January 20, 2021

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Brittle Fracture and Damage of Brittle Materials and Composites

Brittle Fracture and Damage of Brittle Materials and Composites
Author : Jacques Lamon
Publisher : Elsevier
Release Date : 2016-03-16
Category : Technology & Engineering
Total pages :296
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Flaws are the principal source of fracture in many materials, whether brittle or ductile, whether nearly homogeneous or composite. They are introduced during either fabrication or surface preparation or during exposure to aggressive environments (e. g. oxidation, shocks). The critical flaws act as stress concentrators and initiate cracks that propagate instantaneously to failure in the absence of crack arrest phenomena as encountered in brittle materials. This book explores those brittle materials susceptible to crack arrest and the flaws which initiate crack induced damage. A detailed description of microstructural features covering numerous brittle materials, including ceramics, glass, concrete, metals, polymers and ceramic fibers to help you develop your knowledge of material fracture. Brittle Failure and Damage of Brittle Materials and Composites outlines the technological progress in this field and the need for reliable systems with high performances to help you advance the development of new structural materials, creating advantages of low density, high resistance to elevated temperatures and aggressive environments, and good mechanical properties. The effects of flaw populations on fracture strength The main statistical-probabilistic approaches to brittle fracture The use of these methods for predictions of failure and effects induced by flaw populations The application of these methods to component design The methods of estimation of statistical parameters that define flaw strength distributions The extension of these approaches to damage and failure of continuous fiber reinforced ceramic matrix composites

Brittle Matrix Composites

Brittle Matrix Composites
Author : Vaclav veselý,Petr Frantík,Tomáš Pail,Zbyněk keršner
Publisher : Elsevier Inc. Chapters
Release Date : 2012-11-12
Category : Technology & Engineering
Total pages :350
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The paper is focused on an estimation of the extent of the fracture process zone and the zone of cumulative damage evolving during tensile failure of structures made of quasi-brittle materials, e.g. cementitious composites. The zone is determined via a developed (semi-)analytical method based on a combination of multi-parameter linear elastic fracture mechanics, cohesive crack models and plasticity theory. Results of the method are verified by numerical simulations of three-point bending of notched beams using an academic computational code based on a discrete spring network (lattice-particle) model and programs based on continuum modelling (finite elements), both with implementation of the cohesive zone approach. Three materials differing in cohesive behaviour are considered in the study; apart from the classical quasi-brittle softening material also a quasi-ductile and a strain hardening ones are taken into account. Used simulation tools provide sound results, particularly in the case of the softening material. Moreover, significant potential of the developed modelling techniques is presented.

Fracture and Fatigue

Fracture and Fatigue
Author : Lawrence J. Broutman
Publisher : Elsevier
Release Date : 2016-06-15
Category : Technology & Engineering
Total pages :484
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Composite Materials, Volume 5: Fracture and Fatigue covers the concepts, theories, and experiments on fracture and fatigue behavior of composite materials. The book discusses the fracture of particulate composites, including metal, polymer, and ceramic matrices; relates micromechanics effects to composite strength; and summarizes the various theories relating constituent properties and microstructure to fracture. The text also describes differing theories regarding the strength and fracture of composites; and the theory and experiment relating to time-dependent fracture covering both long-term as well as dynamic fracture. The fatigue of both polymer- and metal-matrix composites and the factors influencing the toughness of both brittle and ductile matrix composites are also considered. Design engineers, materials scientist, materials engineers, and metallurgists will find the book useful.

Advances in Fracture and Damage Mechanics IX

Advances in Fracture and Damage Mechanics IX
Author : Akihide Saimoto,Ferri M.H.Aliabadi
Publisher : Trans Tech Publications Ltd
Release Date : 2010-11-11
Category : Technology & Engineering
Total pages :1010
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Volume is indexed by Thomson Reuters CPCI-S (WoS). This special collection covers the latest theoretical, computational and experimental research on fracture and damage mechanics, as well as on structural integrity and durability.

Multiscale Modelling of Damage and Fracture Processes in Composite Materials

Multiscale Modelling of Damage and Fracture Processes in Composite Materials
Author : Tomasz Sadowski
Publisher : Springer Science & Business Media
Release Date : 2007-03-23
Category : Technology & Engineering
Total pages :309
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This book explores damage growth and fracture processes in cementitious, ceramic, polymer and metal matrix composites, integrating properties like stiffness and strength with observation at below macroscopic scale. Advances in multiscale modelling and analysis pertain directly to materials which either have a range of relevant microstructural scales, like metals, or do not have a well-defined microstructure, like cementitious or ceramic composites.

Fracture and Damage in Quasibrittle Structures

Fracture and Damage in Quasibrittle Structures
Author : Z.P. Bazant,Z. Bittnar,M. Jirasek,J. Mazars
Publisher : CRC Press
Release Date : 2004-01-14
Category : Architecture
Total pages :646
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Understanding of failure of quasibrittle materials is of paramount importance in many engineering fields. This subject has become a broad and important field of considerable mathematical complexity, with many competing models and unsolved problems. Attention in this volume focuses on concrete, rock, masonry, toughened ceramics, ice and other quasibrittle materials characterized by the development of large zones of cracking or other microstructural damage, and its localization into major fractures.

Damage and Fracture of Composite Materials and Structures

Damage and Fracture of Composite Materials and Structures
Author : Mohd Nasir Tamin
Publisher : Springer Science & Business Media
Release Date : 2012-01-05
Category : Technology & Engineering
Total pages :244
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This monograph presents recent research findings on fracture properties and behavior of the composites, and their damage and cracking process under both quasi-static and impact loading conditions. Theoretical treatment, experimental investigation and numerical simulation aspects of the mechanics of composites, including sandwich structures are included.

Toughening Mechanisms in Quasi-Brittle Materials

Toughening Mechanisms in Quasi-Brittle Materials
Author : S.P. Shah
Publisher : Springer Science & Business Media
Release Date : 2012-12-06
Category : Science
Total pages :612
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A variety of ceramic materials has been recently shown to exhibit nonlinear stress strain behavior. These materials include transformation-toughened zirconia which undergoes a stress-induced crystallographic transformation in the vicinity of a propagating crack, microcracking ceramics, and ceramic-fiber reinforced ceramic matrices. Since many of these materials are under consideration for structural applications, understanding fracture in these quasi-brittle materials is essential. Portland cement concrete is a relatively brittle material. As a result mechanical behavior of concrete, conventionally reinforced concrete, prestressed concrete and fiber reinforced concrete is critically influenced by crack propagation. Crack propagation in concrete is characterized by a fracture process zone, microcracking, and aggregate bridging. Such phenomena give concrete toughening mechanisms, and as a result, the macroscopic response of concrete can be characterized as that of a quasi-brittle material. To design super high performance cement composites, it is essential to understand the complex fracture processes in concrete. A wide range of concern in design involves fracture in rock masses and rock structures. For example, prediction of the extension or initiation of fracture is important in: 1) the design of caverns (such as underground nuclear waste isolation) subjected to earthquake shaking or explosions, 2) the production of geothermal and petroleum energy, and 3) predicting and monitoring earthquakes. Depending upon the grain size and mineralogical composition, rock may also exhibit characteristics of quasi-brittle materials.

Damage Tolerant Hierarchical Composite Structures

Damage Tolerant Hierarchical Composite Structures
Author : Robert Edward Malkin
Publisher : Unknown
Release Date : 2011
Category :
Total pages :129
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The use of fibre reinforced polymers is rapidly increasing in a range of applications, from aviation to sporting goods. While the outstanding material properties offered by modern composites make them widely applicable they often suffer from brittle, catastrophic failure. Their inherent brittleness limits their application for safety critical applications without large safety margins. This thesis sets out to introduce design principles that introduce a degree of 'pseudo- ductile' failure behaviour to advanced fibre composites. Much of the inspiration for the work comes from looking at the failure processes of natural hierarchical materials. Many of these materials are able to sustain large amounts of damage at different length scales without catastrophic failure, with many of them being essentially ceramics. Nacre, a relatively simple discontinuous laminated material, served as a major inspiration. Three main strategies were employed to reduce the effects of brittle fracture. Ply terminations were used to selectively weaken a laminate allowing one large fracture to be replaced with a number of smaller ones. Thereby giving indication of the laminates failure and significantly increasing the strain to failure over a traditional laminate. Ply perforations, where portions of a ply are cut, were used to weaken a laminate allowing the location of the fracture to be controlled. The third method tailored interlaminar fracture toughness allowing for steady crack propagation where traditional laminates would suffer unstable crack growth. The work introduces three distinct and highly expandable methodologies capable of reducing the limitations of modern composites.

Proceedings of the Tenth International Conference on Composite Materials: Fatigue and fracture

Proceedings of the Tenth International Conference on Composite Materials: Fatigue and fracture
Author : Anoush Poursartip,Ken Street
Publisher : Woodhead Publishing
Release Date : 1995
Category : Technology & Engineering
Total pages :800
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Volume 1: Fatigue and Fracture

Computational Methods for Fracture

Computational Methods for Fracture
Author : Timon Rabczuk
Publisher : MDPI
Release Date : 2019-10-28
Category : Technology & Engineering
Total pages :404
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This book offers a collection of 17 scientific papers about the computational modeling of fracture. Some of the manuscripts propose new computational methods and/or how to improve existing cutting edge methods for fracture. These contributions can be classified into two categories: 1. Methods which treat the crack as strong discontinuity such as peridynamics, scaled boundary elements or specific versions of the smoothed finite element methods applied to fracture and 2. Continuous approaches to fracture based on, for instance, phase field models or continuum damage mechanics. On the other hand, the book also offers a wide range of applications where state-of-the-art techniques are employed to solve challenging engineering problems such as fractures in rock, glass, concrete. Also, larger systems such as fracture in subway stations due to fire, arch dams, or concrete decks are studied.

The Theory of Materials Failure

The Theory of Materials Failure
Author : Richard M. Christensen
Publisher : OUP Oxford
Release Date : 2013-03-15
Category : Science
Total pages :296
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A complete and comprehensive theory of failure is developed for homogeneous and isotropic materials. The full range of materials types are covered from very ductile metals to extremely brittle glasses and minerals. Two failure properties suffice to predict the general failure conditions under all states of stress. With this foundation to build upon, many other aspects of failure are also treated, such as extensions to anisotropic fiber composites, cumulative damage, creep and fatigue, and microscale and nanoscale approaches to failure.

Mechanical Behaviour of Materials

Mechanical Behaviour of Materials
Author : Dominique François,André Pineau,André Zaoui
Publisher : Springer Science & Business Media
Release Date : 2012-12-24
Category : Technology & Engineering
Total pages :666
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Designing new structural materials, extending lifetimes and guarding against fracture in service are among the preoccupations of engineers, and to deal with these they need to have command of the mechanics of material behaviour. This ought to reflect in the training of students. In this respect, the first volume of this work deals with elastic, elastoplastic, elastoviscoplastic and viscoelastic behaviours; this second volume continues with fracture mechanics and damage, and with contact mechanics, friction and wear. As in Volume I, the treatment links the active mechanisms on the microscopic scale and the laws of macroscopic behaviour. Chapter I is an introduction to the various damage phenomena. Chapter II gives the essential of fracture mechanics. Chapter III is devoted to brittle fracture, chapter IV to ductile fracture and chapter V to the brittle-ductile transition. Chapter VI is a survey of fatigue damage. Chapter VII is devoted to hydrogen embrittlement and to environment assisted cracking, chapter VIII to creep damage. Chapter IX gives results of contact mechanics and a description of friction and wear mechanisms. Finally, chapter X treats damage in non metallic materials: ceramics, glass, concrete, polymers, wood and composites. The volume includes many explanatory diagrams and illustrations. A third volume will include exercises allowing deeper understanding of the subjects treated in the first two volumes.

Damage Mechanics in Engineering Materials

Damage Mechanics in Engineering Materials
Author : Jiann-Wen Woody Ju,J.-L. Chaboche,George Z. Voyiadjis
Publisher : Elsevier
Release Date : 1998-03-04
Category : Technology & Engineering
Total pages :545
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This book contains thirty peer-reviewed papers that are based on the presentations made at the symposium on "Damage Mechanics in Engineering Materials" on the occasion of the Joint ASME/ASCE/SES Mechanics Conference (McNU97), held in Evanston, Illinois, June 28-July 2, 1997. The key area of discussion was on the constitutive modeling of damage mechanics in engineering materials encompassing the following topics: macromechanics/micromechanical constitutive modeling, experimental procedures, numerical modeling, inelastic behavior, interfaces, damage, fracture, failure, computational methods. The book is divided into six parts: Study of damage mechanics. Localization and damage. Damage in brittle materials. Damage in metals and metal matrix composites. Computational aspects of damage models. Damage in polymers and elastomers.

Fracture of Brittle Disordered Materials: Concrete, Rock and Ceramics

Fracture of Brittle Disordered Materials: Concrete, Rock and Ceramics
Author : G. Baker,B.L. Karihaloo
Publisher : CRC Press
Release Date : 2004-01-14
Category : Architecture
Total pages :648
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This book derives from the invited IUTAM Symposium in September 1993. The contributions discuss recent advances in fracture mechanics studies of concrete, rock, ceramics and other brittle disordered materials at micro and structural levels. It draws together research and new applications in continuum, damage and fracture mechanics approaches.