Brittle Matrix Composites 9

Brittle Matrix Composites 9
Author: A M Brandt,J Olek,I H Marshall
Publsiher: Elsevier
Total Pages: 600
Release: 2009-11-30
ISBN: 085709307X
Category: Technology & Engineering
Language: EN, FR, DE, ES & NL

Brittle Matrix Composites 9 Book Excerpt:

The subjects of the symposia are on composite materials with matrices behaving as brittle in normal or special conditions. Brittle matrix composites are applied in various domains (civil engineering, mechanical equipment and machinery, vehicles, etc.) and in the last decades their importance is increasing together with their variety. Papers include: aggregate-binder composites (concretes, fibre concretes, rocks); sintered materials (ceramics); high strength composites with brittle matrices. In principle, the general problems of structures made of composite materials are not included in the papers. Various approaches to the material engineering problems are presented in the papers.

Brittle Matrix Composites 10

Brittle Matrix Composites 10
Author: A M Brandt,M A Glinicki,J Olek,C K Y Leung
Publsiher: Elsevier
Total Pages: 350
Release: 2012-11-12
ISBN: 0857099892
Category: Technology & Engineering
Language: EN, FR, DE, ES & NL

Brittle Matrix Composites 10 Book Excerpt:

The subjects of the symposia are on composite materials behaving as brittle, normal and special conditions of exploitation. Brittle matrix composites are applied in various domains and the series of symposia are closely related to their applications in civil engineering. In the last decades their importance is increasing along with their variety and the use of most advanced methods of testing. Papers include concretes, fibre concretes and ceramics, particularly their composition, microstructure and fracture processes. Various new and advanced engineering problems are presented in the papers.

Brittle Matrix Composites

Brittle Matrix Composites
Author: Tomasz Zdeb,Izabela Hager,Jacek Śliwiński
Publsiher: Elsevier Inc. Chapters
Total Pages: 350
Release: 2012-11-12
ISBN: 0128090227
Category: Technology & Engineering
Language: EN, FR, DE, ES & NL

Brittle Matrix Composites Book Excerpt:

This paper presents the results from an experimental study on the behaviour of Reactive Powder Concretes (RPC) at high temperature. The exposure to high temperature is related to the potential risk of fire. A previous study has shown that RPC is prone to spalling in such circumstances and for this reason polypropylene fibres were used in RPC concrete to prevent this occurring. The addition of PP fibres reduces the risk of spalling due to an increase in permeability, however it reduces the initial compressive strength of the RPC material by approx. 20 %. The results demonstrate that the strength of concrete along with the modulus of elasticity decrease with increasing temperature. Two experimental concretes were prepared and prismatic specimens, 40x40x80mm in size, were cast from each mixture and tested in compression after being submitted to the high temperature. The relative value of compressive strength course for both types of concrete shows a similar development. The change in modulus of elasticity with temperature was determined from the stress-strain relationship and compared with the dynamic modulus of elasticity determined with the use of a Pundit plus ultrasonic pulse velocity defectoscope.

Brittle Matrix Composites

Brittle Matrix Composites
Author: Agnieszka J Klemm,Paul Baker,Karol Sikora
Publsiher: Elsevier Inc. Chapters
Total Pages: 350
Release: 2012-11-12
ISBN: 012809012X
Category: Technology & Engineering
Language: EN, FR, DE, ES & NL

Brittle Matrix Composites Book Excerpt:

Construction industry like any other area of economic and social life undergoes continuous alterations and improvements in order to successfully comply with the requirements of sustainable development. Consumers demand more durable, less labour and service intensive materials at a competitive price. To meet these expectations numerous new composite materials have been developed over the last couple of decades, including cementitious materials modified by superabsorbent polymers (SAP). The paper presents part of the larger research project on the performance of cementitious mortars containing two types of superabsorbent polymers (SAP) as the internal curing agent.SAP A is a copolymer of acrylamide and acrylic acid and SAP B is a polymer based on acrylic acid. Research work presented in this paper involves macro and micro scale characterisation of polymer modified mortars. The microstructural features were studied with application of the Mercury Intrusion Porosimetry and the Scanning Electron Microscopy techniques. Analyses of pore size distribution in mortars of different ages are accompanied by the analyses of strength and autogenous shrinkage development as well as early density changes in immature mortars by the X-ray absorption method. The investigations confirmed the positive effect of SAP A on the reduction of autogenous shrinkage and microcrack propagation. Limited absorption/desorption abilities of SAP B cannot reassure continuous supply of water and hence the performance of SAP B mortars was comparable with the reference samples. The effect of both SAPs on strength development proved to be negligible.

Brittle Matrix Composites

Brittle Matrix Composites
Author: Piotr Woyciechowski
Publsiher: Elsevier Inc. Chapters
Total Pages: 350
Release: 2012-11-12
ISBN: 0128090200
Category: Technology & Engineering
Language: EN, FR, DE, ES & NL

Brittle Matrix Composites Book Excerpt:

The aim of the paper was to show the important aspect of treating waste additives as the main way to achieve sustainable development in the concrete technology. The author considers the effects of minimizing the use of cement replacing it with waste additives, on the concrete durability. The depth of carbonation is adopted as the possible measure of durability. Results of accelerated and natural tests of carbonation progress for concrete with normal and fluidal fly ash, silica fume and blast furnace slag are shown, influence on carbonation of the additive type, its content in concrete and its role (cement or aggregate substitution) is discussed. The important impact of early water curing on depth of carbonation is stated also.

Brittle Matrix Composites

Brittle Matrix Composites
Author: Tatiana V. Lyashenko,Svetlana A. Kryukovskaya
Publsiher: Elsevier Inc. Chapters
Total Pages: 350
Release: 2012-11-12
ISBN: 012809026X
Category: Technology & Engineering
Language: EN, FR, DE, ES & NL

Brittle Matrix Composites Book Excerpt:

Fibre reinforced polymer-cement compositions for self-levelling flooring are studied. The individual and combined effects of dispersible polymer powder with properties of binder and superplasticiser, of various methylcelluloses, and of polypropylene fibre on effective viscosity of the mix and mechanical properties of the hardened mortar are evaluated and analysed. Used for analysis are multifactor experimental-statistical models built on the data obtained for 18 mixes (of the same workability) in the designed experiment and describing the fields of rheological model parameters, of strength, and other criteria in composition coordinates. The models have made it possible to simulate material behaviour in computational experiments, to reveal and evaluate the correlations of the properties for different technological conditions, to find individual and compromise optima.

Brittle Matrix Composites

Brittle Matrix Composites
Author: Conrado de Souza Rodrigues,Mariana Arruda Pereira,Stefan Chaves Figueiredo,Khosrow Ghavami,Piet Stroeven
Publsiher: Elsevier Inc. Chapters
Total Pages: 350
Release: 2012-11-12
ISBN: 0128090464
Category: Technology & Engineering
Language: EN, FR, DE, ES & NL

Brittle Matrix Composites Book Excerpt:

More recent investigations on cellulose-cement composites predominantly deal with durability aspects, whereby use is made of accelerated weathering cycles as the main approach to establishing the deterioration mechanisms and the efficiency of treatment methods. As moisture transport is the main mechanism that leads to the deterioration of those composites, accelerated ageing tests are commonly based on wet-drying cycles with a combination of temperature and relative humidity (R.H.) variations. Both variables result in dimensional changes of the samples, leading to interfacial abrasion and the progressive decrease in the composites’ toughness and strength. To investigate the effects of each of these variables, the weathering tests were performed in an environmental chamber considering each variable separately in two ageing cycles. In the first one the composites were submitted to saturation and drying at a constant 25°C, by means of a relative humidity change in the chamber. For the second ageing cycle a temperature variation between 20°C and 60°C at a constant R.H. of 50% was applied. The effects of each ageing cycle on the cellulose-cement composites were assessed on the basis of physical and mechanical parameters, determined after 0, 5, 20 and 50 cycles. Moreover, part of the samples was provided with electrical strain gauges, which rendered possible to determine the composites’ expansion-shrinkage behaviour during the temperature and R.H. variations. As the main treatment approach, the partial replacement of cement (OPC) by rice husk ash (RHA) was investigated. It was found that RHA improved the strength and durability performance of the composites, although the increased porosity resulted from the 30% replacement rate of OPC and carbonate filler by RHA.

Brittle Matrix Composites

Brittle Matrix Composites
Author: Tomasz Ponikiewski,Jacek Gołaszewski
Publsiher: Elsevier Inc. Chapters
Total Pages: 350
Release: 2012-11-12
ISBN: 0128090278
Category: Technology & Engineering
Language: EN, FR, DE, ES & NL

Brittle Matrix Composites Book Excerpt:

The paper presents results of tests on self-compacting mixtures with the addition of steel fibres (Steel Fibre Reinforced Self-Compacting Concrete). Four types of steel fibres at 3 levels of the volume ratio are considered. The results include studies on samples belonging to classes of slump flow SF, classes of viscosity T500, and rheological tests. The studies were based on application of two rheometers for rheological properties of concrete mixtures - BT2 Rheometer and Viskomat XL. Additionally, a study of compressive strength fcm,28 and flexural strength f was carried out on concrete SFRSCC. These studies have confirmed the possibility of using steel fibres in concrete SCC while maintaining the assumed technological parameters for concrete mixtures and, above all, their workability.

Brittle Matrix Composites

Brittle Matrix Composites
Author: Dominik Logoń
Publsiher: Elsevier Inc. Chapters
Total Pages: 350
Release: 2012-11-12
ISBN: 0128090332
Category: Technology & Engineering
Language: EN, FR, DE, ES & NL

Brittle Matrix Composites Book Excerpt:

The main motivation for this work was the attempt to limit the rapid destruction of brittle high performance concrete UPC and, in consequence, to obtain SRCC (safe rope effect cement composite). In the high performance fiber reinforced cement composites HPFRC deflection and flexural strength are increased. The rope effect in HPFRC results in a highly deflected damaged specimen with multicracking effect and with post-peak load at bending exceeding that corresponding to the first crack, which enables to obtain cement composite with the ability to absorb additional energy after the appearance of the macrocrack. The SRCC paste and mortar were presented in the previous paper. This paper shows different effects of the strengthening of cement concrete with dispersed synthetic structural polypropylene fibers 19 and 54mm long. The possibility to control multicracking and the crack propagation process using the rope effect for SRCC composites, which eliminates the catastrophic process of the destruction of composite, was presented and a new possibility of the strengthening effects assessment was suggested.

Brittle Matrix Composites 7

Brittle Matrix Composites 7
Author: A M Brandt,V C Li,I H Marshall
Publsiher: Elsevier
Total Pages: 564
Release: 2003-10-01
ISBN: 085709310X
Category: Technology & Engineering
Language: EN, FR, DE, ES & NL

Brittle Matrix Composites 7 Book Excerpt:

The International Symposium in Brittle Matrix Composites October 13-15, 2003 covers a wide spectrum of topics including cement based composites, ceramic composites and brittle polymer matrix composites. In the papers various topics and issues are considered such as: analytical and numerical studies related to the design of composites, prediction of behaviour and verification of strength and stability, testing methods, manufacturing processes and repair, environmental effects and durability assessment. The present volume of 55 papers proves that there are still many problems in the field of brittle matrix composites deserving theoretical and experimental investigations and that new solutions to these problems are needed for practical application in civil engineering, industrial structures, machinery and other domains.

Brittle Matrix Composites

Brittle Matrix Composites
Author: Nghi L.B. Le,Piet Stroeven
Publsiher: Elsevier Inc. Chapters
Total Pages: 350
Release: 2012-11-12
ISBN: 0128090391
Category: Technology & Engineering
Language: EN, FR, DE, ES & NL

Brittle Matrix Composites Book Excerpt:

Portland cement (PC) production contributes by about 6% to global emissions of C02. Reduction of the PC content in the binder exerts therefore a direct positive effect on such emissions. Partial replacement of the Portland cement by pozzolanic mineral admixtures has been proven a possible option. The green character is even reinforced by making use of incinerated vegetable waste, such as rice husk ash (RHA). Moreover, as a result of the gap-grading effect on particle packing density with RHA as the fine component, high strength concrete can be achieved with RHA-blended cement. This has been published earlier, so the paper only briefly covers these aspects. Characteristics of the capillary pores developed in the hydrating binder have direct impact on the transport-based durability properties. However, assessment of such pore characteristics of the RHA-blended cement constitutes a complicated problem, especially in experimental approaches. This paper, therefore, presents a new economic approach to conduct such investigation on the realistically produced cementitious materials in virtual reality. The fresh packed state of the paste’s particles is simulated by a discrete element modeling (DEM) system, HADES. The hydration of a (blended) cement is simulated by a so-called ‘extended integrated particle kinetics model’ (XIPKM). Pore characteristics, such as topology, location distribution, degree of percolation and fraction of main channels in the pore network, are explored by a new modern approach named ‘double random multi-tree structuring’ (DraMuTS). The size distribution of throats that significantly limit the transport in the pore network system is derived from star volume measurements. Four examples of plain PC and of RHA-blended PC with two w/b ratios are presented. The expected positive effects on transport-based durability issues due to RHA-blending are discussed.

Life Prediction Methodology for Titanium Matrix Composites

Life Prediction Methodology for Titanium Matrix Composites
Author: W. Steven Johnson
Publsiher: ASTM International
Total Pages: 625
Release: 1996
ISBN: 0803120397
Category: Technology & Engineering
Language: EN, FR, DE, ES & NL

Life Prediction Methodology for Titanium Matrix Composites Book Excerpt:

Papers presented at the March 1994 symposium are organized into five sections that progress from basic understanding of mechanical damage mechanisms and environmental effects to life prediction methodology. Five papers discuss the interplay between interfacial strength, residual thermal stresses, an

Brittle Matrix Composites

Brittle Matrix Composites
Author: Anonim
Publsiher: Unknown
Total Pages: 728
Release: 1994
ISBN: 1928374650XXX
Category: Brittleness
Language: EN, FR, DE, ES & NL

Brittle Matrix Composites Book Excerpt:

Ceramic Matrix Composites

Ceramic Matrix Composites
Author: Narottam P. Bansal,Jacques Lamon
Publsiher: John Wiley & Sons
Total Pages: 712
Release: 2014-11-24
ISBN: 1118231163
Category: Technology & Engineering
Language: EN, FR, DE, ES & NL

Ceramic Matrix Composites Book Excerpt:

This book is a comprehensive source of information on various aspects of ceramic matrix composites (CMC). It covers ceramic and carbon fibers; the fiber-matrix interface; processing, properties and industrial applications of various CMC systems; architecture, mechanical behavior at room and elevated temperatures, environmental effects and protective coatings, foreign object damage, modeling, life prediction, integration and joining. Each chapter in the book is written by specialists and internationally renowned researchers in the field. This book will provide state-of-the-art information on different aspects of CMCs. The book will be directed to researchers working in industry, academia, and national laboratories with interest and professional competence on CMCs. The book will also be useful to senior year and graduate students pursuing degrees in ceramic science and engineering, materials science and engineering, aeronautical, mechanical, and civil or aerospace engineering. Presents recent advances, new approaches and discusses new issues in the field, such as foreign object damage, life predictions, multiscale modeling based on probabilistic approaches, etc. Caters to the increasing interest in the application of ceramic matrix composites (CMC) materials in areas as diverse as aerospace, transport, energy, nuclear, and environment. CMCs are considered ans enabling technology for advanced aeropropulsion, space propulsion, space power, aerospace vehicles, space structures, as well as nuclear and chemical industries. Offers detailed descriptions of ceramic and carbon fibers; fiber-matrix interface; processing, properties and industrial applications of various CMC systems; architecture, mechanical behavior at room and elevated temperatures, environmental effects and protective coatings, foreign object damage, modeling, life prediction, integration/joining.

Advances in Ceramic Matrix Composites

Advances in Ceramic Matrix Composites
Author: I M Low
Publsiher: Woodhead Publishing
Total Pages: 734
Release: 2014-02-14
ISBN: 0857098829
Category: Technology & Engineering
Language: EN, FR, DE, ES & NL

Advances in Ceramic Matrix Composites Book Excerpt:

Ceramic matrix composites (CMCs) have proven to be useful for a wide range of applications because of properties such as their light weight, toughness and temperature resistance. Advances in ceramic matrix composites summarises key advances and types of processing of CMCs. After an introductory chapter, the first part of the book reviews types and processing of CMCs, covering processing, properties and applications. Chapters discuss nanoceramic matric composites, silicon carbide-containing alumina nanocomposites and advances in manufacture by various infiltration techniques including heat treatments and spark plasma sintering. The second part of the book is dedicated to understanding the properties of CMCs with chapters on Finite Element Analysis, tribology and wear and self-healing CMCs. The final part of the book examines the applications of CMCs, including those in the structural engineering, nuclear and fusion energy, turbine, metal cutting and microelectronics industries. Advances in ceramic matrix composites is an essential text for researchers and engineers in the field of CMCs and industries such as aerospace and automotive engineering. Reviews types and processing of CMCs, covering processing, properties and applications

Intermetallic Matrix Composites

Intermetallic Matrix Composites
Author: Rahul Mitra
Publsiher: Elsevier
Total Pages: 486
Release: 2017-05-25
ISBN: 0857093576
Category: Technology & Engineering
Language: EN, FR, DE, ES & NL

Intermetallic Matrix Composites Book Excerpt:

Intermetallic Matrix Composites: Properties and Applications is a comprehensive guide that studies the types and properties of intermetallic matrix composites, including their processing techniques, characterization and the various testing methods associated with these composites. In addition, it presents modeling techniques, their strengthening mechanisms and the important area of failure and repair. Advanced /complex IMCs are then explained, such as Self-healing IMCs and laminated intermetallic composites. The book concludes by delving into the industries that use these materials, including the automotive industry. Reviews the latest research in intermetallic matrix composites Contains a focus on properties and applications Includes contributions from leading experts in the field

Advances in Ceramic Matrix Composites VII

Advances in Ceramic Matrix Composites VII
Author: Narottam P. Bansal,J. P. Singh,Hua-Tay Lin
Publsiher: John Wiley & Sons
Total Pages: 270
Release: 2012-03-28
ISBN: 1118380916
Category: Technology & Engineering
Language: EN, FR, DE, ES & NL

Advances in Ceramic Matrix Composites VII Book Excerpt:

This proceedings contains 18 papers from the Ceramic Matrix Composites symposium held during the 103rd Annual Meeting of The American Ceramic Society, April 22—25, 2001, in Indianapolis, Indiana. Chapters include Processing; Mechanical Properties; Corrosion and Environmental Effects; Characterization and Test Methods; Design of CMC Components; and Joining. 258 pages

Fracture Mechanics of Ceramics

Fracture Mechanics of Ceramics
Author: R.C. Bradt,D. Munz,M. Sakai,V.Ya. Shevchenko,K.W. White
Publsiher: Springer Science & Business Media
Total Pages: 530
Release: 2013-03-09
ISBN: 1475740190
Category: Technology & Engineering
Language: EN, FR, DE, ES & NL

Fracture Mechanics of Ceramics Book Excerpt:

This Volume 13 of the Fracture Mechanics of Ceramics series constitutes the th Proceedings of the 7 International Symposium on the fracture mechanics of ceramics held at the Presidium of the Russian Academy of Sciences, Moscow, Russia on July 20 to 22, 1999. The series started from the Proceedings of the 1 st Symposium at the Pennsylvania State University that has been held on 1973 (Vols. 1 and 2), followed by 1977 and 1981 Years meetings (Vols. 3 to 6) which were held at the Pennsylvania State University, too. Volumes 7 and 8 are from the 1985 Symposium which was held at the Virginia Polytechnic Institute and State University, Volumes 9 and 10 are from the 1991 Symposium at Japan Fine Ceramic Centre, Nagoya, and Volumes 11 and 12 are from the 1995 Symposium at Kernforschungszentrum, Karlsruhe. The theme of the Symposium was focused on the mechanical behaviour of advanced ceramics in terms of the cracks, particularly the crack-microstructure interaction, delayed failure, environmental effects in fracture. Special attention was paid on the novel methods in fracture mechanics testing, pre-standardisation and standartisation. The authors from 19 countries represented the current state of that field. The International Scientific Committee gratefully acknowledge the sponsoring provided by The Russian Academy of Sciences and, personally, Academician Yu.S.Osipov, President of RAS; The Ministry of Science and Technologies of the Russian Federation, Prof. G.Terestchenko; Russian Foundation for Basic Research, Academician I.Moiseev; Scientific Technical Center "Bacor", Dr. B.Krasnij; Gzhel Ltd., Prof.

Fracture Toughness Testing of Polymer Matrix Composites

Fracture Toughness Testing of Polymer Matrix Composites
Author: Joseph E. Grady
Publsiher: Unknown
Total Pages: 39
Release: 1992
ISBN: 1928374650XXX
Category: Composite materials
Language: EN, FR, DE, ES & NL

Fracture Toughness Testing of Polymer Matrix Composites Book Excerpt:

Titanium Matrix Composites

Titanium Matrix Composites
Author: Shankar Mall,Ted Nichols
Publsiher: CRC Press
Total Pages: 468
Release: 2020-01-29
ISBN: 1000725472
Category: Technology & Engineering
Language: EN, FR, DE, ES & NL

Titanium Matrix Composites Book Excerpt:

A review and summary of advancements related to mechanical behavior and related mechanics issues of titanium matrix composites (TMCs), a class of high-temperature materials useful in the propulsion and airframe components in advanced aerospace systems. After an introduction to TMCs, different authors review and summarise the advancements related to mechanical behavior and related mechanics issues of TMCs.