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Showing 1 to 20 of 85 for “"Brittle Fracture"”.
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Brittle fracture
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Metallurgy, 1960.
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Brittle fracture in welded plate specimens
Includes bibliographical references (pages 43-44).
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Multiscale hybrid simulation of brittle fracture
When a brittle material is loaded to the limit of its strength, it fails by nucleation and propagation of a crack. The conditions for crack propagation are created by the concentration of a long-range stress field at an atomically sharp crack tip, creating a complex and strongly coupled multiscale …
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Crack growth during brittle fracture in compression.
Massachusetts Institute of Technology. Dept. of Geology and Geophysics. Thesis. 1965. Ph.D.
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A gradient-damage theory for quasi brittle fracture
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 …
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A Study of Brittle Fracture Initiation in Mild Steel
Made available in DSpace on 2014-12-05T17:37:31Z (GMT). No. of bitstreams: 1 6206099.pdf: 3522776 bytes, checksum: 2a849eeb8ba2cbca74d7aaf57c4e6ddc (MD5) Previous issue date: 1962
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Phase field modeling of dynamic brittle fracture at finite strains
Fracture is the total or partial separation of an initially intact body through the propagation of one or several cracks. Computational methods for fracture mechanics are becoming increasingly important in dealing with the nucleation and propagation of these cracks. One method is the phase field …
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Some Aspects of the Mechanics and Mechanisms of Dynamic Brittle Fracture
Previous research in dynamic fracture mechanics has focused largely on steady-state growth in the absence of reflected stress waves. This is because of the analytical and experimental complexities of studying crack propagation in finite geometries. For example, inadequate spatial and temporal …
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The Effect of Edge Conditions on The Tendency Toward Brittle Fracture of Structural Steels
Made available in DSpace on 2015-05-12T17:06:18Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 0010487.PDF: 4532779 bytes, checksum: c2da42bd06992430b09f08b0fb45c548 (MD5) Previous issue date: 1954
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Topology optimization of multimaterial and multiscale structures beyond elasticity: brittle fracture and ductile plasticity
… subjected to elasticity, plasticity, and fracture under both small and large deformations. The framework embraces both rigorous physics-based methods and general machine learning approaches to predict design performance, which is iteratively improved through gradient-based optimization. …
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Investigation of the fracture phenomena during the milling process of inorganic particulates and brittle fracture of polymer composites using fractal theory
… of applying Fractal mathematics and to the fracture of brittle particulates in Fluid Energy Mill devices, and in particular quantifying the resulting power law particle size distributions, examining the Surface Fractal Dimension of milled particulates, and relating the Izod Impact Strength …
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Linking sill morphology to emplacement mechanisms
… current models of sill emplacement assume that brittle fracture operates at all points of sill emplacement. Within this thesis, a series of observations are presented from sheet intrusions in South Africa, USA and the UK showing that in certain situations, dependent on host rock lithology, the …
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A Mixed Eulerian-Lagrangian Model for the Analysis of Dynamic Fracture (Finite Element Method, Moving Mesh, Virtual Energy Release Rate)
… for the analysis of static and dynamic brittle fracture problems based on a mixed Eulerian-Lagrangian kinematic model. Effective finite element computational methods based on the continuum formulations are also described.
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ΑΚΑΜΠΤΑ ΚΑΜΠΥΛΟΓΡΑΜΜΑ ΕΓΚΛΩΒΙΣΜΑΤΑ ΣΕ ΕΠΙΠΕΔΗ ΕΛΑΣΤΙΚΗ ΜΗΤΡΑ ΜΕ ΡΩΓΜΗ ΣΤΗ ΔΙΕΠΙΦΑΝΕΙΑ
… THE VICINITY OF THE CRACK TIP IS DERIVED AND THE BRITTLE FRACTURE OF THE BIMATERIAL SYSTEM IS STUDIED.
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The characterization of c-rate dependent hard carbon anode fracture induced by lithium intercalation
This study sought to evaluate hard carbon's fracture characteristics under different cycling rates due to its lithium solid solubility and isotropic nature. In addition to the evaluation, an electrochemical shock map was modified from a previous study to try and predict what conditions of particle …
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Aplicação do método dos elementos finitos a problemas planos da mecânica de fratura
In this work the problem of brittle fracture is discussed, attempting to obtain the stress intensity factors. In doing so a hybrid displacement finite element model is used. The fundamental concepts and theories of Fracture Mechanics are presented, firstly. Then, a hybrid functional, in which the …
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Multi-paradigm modeling of mode I&II dynamic fracture mechanisms in single crystal silicon
… and similar technologies. The understanding of fracture of silicon is crucial for the engineering process and the development of robust devices. However, the mechanisms of fracture in silicon are complex and are still not fully understood. Several experimental studies of fracture have been …
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Encapsulation of particles using brittle coatings for subterranean applications
The production of a brittle and moisture-resistant coating for particles, which reduce or "break" the viscosity of fracturing fluids, was explored.;The viscosity-reducer was ammonium persulfate. Polyurethane and acrylate coatings were investigated. The coated particles were assessed for dissolution …
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Fracture Behavior of Masonry Bond
The applied fracture mechanics model, when both elastic and inelastic deformations were considered, always over-estimated the post-peak behavior. However, the post-peak behavior was successfully predicted when the model was modified to consider only elastic deformation. The analysis indicated that …
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Effects of prior ductile tearing on cleavage fracture in the ductile-to-brittle transition region
… a/W ratio and prior ductile tearing on cleavage fracture toughness values ($J\sb{c}$) measured in the ductile-to-brittle transition region of ferritic materials. In the lower-transition region, cleavage fracture often occurs under conditions of large-scale yielding but without prior ductile crack …
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