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Books > Professional & Technical > Mechanical engineering & materials > Materials science > Testing of materials > General

Quantitative Infrared Spectroscopy for Understanding of a Condensed Matter (Hardcover, 1st ed. 2017): Takeshi Hasegawa Quantitative Infrared Spectroscopy for Understanding of a Condensed Matter (Hardcover, 1st ed. 2017)
Takeshi Hasegawa
R3,919 Discovery Miles 39 190 Ships in 12 - 17 working days

This book is intended to provide a course of infrared spectroscopy for quantitative analysis, covering both bulk matter and surface/interface analyses. Although the technology of Fourier transform infrared (FT-IR) spectroscopy was established many years ago, the full potential of infrared spectroscopy has not been properly recognized, and its intrinsic potential is still put aside. FT-IR has outstandingly useful characteristics, however, represented by the high sensitivity for monolayer analysis, highly reliable quantitativity, and reproducibility, which are quite suitable for surface and interface analysis. Because infrared spectroscopy provides rich chemical information-for example, hydrogen bonding, molecular conformation, orientation, aggregation, and crystallinity-FT-IR should be the first choice of chemical analysis in a laboratory. In this book, various analytical techniques and basic knowledge of infrared spectroscopy are described in a uniform manner. In particular, techniques for quantitative understanding are particularly focused for the reader's convenience.

Improved Performance of Materials - Design and Experimental Approaches (Hardcover, 1st ed. 2018): Andreas Oechsner, Holm... Improved Performance of Materials - Design and Experimental Approaches (Hardcover, 1st ed. 2018)
Andreas Oechsner, Holm Altenbach
R2,841 Discovery Miles 28 410 Ships in 10 - 15 working days

This book offers a snapshot of recent developments in improving the properties and performance of engineering materials and structures. It discusses modeling properties related to classical mechanical, thermal, electrical and optical fields as well as those related to surface-specific quantities (e.g. roughness, wear and modifications due to surface coatings). The material types presented range from classical metals and synthetic materials to composites. Competitiveness due to cost efficiency (e.g. lighter structures and the corresponding fuel savings for transportation systems) and sustainability (e.g. recyclability or reusability) are the driving factors for engineering developments. The outcomes of these efforts are difficult to be accurately monitored due to the ongoing evaluation cycles.

Nonlinear Ultrasonic and Vibro-Acoustical Techniques for Nondestructive Evaluation (Hardcover, 1st ed. 2019): Tribikram Kundu Nonlinear Ultrasonic and Vibro-Acoustical Techniques for Nondestructive Evaluation (Hardcover, 1st ed. 2019)
Tribikram Kundu
R7,518 Discovery Miles 75 180 Ships in 10 - 15 working days

This multi-contributed volume provides a practical, applications-focused introduction to nonlinear acoustical techniques for nondestructive evaluation. Compared to linear techniques, nonlinear acoustical/ultrasonic techniques are much more sensitive to micro-cracks and other types of small distributed damages. Most materials and structures exhibit nonlinear behavior due to the formation of dislocation and micro-cracks from fatigue or other types of repetitive loadings well before detectable macro-cracks are formed. Nondestructive evaluation (NDE) tools that have been developed based on nonlinear acoustical techniques are capable of providing early warnings about the possibility of structural failure before detectable macro-cracks are formed. This book presents the full range of nonlinear acoustical techniques used today for NDE. The expert chapters cover both theoretical and experimental aspects, but always with an eye towards applications. Unlike other titles currently available, which treat nonlinearity as a physics problem and focus on different analytical derivations, the present volume emphasizes NDE applications over detailed analytical derivations. The introductory chapter presents the fundamentals in a manner accessible to anyone with an undergraduate degree in Engineering or Physics and equips the reader with all of the necessary background to understand the remaining chapters. This self-contained volume will be a valuable reference to graduate students through practising researchers in Engineering, Materials Science, and Physics. Represents the first book on nonlinear acoustical techniques for NDE applications Emphasizes applications of nonlinear acoustical techniques Presents the fundamental physics and mathematics behind nonlinear acoustical phenomenon in a simple, easily understood manner Covers a variety of popular NDE techniques based on nonlinear acoustics in a single volume

Asymptotical Mechanics of Composites - Modelling Composites without FEM (Hardcover, 1st ed. 2018): Igor V. Andrianov, Jan... Asymptotical Mechanics of Composites - Modelling Composites without FEM (Hardcover, 1st ed. 2018)
Igor V. Andrianov, Jan Awrejcewicz, Vladyslav V. Danishevs'kyy
R4,149 R3,428 Discovery Miles 34 280 Save R721 (17%) Ships in 12 - 17 working days

In this book the authors show that it is possible to construct efficient computationally oriented models of multi-parameter complex systems by using asymptotic methods, which can, owing to their simplicity, be directly used for controlling processes arising in connection with composite material systems. The book focuses on this asymptotic-modeling-based approach because it allows us to define the most important out of numerous parameters describing the system, or, in other words, the asymptotic methods allow us to estimate the sensitivity of the system parameters. Further, the book addresses the construction of nonlocal and higher-order homogenized models. Local fields on the micro-level and the influence of so-called non-ideal contact between the matrix and inclusions are modeled and investigated. The book then studies composites with non-regular structure and cluster type composite conductivity, and analyzes edge effects in fiber composite materials. Transition of load from a fiber to a matrix for elastic and viscoelastic composites, various types of fiber composite fractures, and buckling of fibers in fiber-reinforced composites is also investigated. Last but not least, the book includes studies on perforated membranes, plates, and shells, as well as the asymptotic modeling of imperfect nonlinear interfaces.

Developing Novel Spinning Methods to Fabricate Continuous Multifunctional Fibres for Bioapplications (Hardcover, 1st ed. 2018):... Developing Novel Spinning Methods to Fabricate Continuous Multifunctional Fibres for Bioapplications (Hardcover, 1st ed. 2018)
Azadeh Mirabedini
R3,588 R3,149 Discovery Miles 31 490 Save R439 (12%) Ships in 12 - 17 working days

This book describes the development of three dimensional electroactive fibres using a novel coaxial wet-spinning approach from organic conductors in combination with non-conducting hydrogel polymers. This book also presents the characterization and evaluation of multiaxial biofibres in terms of mechanical, physical, electrochemical and biological properties, and explores their use in a diverse range of applications including implantable electrodes, drug delivery systems and energy-storage systems. In the first chapter, the author highlights the significance of engineering three dimensional fibres, introduces the involved hydrogels and organic conductors with emphasis on their biomedical application, and collects some of the previously established methods for fabrication of biofibres. In the second chapter, particular attention is given to the overall experimental fabrication methods and characterization analyses conducted in the work. Chapters three to five present the main findings of this work, in which readers will discover how novel hybrid hydrogel fibres with an inner core of chitosan and alginate were prepared and characterized, how graphene was incorporated into coaxial wet-spun biofibres, and how one-dimensional triaxial fibres were developed using a novel coaxial wet-spinning fibre production method and applied as potential battery devices. In the final chapter of this work, the author summarizes the main achievements of the work and outlines some recommendations for future research.

RILEM 252-CMB Symposium - Chemo-Mechanical Characterization of Bituminous Materials (Hardcover, 1st ed. 2019): Lily D.... RILEM 252-CMB Symposium - Chemo-Mechanical Characterization of Bituminous Materials (Hardcover, 1st ed. 2019)
Lily D. Poulikakos, Augusto Cannone Falchetto, Michael P. Wistuba, Bernhard Hofko, Laurent Porot, …
R4,273 Discovery Miles 42 730 Ships in 10 - 15 working days

This volume contains the Proceedings of the RILEM TC 252-CMB International Symposium on the Chemo-Mechanical Characterization of Bituminous Materials. The Symposium was attended by researchers and practitioners from different fields presenting the latest findings in the chemical, mechanical, and microstructural characterization of bituminous materials. The book offers new and cutting edge papers on innovative techniques for the characterization of bituminous materials, gaining new insights into current issues such as effects of aging, moisture, and temperature.

Shape Casting - 5th International Symposium 2014 (Hardcover, 1st ed. 2016): Murat Tiryakioglu, John Campbell, Glenn Byczynski Shape Casting - 5th International Symposium 2014 (Hardcover, 1st ed. 2016)
Murat Tiryakioglu, John Campbell, Glenn Byczynski
R3,389 Discovery Miles 33 890 Ships in 12 - 17 working days

This collection presents papers on the science, engineering, and technology of shape castings, with contributions from researchers worldwide. Among the topics that are addressed are structure-property-performance relationships, modeling of casting processes, and the effect of casting defects on the mechanical properties of cast alloys.

TMS 2017 146th Annual Meeting & Exhibition Supplemental Proceedings (Hardcover, 1st ed. 2017): The Minerals Metals & Materials... TMS 2017 146th Annual Meeting & Exhibition Supplemental Proceedings (Hardcover, 1st ed. 2017)
The Minerals Metals & Materials Society (Tms)
R5,616 Discovery Miles 56 160 Ships in 10 - 15 working days

This collection features papers presented at the 146th Annual Meeting & Exhibition of The Minerals, Metals & Materials Society.

Designing of Elastomer Nanocomposites: From Theory to Applications (Hardcover, 1st ed. 2017): Klaus Werner Stoeckelhuber, Amit... Designing of Elastomer Nanocomposites: From Theory to Applications (Hardcover, 1st ed. 2017)
Klaus Werner Stoeckelhuber, Amit Das, Manfred Kluppel
R7,448 Discovery Miles 74 480 Ships in 10 - 15 working days

The series Advances in Polymer Science presents critical reviews of the present and future trends in polymer and biopolymer science. It covers all areas of research in polymer and biopolymer science including chemistry, physical chemistry, physics, material science.The thematic volumes are addressed to scientists, whether at universities or in industry, who wish to keep abreast of the important advances in the covered topics.Advances in Polymer Science enjoys a longstanding tradition and good reputation in its community. Each volume is dedicated to a current topic, and each review critically surveys one aspect of that topic, to place it within the context of the volume. The volumes typically summarize the significant developments of the last 5 to 10 years and discuss them critically, presenting selected examples, explaining and illustrating the important principles, and bringing together many important references of primary literature. On that basis, future research directions in the area can be discussed. Advances in Polymer Science volumes thus are important references for every polymer scientist, as well as for other scientists interested in polymer science - as an introduction to a neighboring field, or as a compilation of detailed information for the specialist.Review articles for the individual volumes are invited by the volume editors. Single contributions can be specially commissioned.Readership: Polymer scientists, or& nbsp;scientists in related fields interested in polymer and biopolymer science, at universities or in industry, graduate students.

Spectroscopic Methods in the Study of Kaolin Minerals and Their Modifications (Hardcover, 1st ed. 2019): Jacob (Theo) Kloprogge Spectroscopic Methods in the Study of Kaolin Minerals and Their Modifications (Hardcover, 1st ed. 2019)
Jacob (Theo) Kloprogge
R2,862 Discovery Miles 28 620 Ships in 10 - 15 working days

This book systematically provides an overview of the use of a wide range of spectroscopic methods (Mid- and Near-Infrared, Infrared Emission, Raman, Solid-State Magic Angle Spinning Nuclear Magnetic Resonance, X-ray Photoelectron, Extended X-ray Absorption Fine Structure, X-ray Absorption Near Edge, Electron Spin and Moessbauer spectroscopy) to investigate kaolin minerals (kaolinite, dickite, nacrite and halloysite) and their modifications (intercalation compounds, nanocomposites and other modifications).

Energy Technology 2017 - Carbon Dioxide Management and Other Technologies (Hardcover, 1st ed. 2017): Lei Zhang, Jaroslaw W... Energy Technology 2017 - Carbon Dioxide Management and Other Technologies (Hardcover, 1st ed. 2017)
Lei Zhang, Jaroslaw W Drelich, Neale R. Neelameggham, Donna Post Guillen, Nawshad Haque, …
R5,760 R4,911 Discovery Miles 49 110 Save R849 (15%) Ships in 12 - 17 working days

This collection focuses on energy efficient technologies including innovative ore beneficiation, smelting technologies, recycling and waste heat recovery. The volume also covers various technological aspects of sustainable energy ecosystems, processes that improve energy efficiency, reduce thermal emissions, and reduce carbon dioxide and other greenhouse emissions. Papers addressing renewable energy resources for metals and materials production, waste heat recovery and other industrial energy efficient technologies, new concepts or devices for energy generation and conversion, energy efficiency improvement in process engineering, sustainability and life cycle assessment of energy systems, as well as the thermodynamics and modeling for sustainable metallurgical processes are included. This volume also offers topics on CO2 sequestration and reduction in greenhouse gas emissions from process engineering, sustainable technologies in extractive metallurgy, as well as the materials processing and manufacturing industries with reduced energy consumption and CO2 emission. Contributions from all areas of non-nuclear and non-traditional energy sources, such as solar, wind, and biomass are also included in this volume.Papers from the following symposia are presented in the book:Energy TechnologiesAdvances in Environmental Technologies: Recycling and Sustainability Joint SessionDeriving Value from Challenging Waste Materials: Recycling and Sustainability Joint SessionSolar Cell Silicon

Advanced Composites for Aerospace, Marine, and Land Applications (Hardcover, 1st ed. 2016): Tomoko Sano, T. S. Srivatsan,... Advanced Composites for Aerospace, Marine, and Land Applications (Hardcover, 1st ed. 2016)
Tomoko Sano, T. S. Srivatsan, Michael Peretti
R3,346 Discovery Miles 33 460 Ships in 12 - 17 working days

The papers in this volume cover a broad spectrum of topics that represent the truly diverse nature of the field of composite materials. This collection presents research and findings relevant to the latest advances in composites materials, specifically their use in aerospace, maritime, and even land applications. The editors have made every effort to bring together authors who put forth recent advances in their research while concurrently both elaborating on and thereby enhancing our prevailing understanding of the salient aspects related to the science, engineering, and far-reaching technological applications of composite materials.

Sustainable Innovations in Textile Fibres (Hardcover, 1st ed. 2018): Subramanian Senthilkannan Muthu Sustainable Innovations in Textile Fibres (Hardcover, 1st ed. 2018)
Subramanian Senthilkannan Muthu
R3,140 Discovery Miles 31 400 Ships in 12 - 17 working days

This book highlights the innovations in textile fibres, that is the starting point of the supply chain. There are numerous innovations made in terms of making the existing fibres sustainable and also to discover new sustainable fibres. This book deals with those innovative sustainable textile fibres in detail. It also presents an overview of various current textile fibres, their issues associated with sustainability and how new, sustainable fibres overcome those issues. Finally it discusses the challenges and implications of these sustainable fibres on technical and economic fronts.

Sustainable Phase Change and Polymeric Water Absorbent Materials - Heat Stress Reduction in Helmets (Hardcover, 1st ed. 2020):... Sustainable Phase Change and Polymeric Water Absorbent Materials - Heat Stress Reduction in Helmets (Hardcover, 1st ed. 2020)
Sinnappoo Kanesalingam, Rajkishore Nayak
R2,789 Discovery Miles 27 890 Ships in 10 - 15 working days

This book highlights novel applications of innovative fabrics in the design of an interlayer between the scalp and the helmet lining of motorcycle helmets to control the temperature inside the helmet. It examines various fibre microstructure configurations and fibre treatments in terms of their ability to assist in the dissipation of heat from the scalp. The findings presented here will be of considerable benefit to motorcyclists in South East Asia and other tropical regions.

Damage and Fracture of Ceramic-Matrix Composites Under Stochastic Loading (Hardcover, 1st ed. 2021): Longbiao Li Damage and Fracture of Ceramic-Matrix Composites Under Stochastic Loading (Hardcover, 1st ed. 2021)
Longbiao Li
R4,900 Discovery Miles 49 000 Ships in 12 - 17 working days

This book presents the relationships between tensile damage and fracture, fatigue hysteresis loops, stress-rupture, fatigue life and fatigue limit stress, and stochastic loading stress. Ceramic-matrix composites (CMCs) possess low material density (i.e., only 1/4 - 1/3 of high-temperature alloy) and high-temperature resistance, which can reduce cooling air and improve structure efficiency. Understanding the failure mechanisms and internal damage evolution represents an important step to ensure reliability and safety of CMCs. This book investigates damage and fracture of fiber-reinforced ceramic-matrix composites (CMCs) subjected to stochastic loading, including: (1) tensile damage and fracture of fiber-reinforced CMCs subjected to stochastic loading; (2) fatigue hysteresis loops of fiber-reinforced CMCs subjected to stochastic loading; (3) stress rupture of fiber-reinforced CMCs with stochastic loading at intermediate temperature; (4) fatigue life prediction of fiber-reinforced CMCs subjected to stochastic overloading stress at elevated temperature; and (5) fatigue limit stress prediction of fiber-reinforced CMCs with stochastic loading. This book helps the material scientists and engineering designers to understand and master the damage and fracture of ceramic-matrix composites under stochastic loading.

Nonlinear Dielectric Spectroscopy (Hardcover, 1st ed. 2018): Ranko Richert Nonlinear Dielectric Spectroscopy (Hardcover, 1st ed. 2018)
Ranko Richert
R3,564 Discovery Miles 35 640 Ships in 10 - 15 working days

This book introduces the ideas and concepts of nonlinear dielectric spectroscopy, outlines its history, and provides insight into the present state of the art of the experimental technology and understanding of nonlinear dielectric effects. Emphasis is on what can be learned from nonlinear experiments that could not be derived from the linear counterparts. The book explains that nonlinear dielectric spectroscopy can be used as a tool to measure structural recovery or physical aging, as well as connections between dynamics and thermodynamic variables such as enthalpy and entropy. Supercooled liquids in their viscous regime are ideal candidates for investigating nonlinear effects, because they are particularly sensitive to changes in temperature, and thus also to changes in the electric field. Other interesting materials covered are plastic crystals and complex liquids near criticality. The book also points out that, compared with other techniques such as mechanical shear experiments, the nonlinear regime of dielectric spectroscopy is special in the sense that the energies involved always remain small compared with thermal energies. To demonstrate this, nonlinear features of mechanical experiments are discussed. Theoretical approaches to nonlinear effects are particularly complicated because the tools available for the linear regime no longer apply. As a result, there is no single generally accepted theory to nonlinear dielectric responses of real liquids. Various approaches to nonlinear dielectric features have been reported, and the different aspects are communicated in several chapters. The book communicates recent progress most effectively through individual contributions from specialists in their respective fields.Chapter 'Third and Fifth Harmonic Responses in Viscous Liquids' is available open access under a Creative Commons Attribution 4.0 International License via link.springer.com.

Recycled Polyester - Manufacturing, Properties, Test Methods, and Identification (Hardcover, 1st ed. 2020): Subramanian... Recycled Polyester - Manufacturing, Properties, Test Methods, and Identification (Hardcover, 1st ed. 2020)
Subramanian Senthilkannan Muthu
R3,028 Discovery Miles 30 280 Ships in 10 - 15 working days

This book provides an overview of recycled polyesters, which are an important sustainable raw material in textile production. It discusses the manufacturing methods and the unique properties of recycled polyesters manufactured using the different methods. It also highlights the various test methods and identification mechanisms for recycled polyesters, which are very essential for ensuring the traceability and conformity of usage of recycled polyester in the final product.

Computational Materials System Design (Hardcover, 1st ed. 2018): Dongwon Shin, James Saal Computational Materials System Design (Hardcover, 1st ed. 2018)
Dongwon Shin, James Saal
R3,956 Discovery Miles 39 560 Ships in 12 - 17 working days

This book provides state-of-the-art computational approaches for accelerating materials discovery, synthesis, and processing using thermodynamics and kinetics. The authors deliver an overview of current practical computational tools for materials design in the field. They describe ways to integrate thermodynamics and kinetics and how the two can supplement each other.

Searching for 2D Superconductivity in La2 xSrxCuO4 Single Crystals (Hardcover, 1st ed. 2019): Itzik Kapon Searching for 2D Superconductivity in La2 xSrxCuO4 Single Crystals (Hardcover, 1st ed. 2019)
Itzik Kapon
R2,789 Discovery Miles 27 890 Ships in 10 - 15 working days

A new experimental method - the "Stiffnessometer", is developed to measure elementary properties of a superconductor, including the superconducting stiffness and the critical current. This technique has many advantages over existing methods, such as: the ability to measure these properties while minimally disturbing the system; the ability to measure large penetration depths (comparable to sample size), as necessary when approaching the critical temperature; and the ability to measure critical currents without attaching contacts and heating the sample. The power of this method is demonstrated in a study of the penetration depth of LSCO, where striking evidence is found for two separate critical temperatures for the in-plane and out-of-plane directions. The results in the thesis are novel, important and currently have no theoretical explanation. The stiffnessometer in a tool with great potential to explore new grounds in condensed matter physics.

Proceedings of the 2nd World Congress on Integrated Computational Materials Engineering (ICME) (Hardcover, 1st ed. 2016): Mei... Proceedings of the 2nd World Congress on Integrated Computational Materials Engineering (ICME) (Hardcover, 1st ed. 2016)
Mei Li, Carelyn Campbell, Katsuyo Thornton, Elizabeth Holm, Peter Gumbsch
R5,233 R4,666 Discovery Miles 46 660 Save R567 (11%) Ships in 12 - 17 working days

This book represents a collection of papers presented at the 2nd World Congress on Integrated Computational Materials Engineering (ICME), a specialty conference organized by The Minerals, Metals & Materials Society (TMS).

Materials Design and Applications (Hardcover, 1st ed. 2017): Lucas F. M. da Silva Materials Design and Applications (Hardcover, 1st ed. 2017)
Lucas F. M. da Silva
R4,821 Discovery Miles 48 210 Ships in 12 - 17 working days

This volume features fundamental research and applications in the field of the design and application of engineering materials, predominantly within the context of mechanical engineering applications. This includes a wide range of materials engineering and technology, including metals, e.g., polymers, composites, and ceramics. Advanced applications would include manufacturing in the new or newer materials, testing methods, multi-scale experimental and computational aspects. This book features fundamental research and applications in the design of engineering materials, predominantly within the context of mechanical engineering applications such as automobile, railway, marine, aerospace, biomedical, pressure vessel technology, and turbine technology. It covers a wide range of materials, including metals, polymers, composites, and ceramics. Advanced applications include the manufacturing of new materials, testing methods, multi-scale experimental and computational aspects. p>

Vapor Crystal Growth and Characterization - ZnSe and Related II-VI Compound Semiconductors (Hardcover, 1st ed. 2020): Ching-Hua... Vapor Crystal Growth and Characterization - ZnSe and Related II-VI Compound Semiconductors (Hardcover, 1st ed. 2020)
Ching-Hua Su
R2,801 Discovery Miles 28 010 Ships in 10 - 15 working days

The book describes developments in the crystal growth of bulk II-VI semiconductor materials. A fundamental, systematic, and in-depth study of the physical vapor transport (PVT) growth process is the key to producing high-quality single crystals of semiconductors. As such, the book offers a comprehensive overview of the extensive studies on ZnSe and related II-VI wide bandgap compound semiconductors, such as CdS, CdTe, ZnTe, ZnSeTe and ZnSeS. Further, it shows the detailed steps for the growth of bulk crystals enabling optical devices which can operate in the visible spectrum for applications such as blue light emitting diodes, lasers for optical displays and in the mid-IR wavelength range, high density recording, and military communications. The book then discusses the advantages of crystallization from vapor compared to the conventional melt growth: lower processing temperatures, the purification process associated with PVT, and the improved surface morphology of the grown crystals, as well as the necessary drawbacks to the PVT process, such as the low and inconsistent growth rates and the low yield of single crystals. By presenting in-situ measurements of transport rate, partial pressures and interferometry, as well as visual observations, the book provides detailed insights into in the kinetics during the PVT process. This book is intended for graduate students and professionals in materials science as well as engineers preparing and developing optical devices with semiconductors.

Materials Processing Fundamentals (Hardcover, 1st ed. 2016): Lifeng Zhang, Antoine Allanore, Cong Wang, James Yurko, Justin... Materials Processing Fundamentals (Hardcover, 1st ed. 2016)
Lifeng Zhang, Antoine Allanore, Cong Wang, James Yurko, Justin Crapps
R3,398 Discovery Miles 33 980 Ships in 12 - 17 working days

This collection provides researchers and industry professionals with complete guidance on the synthesis, analysis, design, monitoring, and control of metals, materials, and metallurgical processes and phenomena. Along with the fundamentals, it covers modeling of diverse phenomena in processes involving iron, steel, non-ferrous metals, and composites. It also goes on to examine second phase particles in metals, novel sensors for hostile-environment materials processes, online sampling and analysis techniques, and models for real-time process control and quality monitoring systems.

New Acoustics Based on Metamaterials (Hardcover, 1st ed. 2018): Woon Siong Gan New Acoustics Based on Metamaterials (Hardcover, 1st ed. 2018)
Woon Siong Gan
R5,884 Discovery Miles 58 840 Ships in 12 - 17 working days

This book highlights the acoustical metamaterials' capability to manipulate the direction of sound propagation in solids which in turn control the scattering, diffraction and refraction, the three basic mechanisms of sound propagation in solids. This gives rise to several novel theories and applications and hence the name new acoustics. As an introduction, the book mentions that symmetry of acoustic fields is the theoretical framework of acoustical metamaterials. This is then followed by describing that acoustical metamaterials began with locally resonant sonic materials which ushered in the concept of negative acoustic parameters such as mass density and bulk modulus. This complies with form invariance of the acoustic equation of motion which again exemplifies the symmetry property of acoustic fields.

Numerical Simulation and Experimental Investigation of the Fracture Behaviour of an Electron Beam Welded Steel Joint... Numerical Simulation and Experimental Investigation of the Fracture Behaviour of an Electron Beam Welded Steel Joint (Hardcover, 1st ed. 2018)
Haoyun Tu
R3,257 Discovery Miles 32 570 Ships in 12 - 17 working days

In this thesis, the author investigates experimentally and numericallythe fracture behavior of an electron beam welded joint made fromtwo butt S355 plates. The 2D Rousselier model, the Gurson-Tvergaard-Needleman (GTN) model and the cohesive zone model (CZM) wereadopted to predict the crack propagation of thick compact tension (CT)specimens. Advantages and disadvantages of the three mentioned modelsare discussed. The cohesive zone model is suggested as it is easy to usefor scientists & engineers because the CZM has less model parametersand can be used to simulate arbitrary crack propagation. The resultsshown in this thesis help to evaluate the fracture behavior of a metallicmaterial. A 3D optical deformation measurement system (ARAMIS) andthe synchrotron radiation-computed laminography (SRCL) techniquereveal for the first time the damage evolution on the surface of the sampleand inside a thin sheet specimen obtained from steel S355. Damageevolution by void initiation, growth and coalescence are visualized in2D and 3D laminographic images. Two fracture types, i.e., a flat crackpropagation originated from void initiation, growth and coalescenceand a shear coalescence mechanism are visualized in 2D and 3D imagesof laminographic data, showing the complexity of real fracture. Inthe dissertation, the 3D Rousselier model is applied for the first timesuccessfully to predict different microcrack shapes before shear cracksarise by defining the finite elements in front of the initial notch withinhomogeneous f0-values. The influence of the distribution of inclusionson the fracture shape is also discussed. For the analyzed material, ahomogeneous distribution of particles in the material provides thehighest resistance to fracture.

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