Download or read book On the Singular Stress Field at the Interface of Bimaterial Systems microform written by Mingan Tan and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 1998 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book On the Singular Stress Field at the Interface of Bimaterial Systems written by Mingan Tan and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Inverse square root, 1/r, singularity characterizes the stress field at the crack tip of homogeneous isotropic elastic media. This 1/r singularity does not, however, hold for the stress field at the interface of a bimaterial system. A number of attempts have been made to treat this class of problems. These attempts reveal the presence of rapid oscillations in the stress and displacement fields and the dependence of the stress singularities upon the geometry and the elastic mismatch of the bimaterial system. These features complicate the determination of the singular stress field significantly. As a result, existing solutions are limited to a few specific configurations and simple loading conditions. It is, therefore, the objective of this thesis to develop a unified approach for treating general bimaterial systems. For this purpose, the bimaterial system is modeled as a bimaterial wedge, thus facilitating the simulation of a wide range of inhomogeneous solids--such as, layered composite materials, coated components and welded structures. Both theoretical and experimental techniques are employed to examine the current problem and the resulting singular stress field. The current boundary value problem is formulated in terms of the complex function method. By examining the resultant eigenequation of the system, the dependence of the stress singularities upon wedge geometry and elastic properties of the constituents is revealed and explicit expressions for the stress and displacement fields around the wedge vertex are obtained. These expressions are then used to develop a new singular finite element. This element enables the determination of the singular stress field and the associated stress intensity factors reliably and efficiently. Both quasi-static and dynamic stress intensity factors are obtained explicitly. To establish the validity of the newly developed method, a number of test cases are examined and compared with existing simplified solutions. The newly proposed method is then used to evaluate the effect of the wedge geometry, elastic mismatch, density ratio and loading conditions upon the resulting stress intensity factors. In the experimental work, a digital photoelastic technique is employed to examine the singular stress field around the vertex of a photoelastic bimaterial wedge. A special casting procedure is introduced to produce bimaterial photoelastic specimens with varied geometries. To determine the stress intensity factors reliably from the resulting isochromatic fringe patterns, a high order representation of the stress field around the vertex is used and a multi-parameter analysis method is developed. The experimental results are compared with the theoretical findings and the results reveal a good agreement between them.
Download or read book Physics Briefs written by and published by . This book was released on 1990 with total page 1266 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Continuum Mechanics written by Fridtjov Irgens and published by Springer Science & Business Media. This book was released on 2008-01-10 with total page 667 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents an introduction into the entire science of Continuum Mechanics in three parts. The presentation is modern and comprehensive. Its introduction into tensors is very gentle. The book contains many examples and exercises, and is intended for scientists, practitioners and students of mechanics.
Download or read book Biopolymers from Renewable Resources written by David L. Kaplan and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biopolymers from Renewable Resources is a compilation of information on the diverse and useful polymers derived from agricultural, animal, and microbial sources. The volume provides insight into the diversity of polymers obtained directly from, or derived from, renewable resources. The beneficial aspects of utilizing polymers from renewable resources, when considering synthesis, pro cessing, disposal, biodegradability, and overall material life-cycle issues, suggests that this will continue to be an important and growing area of interest. The individual chapters provide information on synthesis, processing and properties for a variety of polyamides, polysaccharides, polyesters and polyphenols. The reader will have a single volume that provides a resource from which to gain initial insights into this diverse field and from which key references and contacts can be drawn. Aspects of biology, biotechnology, polymer synthesis, polymer processing and engineering, mechanical properties and biophysics are addressed to varying degrees for the specific biopolymers. The volume can be used as a reference book or as a teaching text. At the more practical level, the range of important materials derived from renewable resources is both extensive and impressive. Gels, additives, fibers, coatings and films are generated from a variety of the biopolymers reviewed in this volume. These polymers are used in commodity materials in our everyday lives, as well as in specialty products.
Download or read book Grain Boundary Segregation in Metals written by Pavel Lejcek and published by Springer Science & Business Media. This book was released on 2010-07-20 with total page 249 pages. Available in PDF, EPUB and Kindle. Book excerpt: Grain boundaries are important structural components of polycrystalline materials used in the vast majority of technical applications. Because grain boundaries form a continuous network throughout such materials, their properties may limit their practical use. One of the serious phenomena which evoke these limitations is the grain boundary segregation of impurities. It results in the loss of grain boundary cohesion and consequently, in brittle fracture of the materials. The current book deals with fundamentals of grain boundary segregation in metallic materials and its relationship to the grain boundary structure, classification and other materials properties.
Download or read book Technology in Forensic Science written by Deepak Rawtani and published by John Wiley & Sons. This book was released on 2020-11-02 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book "Technology in Forensic Science" provides an integrated approach by reviewing the usage of modern forensic tools as well as the methods for interpretation of the results. Starting with best practices on sample taking, the book then reviews analytical methods such as high-resolution microscopy and chromatography, biometric approaches, and advanced sensor technology as well as emerging technologies such as nanotechnology and taggant technology. It concludes with an outlook to emerging methods such as AI-based approaches to forensic investigations.
Download or read book Thermoplastic Starch written by Leon Janssen and published by John Wiley & Sons. This book was released on 2009-09-03 with total page 255 pages. Available in PDF, EPUB and Kindle. Book excerpt: This first book on this new green material collates all the information hitherto scattered in journal articles and on websites, thus meeting the application-oriented needs of the reader. The contents stretch between many important areas, such as production and applications of biopolymeric material, fundamental knowledge and practical applications, and includes valuable experimental case studies, which can be directly used in industrial practice. All the data satisfies EU environmental regulations, which are the most stringent worldwide.
Download or read book Analysis and Simulation of Contact Problems written by Peter Wriggers and published by Springer Science & Business Media. This book was released on 2006-08-15 with total page 393 pages. Available in PDF, EPUB and Kindle. Book excerpt: This carefully edited book offers a state-of-the-art overview on formulation, mathematical analysis and numerical solution procedures of contact problems. The contributions collected in this volume summarize the lectures presented by leading scientists in the area of contact mechanics, during the 4th Contact Mechanics International Symposium (CMIS) held in Hannover, Germany, 2005.
Download or read book Modeling of Adhesively Bonded Joints written by Lucas F. M. da Silva and published by Springer Science & Business Media. This book was released on 2008-10-14 with total page 335 pages. Available in PDF, EPUB and Kindle. Book excerpt: A lot of recent developments have been made about adhesively bonded joints modeling using various methods of analysis. The increasing application of adhesives in industry is partly due to the increased sophistication and reliability of adhesive joints modeling. The book proposed intends to provide the designer with the most advanced stress analyses techniques in adhesive joints to reinforce the use of this promising bonding technique.
Download or read book Mechanical Ice Release Processes written by Kazuhiko Itagaki and published by . This book was released on 1983 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ice accreted on high-speed rotors operating in supercooled fog can be thrown off by centrifugal force, creating severe unbalance and dangerous projectiles. A simple force balance analysis indicates that the strength of accreted ice and its adhesive strength can be obtained by measuring the thickness of the accretion, the location of the separation, the rotor speed, and the density. Such an analysis was applied to field and laboratory observations of self-shedding events. The results agree reasonably well with other observations. (Author).
Download or read book Mass Transfer II written by K A Gavhane and published by Nirali Prakashan. This book was released on 2015 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt: Distillation - Liquid-Liquid Extraction - Adsorption and Ion Exchange - Leaching - Crystallisation - Drying - Appendix - I
Download or read book Nanocosmetics and Nanomedicines written by Ruy Beck and published by Springer Science & Business Media. This book was released on 2011-04-06 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book "Nanocosmetics and nanomedicines: new approaches for skin care” contains a summary of the most important nanocarriers for skin delivery. Although “nanocosmetics” is a subject widely commented in the academy and the beauty industry, a book covering the skin care treatments using nanotechnological approaches with cosmetics and nanomedicines is still missing, therefore the need for this publication. This book is divided in three parts: The first one (Part A) is devoted to a brief review on the main topics related to the skin delivery and to the introduction of the subject “nanocosmetics”. The second part (Part B) presents different types of nanocarriers applied as skin delivery systems for cosmetics or drugs. The last part (Part C) shows a wide range of applications of nanotechnology on the skin care area as well as on dermatocosmetic and dermatological fields.
Download or read book Combinatorics and Finite Geometry written by Steven T. Dougherty and published by Springer Nature. This book was released on 2020-10-30 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: This undergraduate textbook is suitable for introductory classes in combinatorics and related topics. The book covers a wide range of both pure and applied combinatorics, beginning with the very basics of enumeration and then going on to Latin squares, graphs and designs. The latter topic is closely related to finite geometry, which is developed in parallel. Applications to probability theory, algebra, coding theory, cryptology and combinatorial game theory comprise the later chapters. Throughout the book, examples and exercises illustrate the material, and the interrelations between the various topics is emphasized. Readers looking to take first steps toward the study of combinatorics, finite geometry, design theory, coding theory, or cryptology will find this book valuable. Essentially self-contained, there are very few prerequisites aside from some mathematical maturity, and the little algebra required is covered in the text. The book is also a valuable resource for anyone interested in discrete mathematics as it ties together a wide variety of topics.
Download or read book Marine and Industrial Biofouling written by Hans-Curt Flemming and published by Springer Science & Business Media. This book was released on 2008-12-11 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biofouling is a costly problem, and it is encountered in a wide spectrum of technical systems, ranging from the shipping industry, power industry, water purification, automobile industry, paint and pharmaceuticals, to the microelectronics and food industries. Micro- and macroorganisms attach to surfaces and accumulate there, forming biofilms that cause interferences – a fundamentally natural process. Usually, a medical paradigm is applied: kill biofilms and the problem is solved. This leads to excessive biocide use. However, the success of this strategy is very limited; furthermore it leads to equipment damage and environmental pollution. Simply trying to kill the fouling organisms is clearly not seen as a successful strategy while cleaning is put forward as much more important. In this book, strategies to prevent adhesion, to mitigate the extent and effects of biofouling, and to detect and remove fouling layers are presented. Holistic approaches to the fouling process are elaborated, taking into account options such as nutrient limitation, repellent and easy-to-clean surfaces for fouling layer limitation, and replacing biocides with more environmentally friendly methods – in other words: learning how to live with fouling biofilms without suffering the damage they can do.
Download or read book Biocommunication in Soil Microorganisms written by Günther Witzany and published by Springer Science & Business Media. This book was released on 2010-11-01 with total page 483 pages. Available in PDF, EPUB and Kindle. Book excerpt: Communication is defined as an interaction between at least two living agents which share a repertoire of signs. These are combined according to syntactic, semantic and context-dependent, pragmatic rules in order to coordinate behavior. This volume deals with the important roles of soil bacteria in parasitic and symbiotic interactions with viruses, plants, animals and fungi. Starting with a general overview of the key levels of communication between bacteria, further reviews examine the various aspects of intracellular as well as intercellular biocommunication between soil microorganisms. This includes the various levels of biocommunication between phages and bacteria, between soil algae and bacteria, and between bacteria, fungi and plants in the rhizosphere, the role of plasmids and transposons, horizontal gene transfer, quorum sensing and quorum quenching, bacterial-host cohabitation, phage-mediated genetic exchange and soil viral ecology.
Download or read book Hydrogen Bonded Polymers written by Wolfgang Binder and published by Springer Science & Business Media. This book was released on 2007-03-16 with total page 215 pages. Available in PDF, EPUB and Kindle. Book excerpt: Control of polymeric structure is among the most important endeavours of modern macromolecular science. In particular, tailoring the positioning and strength of intermolecular forces within macromolecules by synthetic methods and thus gaining structural control over the final polymeric materials has become feasible, resulting in the field of supramolecular polymer science. Besides other intermolecular forces, hydrogen bonds are unique intermolecular forces enabling the tuning of material properties via self-assembly processes over a wide range of interactions strength ranging from several kJmol to several tens of kJmol . Central for the formation of these structures are precursor molecules of small molecular weight (usually lower than 10 000), which can assemble in solid or solution to aggregates of defined geometry.
