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Author : Soma Sekhar Venkata Kandula
Publisher :
ISBN 13 :
Total Pages : 134 pages
Book Rating : 4.:/5 (564 download)
Download or read book Cohesive Modeling of Fracture in Functionally Graded Materials written by Soma Sekhar Venkata Kandula and published by . This book was released on 2004 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Daniel W. Spring
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (774 download)
Download or read book Cohesive Zone Modeling of Fracture of Sustainable and Functionally Graded Concrete written by Daniel W. Spring and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: There is a constant demand from the industry to provide better, more situation dependent construction materials; materials which are able to satisfy strength requirements while also able to accommodate other design requirements such as ductility, fracture resistance, thermal resistance/insulation, etc. Functionally graded materials (FGMs) are one such material. This study investigates the fracture process of sustainable concrete, fiber reinforced concrete, and of functionally graded concrete slabs. Both two-dimensional and three-dimensional problems are analyzed. The primary focus of the thesis is on sustainable, functionally graded concrete slabs, emphasizing the computational/mechanical aspects of fracture. A model of the slabs is developed; which incorporates a variety of cohesive zone models (CZMs) into an implicit, nonlinear finite element scheme. Intrinsic cohesive zone elements, with traction-separation relationships defined along the crack surface, are utilized to simulate mode I fracture of the slabs. Based on the load to crack mouth opening displacement (CMOD) relationships of the slab, one is able to optimize concrete properties and placement to reach predefined goals. A parametric study is conducted on the fracture parameters of the slab; the results of which show that the variations in the CZMs have a direct correlation with the overall behaviour of the slab. Additionally, in conducting the experiments for the slabs, a new fracture test for concrete is developed. The attractive feature of the test is that it uses a specimen geometry which is easily obtained from in-situ concrete in the field. Technology exists which allows us to extract cylindrical cores from concrete structures at relative ease. This study proposes a specimen geometry which can easily be developed from these cylindrical cores called the disk-shaped compact tension (DCT) specimen. A series of experiments are conducted on the specimen, and computational simulations are carried out. A parametric study is done; the results of which, show that the specimen geometry is able to predict the mode I fracture properties of concrete, with both virgin and recycled aggregates, with relative accuracy and ease.
Author : G.H. Paulino
Publisher : Elsevier
ISBN 13 : 9780080441603
Total Pages : 306 pages
Book Rating : 4.4/5 (416 download)
Download or read book Fracture of Functionally Graded Materials written by G.H. Paulino and published by Elsevier. This book was released on 2002-10-23 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientific research on functionally graded materials (FGM's) looks at functions of gradients in materials comprising thermodynamic, mechanical, chemical, optical, electromagnetic, and/or biological aspects. This collection of technical papers represents current research interests with regard to the fracture behaviour of FGM's. The papers provide a balance between theoretical, computational, and experimental techniques. It also indicates areas for increased development, such as constraint effects, full experimental characterization of engineering FGM's under static and dynamic loading, development of fracture criteria with predictive capability, multiphysics and multiscale failure considerations, and connection of research with industrial applications.
Author : G. H. Paulino
Publisher :
ISBN 13 :
Total Pages : 294 pages
Book Rating : 4.:/5 (437 download)
Download or read book Fracture of Functionally Graded Materials written by G. H. Paulino and published by . This book was released on 2002 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 62 pages
Book Rating : 4.:/5 (227 download)
Download or read book Fracture Mechanics of Functionally Graded Materials written by and published by . This book was released on 1996 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: Functionally graded materials are generally two-phase composites with continuously varying volume fractions. Used as coatings and interfacial zones, they help to reduce mechanically and thermally induced stresses caused by the material property mismatch and to improve the bonding strength. In this project some basic problems concerning fracture mechanics of graded materials are identified, general analytical methods for solving the related crack problems are developed, the singular behavior of the solutions for typical material nonhomogeneities is examined, and solutions of some benchmark problems are obtained. The results are intended to provide technical support for material scientists and engineers who are trying to develop methods for processing these materials and for design engineers who are interested in using them in technological applications. Typical applications of functionally graded materials include thermal barrier coatings of high temperature components in gas turbines, surface hardening for tribological protection, and as interlayers in microelectronic and optoelectronic components. The results found show that by eliminating the discontinuities in material property distributions the mathematical anomalies regarding the crack tip stress oscillations for the interface cracks and the nonsquare root singularities for cracks intersecting the interfaces are also eliminated. From the viewpoint of fracture mechanics the importance of this result lies in the fact that in analyzing the components involving functionally graded materials one can use the existing crack tip finite element modeling developed for ordinary square root singularities and apply the energy balance based theories of conventional fracture mechanics.
Author : C. Petit
Publisher : RILEM Publications
ISBN 13 : 9782912143471
Total Pages : 748 pages
Book Rating : 4.1/5 (434 download)
Download or read book PRO 37: 5th International RILEM Conference on Cracking in Pavements – Mitigation, Risk Assessment and Prevention written by C. Petit and published by RILEM Publications. This book was released on 2004 with total page 748 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Isaac E Elishakoff
Publisher : World Scientific
ISBN 13 : 9814656607
Total Pages : 340 pages
Book Rating : 4.8/5 (146 download)
Download or read book Mechanics Of Functionally Graded Material Structures written by Isaac E Elishakoff and published by World Scientific. This book was released on 2015-10-29 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mechanics of Functionally Graded Material Structures is an authoritative and fresh look at various functionally graded materials, customizing them with various structures. The book is devoted to tailoring material properties to the needed structural performance. The authors pair materials with the appropriate structures based upon their purpose and use.Material grading of structures depending upon thickness, axial and polar directions are discussed. Three dimensional analysis of rectangular plates made of functional graded materials and vibrational tailoring of inhomogeneous beams and circular plates are both covered in great detail. The authors derive novel closed form solutions that can serve as benchmarks that numerical solutions can be compared to. These are published for the first time in the literature. This is a unique book that gives the first exposition of the effects of various grading mechanisms on the structural behavior as well as taking into account vibrations and buckling.
Author : Blaise Bourdin
Publisher : Springer Science & Business Media
ISBN 13 : 1402063954
Total Pages : 173 pages
Book Rating : 4.4/5 (2 download)
Download or read book The Variational Approach to Fracture written by Blaise Bourdin and published by Springer Science & Business Media. This book was released on 2008-04-19 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presenting original results from both theoretical and numerical viewpoints, this text offers a detailed discussion of the variational approach to brittle fracture. This approach views crack growth as the result of a competition between bulk and surface energy, treating crack evolution from its initiation all the way to the failure of a sample. The authors model crack initiation, crack path, and crack extension for arbitrary geometries and loads.
Author : Jan G.M. van Mier
Publisher : CRC Press
ISBN 13 : 135144722X
Total Pages : 468 pages
Book Rating : 4.3/5 (514 download)
Download or read book Fracture Processes of Concrete written by Jan G.M. van Mier and published by CRC Press. This book was released on 2017-07-14 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: Despite tremendous advances made in fracture mechanics of concrete in recent years, very little information has been available on the nature of fracture processes and on reliable test methods for determining parameters for the different models. Moreover, most texts on this topic discuss numerical modeling but fail to consider experimentation. This book fills these gaps and synthesizes progress in the field in a simple, straightforward manner geared to practical applications.
Author : Tian Xiaohong
Publisher : Walter de Gruyter GmbH & Co KG
ISBN 13 : 3110297973
Total Pages : 317 pages
Book Rating : 4.1/5 (12 download)
Download or read book Fracture Mechanics in Layered and Graded Solids written by Tian Xiaohong and published by Walter de Gruyter GmbH & Co KG. This book was released on 2014-06-23 with total page 317 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mechanical responses of solid materials are governed by their material properties. The solutions for estimating and predicting the mechanical responses are extremely difficult, in particular for non-homogeneous materials. Among these, there is a special type of materials whose properties are variable only along one direction, defined as graded materials or functionally graded materials (FGMs). Examples are plant stems and bones. Artificial graded materials are widely used in mechanical engineering, chemical engineering, biological engineering, and electronic engineering. This work covers and develops boundary element methods (BEM) to investigate the properties of realistic graded materials. It is a must have for practitioners and researchers in materials science, both academic and in industry. Covers analysis of properties of graded materials. Presents solutions based methods for analysis of fracture mechanics. Presents two types of boundary element methods for layered isotropic materials and transversely isotropic materials. Written by two authors with extensive international experience in academic and private research and engineering.
Author : O. van der Biest
Publisher :
ISBN 13 :
Total Pages : 824 pages
Book Rating : 4.3/5 (91 download)
Download or read book Functionally Graded Materials VIII written by O. van der Biest and published by . This book was released on 2005 with total page 824 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multifunctional materials are composite systems that exhibit useful responses to electrical, optical, magnetic and/or mechanical stimuli. They allow the compact and economic integration of two or more functions; which can be mechanical, biological, acoustic, thermal, electrical, magnetic, optical or sensory in nature. Functionally graded materials (FGM) are also multi-functional materials, which exhibit spatial variations in composition and/or microstructure; created with the specific purpose of controlling variations in thermal, structural or functional properties. In spite of large differences in the type and size scale of the materials considered, many common features exist, thus furnishing a rationale for grouping these materials together in one book. The topics covered include: structural applications, materials for information technology, energy conversion materials and devices, biomedical materials and their applications, multifunctional materials for sensors and actuators, eco-materials, thin films and coatings, modeling and simulations, testing and characterization, processing of materials.Overall, the book provides an excellent overview of the latest scientific and technological results in the field of FGMs, Multi-FGMs and related fields.
Author : Chin-Hang Sam
Publisher :
ISBN 13 :
Total Pages : 272 pages
Book Rating : 4.E/5 ( download)
Download or read book Fracture Simulations of Brittle Materials Using Cohesive Elements written by Chin-Hang Sam and published by . This book was released on 2003 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Christian Miehe
Publisher : Springer Science & Business Media
ISBN 13 : 9401702977
Total Pages : 487 pages
Book Rating : 4.4/5 (17 download)
Download or read book IUTAM Symposium on Computational Mechanics of Solid Materials at Large Strains written by Christian Miehe and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 487 pages. Available in PDF, EPUB and Kindle. Book excerpt: The steady increase in computational power induces an equally steady increase in the complexity of the engineering models and associated computer codes. This particularly affects the modeling of the mechanical response of materials. Material behavior is nowadays modeled in the strongly nonlinear range by tak ing into account finite strains, complex hysteresis effects, fracture phenomena and multiscale features. Progress in this field is of fundamental importance for many engineering disciplines, especially those concerned with material testing, safety, reliability and serviceability analyses of engineering structures. In recent years many important achievements have been made in the field of the theoretical formulation, the mathematical analysis and the numerical im plementation of deformation processes in solids. Computational methods and simulation techniques today play a central role in advancing the understanding of complex material behavior. Research in the field of "ComputationalMechan ics of Materials" is concerned with the development of mathematical models and numerical solution techniques for the simulation of material response. It is a very broad interdisciplinary field of science with inputs from traditional fields such as Applied Mechanics, Applied Mathematics, Materials Science, Solid State Physics and Information Technology. The intention of the IUTAM Symposium "Computational Mechanics of Solid Materials at Large Strains", held at the University of Stuttgart, Germany, from August 20-24, 200I, was to give a state of the art and a survey about recent developments in this field and to create perspectives for future research trends.
Author : Chin-Teh Sun
Publisher : Academic Press
ISBN 13 : 0123850010
Total Pages : 337 pages
Book Rating : 4.1/5 (238 download)
Download or read book Fracture Mechanics written by Chin-Teh Sun and published by Academic Press. This book was released on 2011-10-14 with total page 337 pages. Available in PDF, EPUB and Kindle. Book excerpt: From a leading expert in fracture mechanics, this text provides new approaches and new applications to advance the understanding of crack formation and propagation.
Author : Ray Douglas Carpenter
Publisher :
ISBN 13 : 9781303151064
Total Pages : pages
Book Rating : 4.1/5 (51 download)
Download or read book Experimental Fracture Measurements of Functionally Graded Materials written by Ray Douglas Carpenter and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary objective of this research was to extend established fracture toughnesstesting methods to a new class of engineering materials known as functionally gradedmaterials (FGMs). Secondary goals were to compare experimental results to thosepredicted by finite element models and to provide fracture test results as feedback towardoptimizing processing parameters for the in-house synthesis of a MoSi2/SiC FGM.Preliminary experiments were performed on commercially pure (CP) Ti and uniformaxial tensile tests resulted in mechanical property data including yield strength, 268 MPa,ultimate tensile strength, 470 MPa and Young's modulus, 110 GPa. Results from 3-pointbending fracture experiments on CP Ti demonstrated rising R-curve behavior andexperimentally determined J[Q] fracture toughness values ranged between 153 N/mm and254 N/mm. Similar experimental protocols were used for fracture experiments on a 7-layered Ti/TiB FGM material obtained from Cercom in Vista, California. A noveltechnique for pre-cracking in reverse 4-point bending was developed for thisductile/brittle FGM material. Fracture test results exhibited rising R-curve behavior and estimated J[Q] fracture toughness values ranged from 0.49 N/mm to 2.63 N/mm. A 5-layered MoSi2/SiC FGM was synthesized using spark plasma sintering (SPS). Samples ofthis material were fracture tested and the results again exhibited a rising R-curve with K[IC] fracture toughness values ranging from 2.7 MPa-m1/2 to 6.0 MPa-m1/2. Finite Element Models predicted rising R-curve behavior for both of the FGM materials tested. Modelresults were in close agreement for the brittle MoSi2/SiC FGM. For the relatively moreductile Ti/TiB material, results were in close agreement at short crack lengths butdiverged at longer crack lengths because the models accounted for fracture tougheningmechanisms at the crack tip but not those acting in the crack wake.
Author : Erkan Oterkus
Publisher : Elsevier
ISBN 13 : 0128200693
Total Pages : 460 pages
Book Rating : 4.1/5 (282 download)
Download or read book Peridynamic Modeling, Numerical Techniques, and Applications written by Erkan Oterkus and published by Elsevier. This book was released on 2021-04-29 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides readers with an incisive look at cutting-edge peridynamic modeling methods, numerical techniques, their applications, and potential future directions for the field. It starts with an introductory chapter authored by Stewart Silling, who originally developed peridynamics. It then looks at new concepts in the field, with chapters covering dual-horizon peridynamics, peridynamics for axisymmetric analysis, beam and plate models in peridynamics, coupled peridynamics and XFEM, peridynamics for dynamic fracture modeling, and more. From there, it segues into coverage of cutting-edge applications of peridynamics, exploring its biological applications, modeling at the nanoscale, peridynamics for composites delamination and damage in ceramics, and more, concluding with a chapter on the application of artificial intelligence and machine learning in peridynamics. Covers modeling methods, numerical techniques, applications, and future directions for the field Discusses techniques such as dual-horizon peridynamics, damage modeling using the phase-field approach, and contact analysis of rigid and deformable bodies with refined non-ordinary state-based peridynamics Looks at a range of different peridynamic applications such as ice modeling, fiber-reinforced composite modeling, modeling at nanoscale, and more
Author : Zdenek P. Bazant
Publisher : Routledge
ISBN 13 : 1351447297
Total Pages : 640 pages
Book Rating : 4.3/5 (514 download)
Download or read book Fracture and Size Effect in Concrete and Other Quasibrittle Materials written by Zdenek P. Bazant and published by Routledge. This book was released on 2019-03-04 with total page 640 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fracture and Size Effect in Concrete and Other Quasibrittle Materials is the first in-depth text on the application of fracture mechanics to the analysis of failure in concrete structures. The book synthesizes a vast number of recent research results in the literature to provide a comprehensive treatment of the topic that does not give merely the facts - it provides true understanding. The many recent results on quasibrittle fracture and size effect, which were scattered throughout many periodicals, are compiled here in a single volume. This book presents a well-rounded discussion of the theory of size effect and scaling of failure loads in structures. The size effect, which is the most important practical manifestation of fracture behavior, has become a hot topic. It has gained prominence in current research on concrete and quasibrittle materials. The treatment of every subject in Fracture and Size Effect in Concrete and Other Quasibrittle Materials proceeds from simple to complex, from specialized to general, and is as concise as possible using the simplest level of mathematics necessary to treat the subject clearly and accurately. Whether you are an engineering student or a practicing engineer, this book provides you with a clear presentation, including full derivations and examples, from which you can gain real understanding of fracture and size effect in concrete and other quasibrittle materials.
