Relevant bibliographies by topics / Quasi-brittle

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Quasi-brittle'

Author: Grafiati
Published: 4 June 2021
Last updated: 31 August 2024

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Journal articles on the topic "Quasi-brittle"

1

de With, G. "Environment induced failure of brittle and quasi-brittle materials." Materials Chemistry and Physics 75, no. 1-3 (April 2002): 229–34. http://dx.doi.org/10.1016/s0254-0584(02)00067-6.

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Berto, Filippo, Liviu Marsavina, Majid R. Ayatollahi, Sergei V. Panin, and Konstantinos I. Tserpes. "Brittle or Quasi-Brittle Fracture of Engineering Materials 2016." Advances in Materials Science and Engineering 2016 (2016): 1–2. http://dx.doi.org/10.1155/2016/7094298.

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Zhang, Liang, and Wenbin Yu. "Constitutive modeling of damageable brittle and quasi-brittle materials." International Journal of Solids and Structures 117 (June 2017): 80–90. http://dx.doi.org/10.1016/j.ijsolstr.2017.04.002.

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Kornev, V. M., and A. A. Zinov’ev. "Quasi-brittle rock failure model." Journal of Mining Science 49, no. 4 (July 2013): 576–82. http://dx.doi.org/10.1134/s1062739149040084.

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5

Chen, Tielin, Chao Li, and Dingli Zhang. "A Numerical Simulation of Effects of Softening and Heterogeneity on the Stress Intensity Factor of Quasi-Brittle Material." Advances in Mechanical Engineering 6 (January 1, 2014): 586472. http://dx.doi.org/10.1155/2014/586472.

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A numerical approach to simulate the crack initiation and propagation process of the nonlinear fracture behavior of the quasi-brittle materials under tensile loading is presented. The nonlinear fracture of Mode I of quasi-brittle material is analyzed by considering the effects of microscopic softening rate and heterogeneity. The results show that the softening rate and the heterogeneity of quasi-brittle material affect the values of stress intensity factor K I. The softening index affects merely the size of the plastic zones while the heterogeneity causes the more sophisticated response of quasi-brittle materials.
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Vala, Jiří. "Numerical approaches to the modelling of quasi-brittle crack propagation." Archivum Mathematicum, no. 3 (2023): 295–303. http://dx.doi.org/10.5817/am2023-3-295.

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7

Karpas, E., and F. Kun. "Disorder-induced brittle–to–quasi-brittle transition in fiber bundles." EPL (Europhysics Letters) 95, no. 1 (June 21, 2011): 16004. http://dx.doi.org/10.1209/0295-5075/95/16004.

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Zhao, Yishu. "Bi-parametric criterion applied to brittle and quasi-brittle fracture." Engineering Fracture Mechanics 49, no. 1 (September 1994): 133–41. http://dx.doi.org/10.1016/0013-7944(94)90117-1.

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9

Malkin, A. I., F. A. Kulikov-Kostyushko, and T. A. Shumikhin. "Statistical kinetics of quasi-brittle fracture." Technical Physics 53, no. 3 (March 2008): 334–42. http://dx.doi.org/10.1134/s1063784208030080.

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Shah, S. P., and C. Ouyang. "Toughening Mechanisms in Quasi-Brittle Materials." Journal of Engineering Materials and Technology 115, no. 3 (July 1, 1993): 300–307. http://dx.doi.org/10.1115/1.2904222.

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Fracture processes in cement-based materials are characterized by a large-scale fracture process zone, localization of deformation, and strain softening. Many studies have been conducted to understand the toughening mechanisms of such quasi-brittle materials and to theoretically model their nonlinear response. This paper summarizes two innovative experimental techniques which are being developed at the ACBM Center to better define the fracture process zone in cement-based materials. A brief summary is also given of two types of theoretical approaches which attempt to simulate some of the observed nonlinear fracture response of these materials.
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Dissertations / Theses on the topic "Quasi-brittle"

1

Alnaas, Waled. "Nonlinear finite element analysis of quasi-brittle materials." Thesis, Cardiff University, 2016. http://orca.cf.ac.uk/93465/.

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The development of robust solution schemes for the nonlinear finite element analysis of quasi-brittle materials has been a challenging undertaking, due mainly to the stability and convergence difficulties associated with strain-softening materials. The work described in this thesis addresses this issue by proposing a new method for improving the robustness and convergence characteristics of a finite element damage model. In this method, a smooth unloading-reloading function is employed to compute an approximate tangent matrix in an incremental iterative Newton type solution procedure. The new method is named ‘the smooth unloading-reloading’ (SUR) method. A range of examples, based on a set of idealised quasi-brittle specimens, are used to assess the performance of the SUR method. The results from these example analyses show that the proposed approach is numerically robust, effective and results in considerable savings relative to solutions obtained with a reference secant model. Three acceleration approaches are also proposed in this thesis to further improve the convergence properties of the new SUR method. The first acceleration approach, named ‘the predictive-SUR method’, predicts a converged value of a damage evolution variable using an extrapolation in semi-log space. The second proposed method is designated ‘the fixing approach’, in which a damage evolution parameter is updated from the last converged step in Stage-1 iterations and then fixed in Stage-2 iterations. The third acceleration technique employs ‘a slack tolerance’ at key stages in a computation. The improvement of the convergence properties of the SUR method, when the proposed acceleration approaches are introduced, is illustrated using a series of example computations based on the analysis of a range of plain and reinforced concrete structural elements. In addition, a new element with an embedded strong discontinuity is proposed for simulating cracks in quasi-brittle structures. The new formulation is applied to quadrilateral elements and exploited to simulate mode-I, mode-II and mixed mode fracture. The interface element approach and the smeared crack approach are used as reference methods. The results from a series of examples show that the new proposed embedded strong discontinuity approach is both effective and accurate.
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2

Mühlich, Uwe. "Generalised continuum approach for modelling quasi-brittle failure." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2014. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-137217.

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A proper description of quasi-brittle failure within the frame of continuum Mechanics can only be achieved by models based on so-called generalised continua. This thesis focuses on a strain gradient generalised continuum and provides a specific methodology to derive corresponding models which account for the essential features of quasi-brittle failure. This methodology is discussed by means of four peer-reviewed journal articles. Furthermore, an extensive overview of the state of the art in the field of generalised continua is given at the beginning of the thesis. This overview discusses phenomenological extensions of standard Continuum Mechanics towards generalised continua together with corresponding homogenisation strategies for materials with periodic or random microstructure
Eine geeignete, kontinuumsmechanische Beschreibung quasi-spröden Versagens ist nur unter Verwendung verallgemeinerter Kontinuumstheorien möglich. In dieser Habilitationsschrift stehen sogenannte Gradientenkontinua im Vordergrund. Für diese wird eine Methodik vorgeschlagen, welche die Herleitung von Modellen erlaubt, die in der Lage sind, quasi-sprödes Versagen adäquat abzubilden. Diese Methodik wird anhand von vier Publikationen dargestellt und diskutiert. Ein umfangreicher Überblick über den Stand der Forschung auf dem Gebiet der veralgemeinerten Kontinuumstheorien wird am Anfang der Habilitationschrift gegeben. Dabei werden neben phänomenologischen Ansätzen zur Ableitung verallgemeinerter Kontinuumstheorien auch die entsprechenden Homogenisierungskonzepte dargestellt. Letztere werden für Materialien mit periodischer Mikrostruktur und für Materialien mit zufälliger Mikrostruktur diskutiert
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Narayan, Sooraj. "A gradient-damage theory for quasi brittle fracture." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/122236.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2019
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 73-77).
Phase-field modeling of brittle fracture of linear elastic solids has been the subject of several studies in the past 25 years. An attractive feature of this approach to model fracture is its seamless ability to simulate the complicated fracture processes of nucleation, propagation, branching and merging of cracks in arbitrary geometries. While most existing models have focussed on fracture of "ideal brittle" materials, we consider fracture of "quasi-brittle" materials. The material is considered to be quasi-brittle in the sense that it does not lose its entire load-carrying capacity at the onset of damage. Instead there is a gradual degradation of the strength of the material, which is the result of microscale decohesion/damage micromechanisms. In this thesis we discuss the formulation of our gradient-damage theory for quasi-brittle fracture using the virtual-power method. The macro- and microforce balances, obtained from the virtual power approach, together with a standard free-energy imbalance law under isothermal conditions, when supplemented with a set of thermodynamically-consistent constitutive equations will provide the governing equations for our theory. We have specialized our general theory to formulate a simple continuum model for fracture of concrete - a quasi-brittle material of vast importance. We have numerically implemented our theory in a finite element program, and simulated numerical examples which show the ability of the simulation capability to reproduce the macroscopic characteristics of the failure of concrete in several technically relevant geometries reported in the literature..
by Sooraj Narayan.
S.M.
S.M. Massachusetts Institute of Technology, Department of Mechanical Engineering
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Xenos, Dimitrios. "Nonlocal modelling of fracture in heterogeneous quasi-brittle materials." Thesis, University of Glasgow, 2015. http://theses.gla.ac.uk/6515/.

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Integral-type nonlocal models provide a mesh-independent description of fracture in quasi-brittle materials. According to these constitutive models, the stress at a point is evaluated by a weighted average of the variable describing the state of the material in the vicinity of this point. The weights of the material points depend on a model parameter, called interaction radius, that controls the size of the final failure zones. The objective of the present thesis is to develop nonlocal models, that can provide a realistic description of failure in quasi-brittle materials. In particular, it is aimed to identify a realistic approach to take into account boundaries. Furthermore, a strategy to calibrate the nonlocal radius is developed. It is also required to demonstrate that the nonlocal models can describe fracture in reinforced concrete structures mesh-independently. The performance of different nonlocal models in analysing boundaries is investigated. Nonlocal damage models with different averaging schemes as well as nonlocal and overnonlocal damage-plasticity models are applied to analyse failure in beams subjected to three-point bending. The original formulation of nonlocal averaging and the overnonlocal damage-plasticity model lead to excessive energy dissipation close to boundaries compared to meso-scale analysis results. The spurious energy dissipation is reduced in the analyses with the modified averaging schemes. A new calibration strategy to determine the interaction radius is proposed based on the final experimental fracture patterns. The main assumption is that the majority of energy is dissipated in a localised rough crack and is validated based on meso-scale analyses results. The potential of the calibration strategy was shown by applying it to calibrate a nonlocal damage model based on the experimental fracture surface and load-displacement curve of a beam subjected to three-point bending. Furthermore, a nonlocal extension of the damage-plasticity model CDPM2 is applied in the analyses of a reinforced concrete beam and a column. These experiments were selected because both localised and distributed cracking are experimentally observed and the material points are subjected to various stress states. It was illustrated that nonlocal models describe failure in reinforced concrete mesh-independently.
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Brooks, Zenzile (Zenzile Z. ). "Fracture process zone : microstructure and nanomechanics in quasi-brittle materials." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/82831.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, 2013.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 343-355).
Cracks begin (and end) at a crack tip; the "Fracture Process Zone" (FPZ) is a region of damage around the crack tip. The context of this research is the FPZ in quasi-brittle materials, which is characterized by cracking at various scales. This study focuses on crack propagation and FPZ development at a fundamental material scale: the scale of the grain. With regard to the FPZ, the study seeks to understand how the FPZ develops and manifests in quasi-brittle material, what the physical and mechanical structure of the FPZ is, and how pre-existing material microstructure influences the developed FPZ. The attainment of several research objectives marks the course of the investigation: the development of a multi-disciplinary technique to assess both intact and FPZ regions of quasi-brittle material, the assessment of the fundamental properties (microstructure, small-scale mechanical properties) of intact and FPZ quasi-brittle material, and a conceptual model of FPZ development in quasi-brittle material. In pursuit of these objectives, the study uses nanoindentation to probe the nanomechanical properties of the FPZ for two marbles of varying grain size, and microscopy to probe the structure of the FPZ at the grain scale. The marbles are from Carrara, Italy (typical grain size 300 m), and Danby, Vermont (typical grain size 520 m). Grids of nanoindentations and microscopy were placed within the FPZ regions of Danby and Carrara marble specimens. Both marbles exhibited lower nanomechanical properties near the crack tip and/or near the area of future wing-crack formation, i.e. the FPZ. However, the Danby marble exhibited this trend over a larger distance, and thus nanomechanically supports the increase of the FPZ with grain size. The microscopy investigations suggested increased microcracking near FPZ regions, and increased microcrack density with decreased grain size. Ultimately the study provides four contributions to the study of fracture of quasi-brittle materials: an algorithm for the automatic assessment of microcracking from ESEM micrographs, new nanomechanical information on the two marble types, validation of the use of nanomechanics as a tool for identifying damage in quasi-brittle materials, and a quantitative assessment of the role of grain size in the damage of quasi-brittle materials.
by Zenzile Brooks.
Ph.D.
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6

Berthier, Estelle. "Quasi-brittle failure of heterogeneous materials : damage statistics and localization." Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066588/document.

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Nous proposons une nouvelle approche inspirée des modèles d'endommagement non-locaux pour décrire la ruine des matériaux quasi-fragiles désordonnés. Les hétérogénéités matériaux sont introduites à une échelle continue mésoscopique via des variations spatiales de la résistance à l'endommagement alors que le mécanisme de redistribution des contraintes est décrit à travers une fonction d'interaction que l'on peut faire varier. L'évolution spatio-temporelle de l'endommagement est déterminée à partir du principe de conservation d'énergie et caractérisée via une étude statistique des précurseurs à la rupture. Cette approche nous permet de prédire la valeur des seuils de localisation et de rupture en fonction de la nature des redistributions. A l'approche de la rupture, nous mettons également en évidence une augmentation en loi de puissance du taux d'énergie dissipée ainsi qu'une longueur de corrélation, supportant l'interprétation de la rupture quasi-fragile comme un phénomène critique. En effet, nous démontrons que notre model d'endommagement s'apparente à la loi d'évolution d'une interface élastique évoluant dans un milieu désordonné. Cette analogie nous permet d'identifier les paramètres d'ordre et de contrôle de cette transition critique et d'expliquer les invariances d'échelle des fluctuations dans la limite champ moyen. Enfin, nous appliquons ces concepts théoriques à travers l'étude expérimentale de la compression d'un empilement bidimensionnel de cylindres élastiques. Notre approche permet de décrire de façon quantitative la réponse mécanique non-linéaire du matériau, et en particulier la statistique des précurseurs ainsi que la localisation des déformations
We propose a novel approach inspired from non-local damage continuum mechanics to describe damage evolution and quasi-brittle failure of disordered solids. Heterogeneities are introduced at a mesoscopic continuous scale through spatial variations of the material resistance to damage. The central role played by the load redistribution during damage growth is analyzed by varying the interaction function used in the non-local model formulation. The spatio-temporal evolution of the damage field is obtained from energy conservation arguments, so that the formulation is thermodynamically consistent. We analytically determine the onsets of localization and failure that appear controlled by the redistribution function. Damage spreading is characterized through a complete statistical analysis of the spatio-temporal organization of the precursors to failure. The power law increase of the rate of energy dissipated by damage and an extracted correlation length close to failure supports the interpretation of quasi-brittle failure as a critical phenomena. Indeed, we establish a connection between our damage model and the evolution law of an elastic interface driven in a disordered medium. It allows to identify the order and control parameters of the critical transition, and capture the scale-free statistical properties of the precursors within the mean field limit. Finally, we experimentally investigate the coaction of localized dissipative events and elastic redistributions in disordered media via compression experiments of two-dimensional arrays of hollow soft cylinders. Our experimental observations show a quantitative agreement with the predictions derived following our approach
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Kourepinis, Dimitrios. "Higher-order discontinuous modelling of fracturing in quasi-brittle materials." Thesis, Connect to e-thesis, 2008. http://theses.gla.ac.uk/370/.

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Thesis (Ph.D.) - University of Glasgow, 2008.
Ph.D. thesis submitted to the Department of Civil Engineering, Faculty of Engineering, University of Glasgow, 2008. Includes bibliographical references. Print version also available.
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8

Kabeel, Abdallah Mahmoud Bayoumi. "Nominal strength and size effect of quasi-brittle structures with holes." Doctoral thesis, Universitat de Girona, 2015. http://hdl.handle.net/10803/289985.

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The main contribution of this work is to introduce analytical models able to create simple design charts that would allow designers to quickly determine the strength of quasi-brittle structures containing circular holes. Cohesive Zone Models are an excellent tool to model quasi-brittle structures with holes in which a large failure process zone is confined in a plane. Also, the CZM is able to predict the effect of the structure size on its strength. Moreover, it is one of the few models (or the only model) that takes into account the material cohesive law explicitly. Therefore, most of the presented models in this work are based on the cohesive zone model.
La principal contribució d'aquest treball és la dʼintroduïr un model analític capaç de generar diagrames de disseny que permeten obtenir la resistència nominal dʼestructures quasi-fràgils que continguin forats. Els models de zona cohesiva permeten predir la resistencia dʼestructures amb forats formades de materials quasi-fràgils amb una gran zona de procés de fallada confinada en un pla. Aquests models també són capaços de predir lʼefecte de la mida de lʼestructura en la resistència nominal. A mès els models de zona cohesiva són un dels pocs (o els únics) que consideren dʼuna manera explítica la llei cohesiva en la seva formulació. Per aquestes raons, la majoria de resultats presentats es basen en els models de zona cohesiva.
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Klerck, Paul Alexander. "The finite element modelling of discrete fracture in quasi-brittle materials." Thesis, Swansea University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.539299.

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An effective methodology for discrete fracture in quasi-brittle material is presented within an explicit finite discrete element framework. Simple pragmatic models are envisaged that reflect the data deficiency of the quasi-brittle material and recover the observed physical response within engineering accuracy. Phenomenological strain-softening constitutive models are adopted for the modelling of micromechanical processes in an average sense. An extensional basis for fracture is assumed in both tensile and compressive stress fields, with only the mechanism with which inelastic strain is realised differing between the two stress states. To overcome the mesh dependence introduced by local softening constitutive relationships, the socalled localisation limiters are adopted in the form of the tensile crack band, nonlocal and viscous smeared crack models. Effective localisation lengthscales introduced by these regularisation methods ensure mesh objective failure localisation a priori to discrete crack insertion. A nonlocal map of failure indicators initiates fracture, with discrete cracks inserted into the finite element continuum by the splitting of the discretisation. An isotropic, non-associative Mohr-Coulomb model is derived in principal stress space as a first order approximation to the quasi-brittle response in compression. A model for discrete fracture in tensile and compressive stress fields is proposed, defined by a composite yield surface consisting of the fully anisotropic rotating crack band model coupled with the isotropic, non-associative Mohr-Coulomb model. The novel inclusion of an explicit coupling between the extensional inelastic dilation strain accrued during compressive failure and tensile strength degradation in the dilation directions permits the realisation of discrete fracturing in purely compressive stress fields. The so-called continuum-discrete transition introduces additional degrees of freedom into quasi-brittle systems and permits large deformation to be realised through the process of cataclastic flow. This advancement is considered significant and necessary in the recovery of the observed quasi-brittle response. The effectiveness of the proposed constitutive fracture models is verified by application to a number of physical quasi-brittle fracture systems, including borehole breakout, fracturing around excavations, strip punch tests, dynamic spalling and anchor pullout tests, amongst others.
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Wang, Xiaofeng. "Computational technology for damage and failure analysis of quasi-brittle materials." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/computational-technology-for-damage-and-failure-analysis-of-quasibrittle-materials(a7c91eb6-5058-4e73-95de-b2f3efd645d2).html.

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The thesis presents the development and validation of novel computational technology for modelling and analysis of damage and failure in quasi-brittle materials. The technology is demonstrated mostly on concrete, which is the most widely used quasi-brittle material exhibiting non-linear behaviour. Original algorithms and procedures for generating two-dimensional (2D) and three-dimensional (3D) heterogeneous material samples are developed, in which the mesoscale features of concrete, such as shape, size, volume fraction and spatial distribution of inclusions and pores/voids are randomised. Firstly, zero-thickness cohesive interface elements with softening traction-separation relations are pre-inserted within solid element meshes to simulate complex crack initiation and propagation. Monte Carlo simulations (MCS) of 2D and 3D uniaxial tension tests are carried out to investigate the effects of key mesoscale features on the fracture patterns and load-carrying capacities. Size effect in 2D concrete is then investigated by finite element analyses of meso-structural models of specimens with increasing sizes. Secondly, a 3D meso-structural damage-plasticity model for damage and failure analysis of concrete is developed and applied in tension and compression. A new scheme for identifying interfacial transition zones (ITZs) in concrete is presented, whereby ITZs are modelled by very thin layers of solid finite elements with damage-plasticity constitutive relations. Finally, a new coupled method named non-matching scaled boundary finite element-finite element coupled method is proposed to simulate crack propagation problems based on the linear elastic fracture mechanics. It combines the advantage of the scaled boundary finite element method in modelling crack propagation and also preserves the flexibility of the finite element method in re-meshing. The efficiency and effectiveness of the developed computational technology is demonstrated by simulations of crack initiation and propagation problems.
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Books on the topic "Quasi-brittle"

1

Gils, M. Van. Quasi-brittle fracture of ceramics. Eindhoven: University of Eindhoven, 1997.

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Shah, S. P., ed. Toughening Mechanisms in Quasi-Brittle Materials. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3388-3.

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P, Shah S., and North Atlantic Treaty Organization. Scientific Affairs Division., eds. Toughening mechanisms in quasi-brittle materials. Dordrecht, Netherlands: Kluwer Academic Publishers, 1991.

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Shah, S. P. Toughening Mechanisms in Quasi-Brittle Materials. Dordrecht: Springer Netherlands, 1991.

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P, Shah S., Swartz Stuart E, and Wang M. L, eds. Micromechanics of failure of quasi-brittle materials. London: Elsevier Applied Science, 1990.

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E, Swartz Stuart, and Ouyang Chengsheng, eds. Fracture mechanics of concrete: Applications of fracture mechanics to concrete, rock and other quasi-brittle materials. New York: Wiley, 1995.

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Workshop on Mechanics of Quasi-Brittle Materials and Structures (1998 Česká Technická Univerzita v Praze). Mechanics of quasi-brittle materials and structures: A volume in honour of Professor Zdenek P. Bazant 60th birthday. Edited by Bažant Z. P, Bittnar Zdeněk, Gérard Bruno, and Pijaudier-Cabot Gilles. Paris: Hermes Science, 1999.

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Toughening Mechanisms in Quasi-Brittle Materials. Island Press, 1991.

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Micromechanics of Failure of Quasi-Brittle Materials. Routledge, 1990.

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Mechanics of quasi-brittle materials and structures. Hermes, 1999.

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Book chapters on the topic "Quasi-brittle"

1

Banichuk, N. V., and Pekka Neittaanmäki. "Brittle and Quasi-Brittle Materials." In Structural Optimization with Uncertainties, 103–13. Dordrecht: Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-90-481-2518-0_9.

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Rudnicki, John W. "Toughening Mechanisms in Quasi-Brittle Materials." In Toughening Mechanisms in Quasi-Brittle Materials, 203–5. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3388-3_12.

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Valoroso, Nunziante, and Claude Stolz. "Progressive Damage in Quasi-brittle Solids." In Lecture Notes in Mechanical Engineering, 408–18. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-41057-5_34.

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Hu, Xiaozhi, and Li Liang. "Elastic-Plastic and Quasi-Brittle Fracture." In Handbook of Mechanics of Materials, 1–32. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-6855-3_38-1.

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Hu, Xiaozhi, and Li Liang. "Elastic-Plastic and Quasi-Brittle Fracture." In Handbook of Mechanics of Materials, 1785–816. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-10-6884-3_38.

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Zok, Frank. "The Fracture Resistance of Brittle Matrix Composites." In Toughening Mechanisms in Quasi-Brittle Materials, 425–39. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3388-3_27.

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Wanner, A., G. Rizzo, and K. Kromp. "Quasi-Ductile Behaviour of Carbon-Reinforced Carbon." In Toughening Mechanisms in Quasi-Brittle Materials, 405–23. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3388-3_26.

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Faber, K. T., W. H. Gu, H. Cai, R. A. Winholtz, and D. J. Magley. "Fracture Properties of SiC-Based Particulate Composites." In Toughening Mechanisms in Quasi-Brittle Materials, 3–17. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3388-3_1.

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Kemeny, John M., and Neville G. W. Cook. "Micromechanics of Deformation in Rocks." In Toughening Mechanisms in Quasi-Brittle Materials, 155–88. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3388-3_10.

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Planas, J., and M. Elices. "Asymptotic Analysis of Cohesive Cracks and Its Relation with Effective Elastic Cracks." In Toughening Mechanisms in Quasi-Brittle Materials, 189–202. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3388-3_11.

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Conference papers on the topic "Quasi-brittle"

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Hu, Xiaozhi, and Kai Duan. "Size effect on quasi-brittle fracture." In SPIE Proceedings, edited by Jose F. Lopez, Chenggen Quan, Fook Siong Chau, Francisco V. Fernandez, Jose Maria Lopez-Villegas, Anand Asundi, Brian Stephen Wong, Jose M. de la Rosa, and Chwee Teck Lim. SPIE, 2005. http://dx.doi.org/10.1117/12.621534.

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Gao, Zhenyuan, Liang Zhang, and Wenbin Yu. "A nonlocal constitutive model for damageable brittle and quasi-brittle materials." In 58th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2017. http://dx.doi.org/10.2514/6.2017-0654.

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Skripnyak, Evgeniya G., Vladimir A. Skripnyak, Vladimir V. Skripnyak, Natalia V. Skripnyak, and Irina K. Vaganova. "BRITTLE OR QUASI-BRITTLE FRACTURE OF CERAMIC NANOCOMPOSITES UNDER DYNAMIC LOADING." In VII European Congress on Computational Methods in Applied Sciences and Engineering. Athens: Institute of Structural Analysis and Antiseismic Research School of Civil Engineering National Technical University of Athens (NTUA) Greece, 2016. http://dx.doi.org/10.7712/100016.1819.11114.

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Vala, Jiří. "Nonlocal damage modelling of quasi-brittle composites." In INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS ICNAAM 2019. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0027268.

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Vala, Jiri, Vladislav Kozak, and Petra Jarosova. "On the nonlocal computational modelling of damage in brittle and quasi-brittle materials." In 2020 24th International Conference on Circuits, Systems, Communications and Computers (CSCC). IEEE, 2020. http://dx.doi.org/10.1109/cscc49995.2020.00039.

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Yu, Rena C., Luis Saucedo, and Gonzalo Ruiz. "A Probabilistic Fatigue Model for Quasi-Brittle Materials." In 2014 International Conference on Computer, Communications and Information Technology (CCIT 2014). Paris, France: Atlantis Press, 2014. http://dx.doi.org/10.2991/ccit-14.2014.84.

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He, Junlian, and Mingtian Li. "Cellular Automata to Simulate Split of Quasi-Brittle Materials." In 2010 International Conference on E-Product E-Service and E-Entertainment (ICEEE 2010). IEEE, 2010. http://dx.doi.org/10.1109/iceee.2010.5660489.

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Cornet, Antoine, David S. Eastwood, Neil K. Bourne, Paul M. Mummery, Carl M. Cady, and Cristoph Rau. "Advances on mode I fracture testing in brittle and quasi-brittle materials with x-ray tomography." In SHOCK COMPRESSION OF CONDENSED MATTER - 2019: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter. AIP Publishing, 2020. http://dx.doi.org/10.1063/12.0000931.

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Kostandov, Yu A., P. V. Makarov, and M. O. Eremin. "Experimental and numerical study of quasi-brittle fracture of rocks." In INTERNATIONAL CONFERENCE ON PHYSICAL MESOMECHANICS OF MULTILEVEL SYSTEMS 2014. AIP Publishing LLC, 2014. http://dx.doi.org/10.1063/1.4898942.

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Qi Cheng-zhi, Qian Qihu, Wu Hui, Chen Jianjie, and Wang Mingyang. "Interconnection between size and strain rate effects of quasi-brittle materials." In 3rd International Conference on Contemporary Problems in Architecture and Construction. IET, 2011. http://dx.doi.org/10.1049/cp.2011.1194.

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Reports on the topic "Quasi-brittle"

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Chen, Z., and H. L. Schreyer. Formulation and computational aspects of plasticity and damage models with application to quasi-brittle materials. Office of Scientific and Technical Information (OSTI), September 1995. http://dx.doi.org/10.2172/120890.

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Shah, Surendra P. Workshop Proceedings: Toughening Mechanisms in Quasi-Brittle Materials Held on 16-20 July 1990 in Evanston, Illinois. Fort Belvoir, VA: Defense Technical Information Center, May 1991. http://dx.doi.org/10.21236/ada238289.

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Shah, Surendra P. NATO Advanced Research Workshop. Toughening Mechanisms in Quasi-Brittle Materials, Held in Evanston, Illinois on July 16-20, 1990. Fort Belvoir, VA: Defense Technical Information Center, July 1990. http://dx.doi.org/10.21236/ada225849.

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Lever, James, Austin Lines, Susan Taylor, Garrett Hoch, Emily Asenath-Smith, and Devinder Sodhi. Revisiting mechanics of ice–skate friction : from experiments at a skating rink to a unified hypothesis. Engineer Research and Development Center (U.S.), December 2021. http://dx.doi.org/10.21079/11681/42642.

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Abstract:
The mechanics underlying ice–skate friction remain uncertain despite over a century of study. In the 1930s, the theory of self-lubrication from frictional heat supplanted an earlier hypothesis that pressure melting governed skate friction. More recently, researchers have suggested that a layer of abraded wear particles or the presence of quasi-liquid molecular layers on the surface of ice could account for its slipperiness. Here, we assess the dominant hypotheses proposed to govern ice– skate friction and describe experiments conducted in an indoor skating rink aimed to provide observations to test these hypotheses. Our results indicate that the brittle failure of ice under rapid compression plays a strong role. Our observations did not confirm the presence of full contact water films and are more consistent with the presence of lubricating ice-rich slurries at discontinuous high-pressure zones (HPZs). The presence of ice-rich slurries supporting skates through HPZs merges pressure-melting, abrasion and lubricating films as a unified hypothesis for why skates are so slippery across broad ranges of speeds, temperatures and normal loads. We suggest tribometer experiments to overcome the difficulties of investigating these processes during actual skating trials.
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Wilkowski, G. M., D. Rudland, P. Mincer, B. Metrovich, and D. Rider. ASME-PVP05 Brittle-to-Ductile Fracture Initiation Transition Temperature for Old Linepipe w Surface-Crack. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), January 2005. http://dx.doi.org/10.55274/r0011772.

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Much work has been done to assess constraint effects on the crack-driving force for specimens and cracks in pipes. The material's transition temperature where the fracture process changes from ductile tearing to cleavage fracture at crack initiation is affected by the constraint conditions but is a material property that cannot be determined analytically. This paper presents a methodology to account for constraint effects to predict the lowest temperature where ductile fracture initiation occurs and relates that temperature back to Charpy impact data for X60 and lower grades, particularly for older vintage linepipe materials. The method involves a series of transition temperature shifts to account for thickness effects, strain-rate effects, and constraint effects to give a master curve of transition temperatures from Charpy data to through-wall-cracked or surface-cracked pipes (with various a/t values) under quasi-static loading. These transition temperature shifts were based on hundreds of pipe tests and thousands of specimen tests over several decades of work by numerous investigators. This method is being validated by examining 1927 and 1948 vintage linepipe steels. In addition, data have been developed on the 1927 vintage pipe material to assess the effect of the bluntness of a corrosion flaw on the lowest temperature where ductile fracture will still initiate under quasi-static loading. An additional transition temperature shift occurs as a function of the bluntness of the flaw.
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