Download or read book Mechanics of Fatigue Crack Closure written by Wolf Elber and published by ASTM International. This book was released on 1988 with total page 671 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fatigue Damage Crack Growth and Life Prediction written by F. Ellyin and published by Springer Science & Business Media. This book was released on 1996-11-30 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fatigue failure is a multi-stage process. It begins with the initiation of cracks, and with continued cyclic loading the cracks propagate, finally leading to the rupture of a component or specimen. The demarcation between the above stages is not well-defined. Depending upon the scale of interest, the variation may span three orders of magnitude. For example, to a material scientist an initiated crack may be of the order of a micron, whereas for an engineer it can be of the order of a millimetre. It is not surprising therefore to see that investigation of the fatigue process has followed different paths depending upon the scale of phenomenon under investigation. Interest in the study of fatigue failure increased with the advent of industrial ization. Because of the urgent need to design against fatigue failure, early investiga tors focused on prototype testing and proposed failure criteria similar to design formulae. Thus, a methodology developed whereby the fatigue theories were proposed based on experimental observations, albeit at times with limited scope. This type of phenomenological approach progressed rapidly during the past four decades as closed-loop testing machines became available.
Download or read book Crack Sealing and Filling written by Jusang Lee and published by . This book was released on 2015-12-31 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This study investigated the current state of practice for crack sealing/filling. In addition, the INDOT crack sealing/filling practice was experimentally evaluated for the effectiveness of crack sealing/filling, the effectiveness of routing, the performance of the different types of crack sealants and fillers, the validity of sealant performance grade system, and the crack sealing/filling equipment performance. The key findings from an extensive literature review and nationwide/statewide survey performed in 2012 are the following: (1) 65% of the responses indicated that the routing is required for the crack sealing/filling application; (2) ASTM D 6690 Type II was the most widely used sealant type and only Missouri and Indiana included emulsions in their specifications as crack sealing/filling materials; and (3) crack sealing/filling equipment availability and their maintenance were the biggest concerns.Based on the two-year experimental investigation, the crack sealing/filling was determined to be effective in preventing the occurrence of pavement surface crack distress. The crack sealing/filling was concluded to be effective in maintaining crack integrity and resisting sealant and filler deformations due to the seasonal crack movement. The routing was not determined to be effective in terms of the pavement performances. However, Adhesive/Cohesive/Spalling (ACS) failure results showed that the routed sections significantly outperformed the non-routed sections. In addition, the test results indicated that the ASTM 6690 Type II crack sealants performed relatively well in terms of pavement and crack performance. The correlation between the sealant performance grades and the pavement and crack performances with different types of sealants and fillers were poor and insignificant.The experimental results showed that the cracks on wet pavement treated with HAL had significantly higher bonding between the materials and asphalt pavement surface than the cracks treated with the conventional air compressor. Therefore, the incorporation of a hot air lance in the wet condition is recommended to extend the operable time and seasonal availability for crack filling and sealing construction (2070 and 2090 Activities).
Download or read book The Virtual Crack Closure Technique History Approach and Applications written by Ronald Krueger and published by . This book was released on 2002 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: An overview of the virtual crack closure technique is presented. The approach used is discussed, the history summarized, and insight into its applications provided. Equations for two-dimensional quadrilateral elements with linear and quadratic shape functions are given. Formula for applying the technique in conjuction with three-dimensional solid elements as well as plate/shell elements are also provided. Necessary modifications for the use of the method with geometrically nonlinear finite element analysis and corrections required for elements at the crack tip with different lengths and widths are discussed. The problems associated with cracks or delaminations propagating between different materials are mentioned briefly, as well as a strategy to minimize these problems. Due to an increased interest in using a fracture mechanics based approach to assess the damage tolerance of composite structures in the design phase and during certification, the engineering problems selected as examples and given as references focus on the application of the technique to components made of composite materials.
Download or read book Filling and Sealing of Joints and Cracks in Concrete Pavements written by and published by . This book was released on 1953 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: The more important basic factors related to the filling and sealing of joint are summarized and discussed.
Download or read book Self healing Materials written by Swapan Kumar Ghosh and published by John Wiley & Sons. This book was released on 2009-08-04 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book covers self-healing concepts for all important material classes and their applications: polymers, ceramics, non-metallic and metallic coatings, alloys, nanocomposites, concretes and cements, as well as ionomers. Beginning with the inspiration from biological self-healing, its mimickry and conceptual transfer into approaches for the self-repair of artificially created materials, this book explains the strategies and mechanisms for the readers' basic understanding, then covers the different material classes and suitable self-healing concepts, giving examples for their application in practical situations. As the first book in this swiftly growing research field, it is of great interest to readers from many scientific and engineering disciplines, such as physics and chemistry, civil, architectural, mechanical, electronics and aerospace engineering.
Download or read book Analytical and Experimental Study of Near Threshold Interactions Between Crack Closure Mechanisms written by John A. Newman and published by . This book was released on 2003 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Closure written by Hilary Lawson and published by Routledge. This book was released on 2005-07-05 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: For over 2000 years our culture has believed in the possibility of a single true account of the world. Now this age is coming to a close. As a result there is a deep unease. We are lost both as individuals, and as a culture. In the new relativistic, post-modern era, we have no history, no right or moral action, and no body of knowledge. In their place is a plethora of alternative, and sometimes incompatible theories from 'fuzzy logic' to 'consilience' proposing a theory of everything. Closure is a response to this crisis. It is a radically new story about the nature of ourselves and of the world. Closure exposes the central questions of contemporary philosophy: language and meaning, of the individual and identity, of truth and reality, but it is also philosophical in the broader everyday sense that it enables us to make sense of where and who we are. A central principle, the process of closure, is shown to be at the heart of experience and language. As a theory of knowledge it has dramatic consequences for our understanding of the sciences, involving a reinterpretation of what science does and how it is able to do it. It similarly proposes a profound shift in the role of art and religion. But, above all, it reshapes our understanding of ourselves and the organisation of society, our goals and our capacity to achieve them. A superb new account of how order is created out of disorder, Closure is an exhilarating work of conceptual geography.
Download or read book Mechanisms and Mechanics of Fracture written by John Frederick Knott and published by Minerals, Metals, & Materials Society. This book was released on 2002 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: A valuable guide for researchers and industrial engineers in the study of fracture mechanics, as well as for individuals performing failure analysis. Scientists and engineers from around the world have contributed experimental and theoretical papers on the fracture of materials to provide comprehensive coverage of the complete range of fracture, from fundamentals to applications. This volume includes sections on fundamentals of fracture, fracture mechanics, probabilistic approaches to fracture, and advanced materials. It also includes coverage of brittle fracture, ductile fracture, fatigue, statistical approaches, advanced materials, and structural life prediction.
Download or read book Closures written by Grace Lavery and published by Duke University Press. This book was released on 2024-01-26 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: From The Mary Tyler Moore Show to Arrested Development to BoJack Horseman, the American sitcom revolves around crises that must be resolved by episode’s end, with a new crisis to come next week. In Closures, Grace Lavery reconsiders the genre’s seven-decade history as an endless cycle of crisis and closure that formally and representationally frames heterosexuality as constantly on the verge of both collapse and reconstitution. She shows that even the normiest family-based sitcoms rely on queer characters like Alice (The Brady Bunch) and Steve Urkel (Family Matters) who highlight how the family is perpetually incomplete and unstable. Analyzing the genre’s techniques and devices such as the laugh track and the cringe pan, Lavery also charts the shift to friend-group and workplace sitcoms like Friends and The Office, which she contends reflect a weakening of social ties in ways that place characters in an unending state of becoming. With this capacious yet svelte queer and trans theorization of the sitcom, Lavery demonstrates that the family ties that bind the genre’s normative heterosexuality are far more tenuous than we have been led to believe.
Download or read book Analysis of Fatigue Crack Closure and Thresholds written by K. Sadananda and published by . This book was released on 1995 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: A critical examination of fatigue crack closure concepts indicates that (a) procedures commonly followed in estimating crack closure are in error, (b) complete premature crack closure occurs only when cracks are completely filled with oxides or corrosion products, (d) such closure manifests as an infinite slope in the load-displacement (crack mouth opening) curves; rarely observed in experiments, (e) asperities cause only local closure, (f) their contribution is less significant than is assumed and (g) plasticity does not contribute to closure. New concepts are developed to explain fatigue phenomena hitherto attributed to crack closure. Implications of these concepts to understand fatigue crack growth are discussed.
Download or read book A Review of Crack Closure written by S. Banerjee and published by . This book was released on 1984 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fracture and Fracture Mechanics written by R. B. Tait and published by Elsevier. This book was released on 2013-10-22 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fracture and Fracture Mechanics: Case Studies contains the proceedings of the Second National Conference on Fracture, held at the University of the Witwatersrand in Johannesburg, South Africa on November 26-27, 1984. This book presents case studies in fracture and fracture mechanics and highlights the problems associated with fracture, failure analysis, and safe design in industries as diverse as mining, power generation, transport, petrochemical, and manufacturing. This book has 29 chapters divided into five sections and opens with a discussion on the role of professional complacency in bridge failures. The first section is devoted to failure investigation and covers topics ranging from failure analysis of a hydraulic retarder piston to the use of scanning electron microscopy in investigating tungsten carbide-cobalt fractured components. The second section deals with slow crack growth and considers an approach to assessing structural integrity and fatigue failures in vibrating equipment. Failures arising from repair welding and incomplete heat treatment are described. The remaining chapters explore fitness for purpose evaluation of fractures; the environmental effects of fractures; and case studies of failure prevention in industries such as petrochemical, power generation, and transportation. This monograph will be of interest to structural engineers, metallurgists, and materials scientists and technologists.
Download or read book Crack Sealing Methods and Materials for Flexible Pavements written by Michael C. Belangie and published by . This book was released on 1985 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study used over forty-four lane miles of test site to gather up to three years of comparative performance data on thirteen crack sealants. The data indicates that the more durable, high ductility materials when applied in a band-aid configuration can be expected to give significantly better performance than the lower ductility materials used by the Utah DOT prior to 1983. Evaluation of sealant placement procedures indicates that routing is a questionable practice, and that the hot compressed air lance may significantly improve the performance of materials placed during cold or wet conditions. Evaluation of UDOT maintenance activities indicates that sealant melters cannot achieve or maintain the required sealant application temperatures under colder winter conditions. The efficiency of melter units should be improved or not operated under those conditions. More accurate temperature gauges on melter units should be acquired. Inaccurate gauges may cause impaired sealant performance and safety.
Download or read book Fill The Cracks In My Soul With Poetry written by Cathy BLUE and published by Tulay Aslan. This book was released on with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt: If love is an insanity, then come, fill the cracks in my sould with poetry. Fill The Cracks In My Soul With Poetry You look at me, Wonder, how can I Write so much, Without a break, Non-stop? Boy, oh boy, I, Fill the cracks In my soul With poetry.
Download or read book Wear of Materials written by Peter J. Blau and published by Elsevier. This book was released on 2003-10 with total page 1540 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 14th International Conference on Wear of Materials took place in Washington, DC, USA, 30 March - 3 April 2003. These proceedings contain over two-hundred peer reviewed papers containing the best research, technical developments and engineering case studies from around the world. Biomaterials and nano-tribology receive special attention in this collection reflecting the general trends in the field. Further highlights include a focus on the new generation of instrumentation to probe wear at increasingly small scales. Approximately ninety communications and case studies, a popular format for the academic community have also been included, enabling the inclusion of the most up-to-date research. Over 200 peer-reviewed papers including hot topics such as biomaterials and nano-tribology Keeping you up-to-date with the latest research from leading experts Includes communications and case studies
Download or read book Pharmaceutical Packaging Technology written by D. A. Dean and published by CRC Press. This book was released on 2000-11-30 with total page 646 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pharmaceutical packaging requires a greater knowledge of materials and a greater intensity of testing than most other packed products, not to mention a sound knowledge of pharmaceutical products and an understanding of regulatory requirements. Structured to meet the needs of the global market, this volume provides an assessment of a wide range of i
