Materialelære

This book first provides a systematic and thorough introduction to the classical laminate theory for composite materials based on the theory for plane elasticity elements and classical (shear-rigid) plate elements. The focus is on unidirectional lamina which can be described based on orthotropic constitutive equations and their composition to layered laminates. In addition to the elastic behavior, failure is investigated based on the maximum stress, maximum strain, Tsai-Hill, and the Tsai-Wu criteria.The solution of the fundamental equations of the classical laminate theory is connected with extensive matrix operations, and many problems require in addition iteration loops. Thus, a classical hand calculation of related problems is extremely time consuming. In order to facilitate the application of the classical laminate theory, we decided to provide a Python-based computational tool, the so-called Composite Laminate Analysis Tool (CLAT) to easily solve somestandard questions from the context of fiber-reinforced composites. The tool runs in any standard web browser and offers a user-friendly interface with many post-processing options. The functionality comprises stress and strain analysis of lamina and laminates, derivation of off-axis elastic properties of lamina, and the failure analysis based on different criteria.

How long have composites been around? Where does the classical laminate theory come from? Who made the first modern fiber composite? This work in the history of materials science is the first examination of the strategies employed in the nineteenth and twentieth centuries in researching and developing hybrid materials. The author analyzes numerous sources which record a regular back and forth between applied design and exploratory materials engineering in building such ¿modular materials¿. The motivations, ideas, and concepts of engineers, scientists, and other players in industry and research are also examined within the context of their day. This book presents the development and importance of composite materials within historical context.The content includesEarly composite materialsThe development of composite materials in the industrial nineteenth centuryComposites in twentieth-century polymer chemistryThe development of hybrid material systems in the second half of the twentieth centurySummary.The author:Dr. Andreas T. Haka is an engineer and historian of science and technology. He is currently a lecturer in the Section for the History of Science and Technology at the University of Stuttgart. His main focus is on the history and practice of materials research, raw materials, materials science and technological constructive design, scientific networks, and research technologies.

This biography provides an understanding of William Bateson as well as a reconciliation of diverging views (e.g. the hierarchical thinking of Gould and the genocentrism of George Williams and Richard Dawkins). Evolutionists may thus, at long last, present a unified front to their creationist opponents. The pressing need for this text is apparent from the high percentages reported not to believe in evolution and the growth of the so-called "e;intelligent design"e; movement.

This book presents an innovative methodology to fabricate nanostructured piezoelectric composite fibers with wearable technologies application as an energy generator and/or sensors. It reports on methods of piezoelectric fiber formation and development of novel textile structures (weave, knit, braid, coil) with embedded electrodes. The flexibility and small diameter of the final fiber make it possible to use them in garment without affecting structure of comfort. The performance of the fiber generators was evaluated through different applications such as air and water sensor, health and movement monitoring, and energy generator. The book targets a wide readership including materials scientists, electrical engineering, soft robotics, Internet of things, electronic textiles, and wearable technology.

Balancing of rotors is an indispensable process for the quality management, involving many stages from design to commissioning. With every further development of rotors - with new concepts, materials and machining methods - the demands on balancing technology change. In the search for the optimum solution to these complex tasks, no patent remedies will help, but only a sound knowledge of the theoretical background of balancing, its practical implementation and the performance of the various balancing systems.This book is intended to support systematic familiarisation with the subject and ongoing training - in practice as well as in theory.The focus of current balancing standards is on deviations that occur during balancing - intentionally generated, or accidentally created. They must be properly analysed and taken into account in order to determine the permissible indications for residual unbalance. In addition, the acceptance criteria were specified so that the balancing objective - the targeted balancing quality - can be reliably achieved.When balancing rotors with shaft-elastic behaviour, work is often still carried out according to outdated patterns. For this reason, the new modal approach was further elaborated - partly on the basis of DIN ISO 21940 Part 12, Supplement 1. For practical application, the difficult choice of compensation planes and the relevant bending eigenmodes is explained by means of examples.

This book describes cutting edge technology using supercritical fluids for the production of foodstuffs, medicals, and polymers. It illustrates the importance and use of basic data for design and operation at industrial scale units. The book's authors have several decades of experience of applied research on how to develop large scale industrial units. It provides readers complete insight in design and operation of industrial high pressure process plants. The book is written so it may be understood for people (with?) little or no background on high pressure process technology. It will provide information on how some foodstuffs, medicals, polymers are produced using high pressure technologies. The book demonstrates the importance of fundamental data, how to measure them and how to apply them to design industrial plants. At the same time, it also serves as a textbook for students.

This book is an evidence-based update on recent most significant advances in dental ceramics, specifically related to the relationships between composition, microstructure and mechanical behavior. Readers will find an introduction to the chemistry of dental ceramics as well as information about the technological progress and practical requirements restorative materials need to satisfy for long-lasting structural integrity. The book uses mechanistic approaches to address failure mechanisms from controlled experiments thus providing the tools for the application of sound research methodologies in the field. It is targeted for researcher and dentists interested in the field of dental ceramic materials and fracture mechanics.

This book offers historical and state-of-the-art molecular spectroscopy methods and applications in dynamic compression science, aimed at the upcoming generation in physical sciences involved in studies of materials at extremes. It begins with addressing the motivation for probing shock compressed molecular materials with spectroscopy and then reviews historical developments and the basics of the various spectroscopic methods that have been utilized. Introductory chapters are devoted to fundamentals of molecular spectroscopy, overviews of dynamic compression technologies, and diagnostics used to quantify the shock compression state during spectroscopy experiments. Subsequent chapters describe all the molecular spectroscopic methods used in shock compression research to date, including theory, experimental details for application to shocked materials, and difficulties that can be encountered. Each of these chapters also includes a section comparing static compression results. The last chapter offers an outlook for the future, which leads the next-generation readers to tackling persistent problems.

This book provides a systematic and standardized approach based on the authors' over 30 years of research experience with weight function methods, as well as the relevant literature. Fracture mechanics has become an indispensable tool for the design and safe operation of damage-tolerant structures in many important technical areas. The stress intensity factor-the characterizing parameter of the crack tip field-is the foundation of fracture mechanics analysis. The weight function method is a powerful technique for determining stress intensity factors and crack opening displacements for complex load conditions, with remarkable computational efficiency and high accuracy.The book presents the theoretical background of the weight function methods, together with a wealth of analytical weight functions and stress intensity factors for two- and three-dimensional crack geometries; many of these have been incorporated into national, international standards and industrial codes of practice. The accuracy of the results is rigorously verified, and various sample applications are provided. Accordingly, the book offers an ideal reference source for graduate students, researchers, and engineers whose work involves fracture and fatigue of materials and structures, who need not only stress intensity factors themselves but also efficient and reliable tools for obtaining them.

This book reviews applications of nanomaterial and nanodevices in the food industry. It also discusses the advanced bioanalytical techniques, including Enzyme-Linked Immunosorbent Assay (ELISA), immunoanalytical techniques, and monoclonal antibody-based immunological techniques for detecting food adulterations and allergens. It comprehensively covers electrode modification and nano-engineered fabrication of biosensors to enhance their functionalities for utilization in food industries. The book highlights the utilization of nanobiosensors for food safety and quality analysis, such as detection of toxin, food-borne pathogen, allergen, evaluation of toxicity etc. Further, it also summarizes the recent advances in nanodevices such as nano-systems, nano-emulsions, nanopesticides, and nanocapsules and their applications in the food industry. Lastly, it covers nanomaterial-based sensors for drug analysis in diverse matrices. It serves as an invaluable source of information for professionals, researchers, academicians, and students related to food science and technology.

This book includes fourteen chapters on photocatalysis. It provides a thorough overview of the latest research on photocatalysts and examines recent trends in the field. Chapters address such topics as metal-organic frameworks, semiconductors, self¿cleaning coatings and surfaces, the use of ¿green¿ agents to fabricate materials, fabrication of advanced nanocomposites for the production of hydrogen, bifunctional catalysts for metal-air batteries, and much more.

Carbon Nanotubes - Recent Advances, New Perspectives and Potential Applications covers all the important nanotechnological aspects of carbon materials, including their growth and characterization, processing and fabrication, development and potential applications. Recent developments, innovative preparation methods and promising new frontiers around this advanced nanotechnology are reviewed under the editorship of an internationally renowned scientist. This book will be useful to a diverse range of readers and will be important for research organizations, government research centers, academic libraries, and those involved in the research and development of carbon materials.

A thin film is a layer of material ranging from fractions of a nanometer to several micrometers in thickness. Thin films have been employed in many applications to provide surfaces that possess specific optical, electronic, chemical, mechanical and thermal properties. Through ten chapters consisting of original research studies and literature reviews written by experts from the international scientific community, this book covers the deposition and application of thin films.

This book presents an overview of the current status and recent trends in nanofibers, their fabrication and applications. The aim is to provide readers with a clear understanding of the electrospinning process both in theory and applications. Challenges, opportunities and new directions for the future development of electrospinning technology are also discussed. The book provides fundamental knowledge and up-to-date information to enable advanced study in the field of nanofibers and their applications. It will therefore be of interest to research students, scientists, engineers, and materials scientists.

This book gives a brief history of the development of Alloy 625 and a detailed account of its physical, mechanical, and corrosion properties. It also addresses different types of microstructural changes the Alloy 625 undergoes at intermediate temperatures; provides details of properties deterioration due to such microstructural changes; assesses the alloy damage during the in-service inspection of plants; and provides criteria for the damage evaluation for various destructive and non-destructive testing. It combines the industrial data and literature together in one place for damage assessment of service exposed Alloy 625 components. This book serves as a guide to practicing engineers in the industry interested in the use of Alloy 625 and in academia for students pursuing advanced courses in materials science. Alloy 625 is a versatile nickel-chromium-molybdenum alloy known for its unique combination of high strength, excellent fabricability and weldability, and outstanding corrosion resistance.

This volume highlights the latest advances, innovations, and applications in the field of sustainable concrete structures, as presented by scientists and engineers at the RILEM International Conference on Numerical Modeling Strategies for Sustainable Concrete Structures (SSCS), held in Marseille, France, on July 4-6, 2022. It demonstrates that numerical methods (finite elements, finite volumes, finite differences) are a relevant response to the challenge to optimize the utilization of cement in concrete constructions while checking that these constructions have a lifespan compatible with the stakes of sustainable development. They are indeed accurate tools for an optimized design of concrete constructions, and allow us to consider all types of complexities: for example, those linked to rheological, physicochemical and mechanical properties of concrete, those linked to the geometry of the structures or even to the environmental boundary conditions. This optimization must also respect constraints of time, money, security, energy, CO2 emissions, and, more generally, life cycle more reliably than the codes and analytical approaches currently used. Numerical methods are, undoubtedly, the best calculation tools at the service of concrete eco-construction. The contributions present traditional and new ideas that will open novel research directions and foster multidisciplinary collaboration between different specialists.

The NUMISHEET conference series is the most significant international conference on the area of the numerical simulation of sheet metal forming processes. It gathers the most prominent experts in numerical methods in sheet forming processes and is an outstanding forum for the exchange of ideas and for the discussion of technologies related to sheet metal forming processes. Topics covered in this volume include but are not limited to the following: Materials Modeling and Experimental Testing MethodsFriction and ContactFormability, Necking, and FractureInstabilities and Surface DefectsFracture and DamageNumerical MethodsSpringbackIncremental Sheet FormingRoll FormingInnovative Forming MethodsProduct and Process Design and Optimization

Non-collinear spin textures have attracted significant attention due to their topological nature, emergent electromagnetic properties, and potential spintronic and magnonic device applications. This book explores the physical properties of distinct spin textures in D2d compounds. The main goals of the work are (a) discovering new spin textures in D2d Heusler compounds and studying their detailed properties to enrich the field of non-collinear magnetism (b) optimizing the nano-track geometry and generating isolated and single chains of nano-objects that will establish new hallmarks for technological applications (c) studying the stability of spin textures with magnetic fields and temperatures and finding a way to observe the striking behavior of spin textures near the specimen edges. The first few chapters provide a brief overview of spin textures such as Bloch and Neel skyrmions. In the experimental methods section, the author shows how to identify the single-crystalline grains of a polycrystalline sample, how to make single-crystalline thin specimens and nano-tracks, and then provides explicit descriptions of different imaging techniques performed on a transmission electron microscope. This part will be valuable for beginners wishing to conduct research in experimental nano-magnetism and transmission electron microscope imaging. The core results of the book are presented in four chapters, describing the discovery of several new and unanticipated spin textures, namely square-shaped antiskyrmions, elliptical Bloch skyrmions, fractional antiskyrmions, fractional Bloch skyrmions and elongated (anti)skyrmions in a single D2d Heusler compound. It is shown that these textures can be understood by a combination of dipole-dipole interactions and a chiral vector exchange that makes it possible to stabilize various spin textures even in the same compound. The D2d compounds are the first non-centrosymmetric systems shown to host several co-existing non-collinear spin textures.

This second edition volume expands on the previous edition with new and updated chapters on the latest developments in the study of yeast within the biotechnology field. The chapters in this book cover topics such as transformation protocols for genetic engineering of Saccaromyces cerevisiae and Komagataella spp.; an overview of selection markers, promoters, and strains used for metabolic engineering of S. cerevisiae, P. pastoris, and Z. bailii; the use of yeast in CRISPR/Cas9 technology; tools to study metabolic pathway in Yarrowia lypolitica; and a discussion on the "e;universal expression system"e; that is applied in a broad spectrum of fungal species. Written in the highly successful Methods in Molecular Biology series format, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible laboratory protocols, and tips on troubleshooting and avoiding known pitfalls.Cutting-edge and authoritative, Yeast Metabolic Engineering: Methods and Protocols, Second Edition is a valuable resource for researchers and scientists interested in learning more about this important and developing field.

This detailed volume explores newly-developed methods in PIWI-interacting RNAs (piRNAs) research, methods currently applied to other ncRNAs involved in nuclear regulation which can be used to study piRNAs, and piRNA methods applied in non-classical organisms. It also includes several bioinformatic and biophysical methods related to piRNA studies, consistent with the increasing importance of high-throughput sequencing and computational methods. Written for the highly successful Methods in Molecular Biology series, chapters include introductions to their respective topics, lists of the necessary materials, step-by-step, readily reproducible protocols, and tips on troubleshooting and avoiding known pitfalls. Authoritative and up-to-date, piRNA: Methods and Protocols serves as an ideal guide for researchers seeking to elucidate the numerous mysteries of this area of multicellular biology.

Electrochemistry and Photo-Electrochemistry of Nanomaterials: Fundamentals and Applications explores how nanotechnology and nanomaterials can be utilized in the field of electrochemistry and photo-electrochemistry. The book covers the fundamentals of nanoscale electrochemistry and photo-electrochemistry for nanoscale materials systems, including multilayer nanofilms, nanowires, nanotubes, nanoparticles embedded in metal matrixes, and membranes containing nanoparticles. The creation of new materials for energy and sensing technologies that rely on understanding and control of chemical processes is also emphasized. Advances in characterization, synthesis, and fabrication of nanoscale materials and technologies are also discussed regarding the design of new materials. This book is suitable for academics and industry professionals working in the subject areas of materials science, materials chemistry, inorganic chemistry, and energy.