetivo. Evaluar la condición de estabilidad del talud en una zona de falla geológica por el método de equilibrio límite de la progresiva, km 37+700 al km 37+800 (ruta nacional PE+18A), en el centro poblado de Pachachupán, distrito de Chinchao, provincia y región de Huánuco. Métodos. Investigación de enfoque cuantitativo, nivel descriptivo de observación naturalista, tipo básico, y diseño no experimental. La muestra estuvo conformada por el talud más crítico a través de un criterio de muestreo no probabilístico intencionado. Resultados. El factor de seguridad para el análisis estático fue de

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Luján, Rafael, Marta Turegano-Lopez, Carolina Aguado, and Angel Merchan-Perez. "Two- and three-dimensional electron microscopy techniques: powerful tools for studying the brain under physiological and pathological conditions." Advanced Technology in Neuroscience 1, no. 2 (2024): 143–65. http://dx.doi.org/10.4103/atn.atn-d-24-00009.

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We are in the midst of a revolution in the fields of neuroanatomy and electron microscopy. The monumental advancements in the neuroscience field during the last decade have led to unprecedented scientific discoveries about our brain and to the development of new technologies and applications that have significantly contributed to such advances. Conventional applications of transmission electron microscopy have revolutionized neurosciences and are critical for determining the fine morpho-functional characterization of brain cells and their connections. Electron microscopy has progressively evol

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Álvarez-Villa, Oscar D., Santiago Ospina, Kevin Pérez, Gaspar Monsalve, Daniela Blessent, and Jaime Ignacio Vélez. "Implementación eficiente de un código en paralelo para resolver la ecuación de flujo subterráneo en medios heterogéneos y anisótropos." Aqua-LAC 9, no. 2 (2017): 01–14. http://dx.doi.org/10.29104/phi-aqualac/2017-v9-2-01.

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En este trabajo se presenta una implementación altamente eficiente que resuelve en paralelo la Ecuación en Derivadas Parciales de Flujo Subterráneo (EDPFS) en régimen transitorio y en tres dimensiones, linealizada aplicando diferentes esquemas de diferencias finitas. El código desarrollado considera los siguientes aspectos: (i) medios heterogéneos donde la conductividad hidráulica puede variar abruptamente en el espacio, (ii) medios anisótropos mediante el tensor no diagonal de conductividades hidráulicas, (iii) geometrías irregulares del acuífero y parametrizaciones variables en tiempo y espa

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Lima, Olivar Antônio Lima de. "GEOPHYSICAL CHARACTERIZATION OF AQUIFERS IN THE SALITRE RIVER BASIN, BAHIA STATE, BRAZIL, USING RESISTIVITY SOUNDINGS AND ELECTRICAL TOMOGRAPHIES." Revista Brasileira de Geofísica 32, no. 4 (2014): 637. http://dx.doi.org/10.22564/rbgf.v32i4.552.

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ABSTRACT. The Salitre River basin, which is located in the semi-arid land of northeastern Brazil, is annually faced with severe surface-water scarcity. Twomain aquifersystems, which are distributed in depth, can be exploited to supply the water needs of the population and its present agro-industrial development: (i) a fractured-karst,water-table component, totally developed within the upper carbonate sequence of the Salitre Formation; and (ii) a fractured-clastic, semi-confined component, mostlikely associating lower Salitre limestones with the meta-sandstones of the Morro do Chap´eu Formation

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Li, Hailiang, Hui Pan, Jianhu Gao, and Jinyong Gui. "Post-stack fracture prediction technique based on improved phase decomposition." Journal of Geophysics and Engineering, September 3, 2024. http://dx.doi.org/10.1093/jge/gxae088.

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Abstract Amplitude Variation with Azimuth (AVAZ) methods have a huge advantage in predicting small-scale fractures. However, the technique of using post-stack seismic data to predict fractures has rarely been investigated, with the main limiting factor being the degradation of resolution due to the stacking process, which makes it difficult to effectively identify small fractures. With the exploration and development of oil and gas fields entering into deeper levels, the traditional post-stack fracture prediction techniques often fail to meet the requirements of fine development. In this study

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13

Eremeyev, Victor A. "Minimal surfaces and conservation laws for bidimensional structures." Mathematics and Mechanics of Solids, July 27, 2022, 108128652211083. http://dx.doi.org/10.1177/10812865221108374.

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We discuss conservation laws for thin structures which could be modeled as a material minimal surface, i.e., a surface with zero mean curvatures. The models of an elastic membrane and micropolar (six-parameter) shell undergoing finite deformations are considered. We show that for a minimal surface, it is possible to formulate a conservation law similar to three-dimensional non-linear elasticity. It brings us a path-independent J-integral which could be used in mechanics of fracture. So, the class of minimal surfaces extends significantly a possible geometry of two-dimensional structures which

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14

Daguier, P., E. Bouchaud, and G. Lapasset. "A Model of Crack Propagation in a 2D Heterogeneous Material." MRS Proceedings 463 (1996). http://dx.doi.org/10.1557/proc-463-221.

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ABSTRACTA continuous numerical model of pure mode I crack propagation in a bidimensional heterogeneous material is presented. This model describes the propagation of a macrocrack into a two-phases brittle material containing a finite density of second phase precipitates. The morphology of cracks produced for various mechanical and microstructural conditions is analysed. It is shown that the simulated cracks are self-affine with a roughness index ≃ 0.6 independent of the microstructure. Relevant length scales, on the contrary, strongly depend on the microstructural parameters, and indicate an o

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15

Nguyen, Thuy, and Daniel Bonamy. "Size-dependency and lattice-discreetness effect on fracture toughness in 2D crystals under antiplanar loading." International Journal of Fracture, October 17, 2024. http://dx.doi.org/10.1007/s10704-024-00812-4.

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AbstractFracture toughness is the material property characterizing resistance to failure. Predicting its value from the solid structure at the atomistic scale remains elusive, even in the simplest situations of brittle fracture. We report here numerical simulations of crack propagation in two-dimensional fuse networks of different periodic geometries, which are electrical analogs of bidimensional brittle crystals under antiplanar loading. Fracture energy is determined from Griffith’s analysis of energy balance during crack propagation, and fracture toughness is determined from fits of the disp

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16

Graça-e-Costa, Rui, Faisal M. Mukhtar, and Daniel Dias-da-Costa. "Mesh-Independent Framework for the Bidimensional Analysis of CFRP–Concrete Debonding Shear Tests with Discrete Fracture." Journal of Composites for Construction 26, no. 3 (2022). http://dx.doi.org/10.1061/(asce)cc.1943-5614.0001216.

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17

German-Carcaño, Jesús Manuel, Guillermo Urriolagoitia-Sosa, Beatriz Romero-Ángeles, et al. "Estudio analítico y numérico de probetas agrietadas sometidas a tensión." Investigación y Ciencia de la Universidad Autónoma de Aguascalientes, no. 91 (January 31, 2024). https://doi.org/10.33064/iycuaa2024914481.

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Este trabajo describe la evaluación analítica del Factor de Intensidad de Esfuerzo (SIF) para cuatro especímenes, sometidos a una tensión de 15 MPa y una longitud de grieta de 25 mm. Posteriormente, con ayuda del programa ANSY S® se realizan las simulaciones numéricas donde se obtiene el SIF, para los especímenes estudiados analíticamente. Adicionalmente, se muestran los campos de esfuerzos σx, σy, τxy, σMax, min y σVon Mises cercanos a la punta de la fisura. A continuación, se calcula el porcentaje de variación de los análisis antes realizados, con resultados positivos en todos los casos (&lt

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18

Arango-Galván, Claudia, Brenda De la Torre-González, René E. Chávez-Segura, Andrés Tejero-Andrade, Gerardo Cifuentes-Nava, and Esteban Hernández-Quintero. "Structural pattern of subsidence in an urban area of the southeastern Mexico Basin inferred from electrical resistivity tomography." Geofísica Internacional 50, no. 4 (2011). http://dx.doi.org/10.22201/igeof.00167169p.2011.50.4.152.

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La mayor parte de la zona urbana de la Cuenca de México está construida sobre los sedimentos de los antiguos lagos de Chalco, Xochimilco, México, Texcoco, Xaltocan y Zumpango, lo cual ofrece poca resistencia a las obras civiles que se asientan sobre ella. Adicionalmente, los requerimientos para el abastecimiento de agua potable para la población han generado la sobreexplotación de los acuíferos, exacerbando el fenómeno de subsidencia y el colapso de edificios, unidades habitacionales y caminos. Con la finalidad de entender el patrón de fracturamiento, así como su ubicación, se implementó un es

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19

Fonseca, Edison, and Britney Jumbo. "Influencia del uso de la tomografía computarizada de haz cónico en endodoncia a través de los últimos años. Revisión literaria." June 1, 2024. https://doi.org/10.5281/zenodo.12801635.

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La endodoncia ha avanzado notablemente con la integración de la tomografía computarizada, especialmente la tomografía computarizada de haz cónico (CBCT), en la resolución de tratamientos complejos y en la simplificación del trabajo de los odontólogos. Esta tecnología proporciona imágenes tridimensionales detalladas, superando las limitaciones de las radiografías bidimensionales tradicionales. La CBCT permite detectar patologías ocultas, evaluar con precisión la anatomía dental y mejorar las decisiones te

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Ranganathan, Noopur, Alexandra F. Flaherty, Christopher W. DiGiovanni, Soheil Ashkani-Esfahani, and Lorena Bejarano-Pineda. "Normal Variation of the Lisfranc Joint: Tridimensional Analysis using Weight-Bearing Computed Tomography Imaging." Foot & Ankle Orthopaedics 8, no. 4 (2023). http://dx.doi.org/10.1177/2473011423s00358.

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Category: Midfoot/Forefoot; Trauma Introduction/Purpose: Untreated Lisfranc injuries can lead to chronic pain, midfoot arthritis, and functional disability 1,2,5. Approximately 20% of Lisfranc injuries are misdiagnosed or completely missed on initial evaluation, which can be attributed to a lack of parameters of what is within normal limits for subjects without injury in the Lisfranc complex3,4. The purpose of this study is to identify anatomic variations of unidimensional, bidimensional, and tridimensional (1D, 2D, 3D) measurements of the Lisfranc complex of normal individuals using weight-be

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Nello, Balossino, Coriasco Mario, and Rabellino Sergio. "Il problema dell'identificazione di forme: considerazioni sull'analisi fisionomica (The shape identification problem: some consideration about fisionomic analysis)." July 25, 2017. https://doi.org/10.13135/2532-7925/2303.

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<strong>English Abstract</strong> In the radiological diagnostic imaging, a right determination of shapes is a primary component to diagnose a disease or to assert its absence; the quality of the analysed images depends on technological factors, such as resolution, contrast or total energy, and also on postural factors: the correct positioning of the patient is crucial in order to correctly appreciate both the particular and the total anatomical segment in order to make a good diagnosis. In addition, except in particular situations, for instance such a search of a right oblique representation

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