Download or read book Modeling Crack Growth Resistance in Ceramics and Ceramic Matrix Composites written by J. LLorca and published by . This book was released on 1992 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Crack growth resistance in ceramics and ceramic-matrix composites at ambient temperature is provided mainly by the interaction between the crack surfaces in the crack wake. A cohesive crack model is presented to study the fracture behavior of these materials. The constitutive equation for the cohesive crack is obtained through micromechanical considerations and experimental observations in the crack wake. The model predictions show good agreement with experimental results in one monolithic ceramic (alumina) and two fibeoreinforced ceramic-matrix composites. The applications and limitations of the model are discussed.
Download or read book Cyclic Deformation Fracture and Nondestructive Evaluation of Advanced Materials written by Michael R. Mitchell and published by ASTM International. This book was released on 1992 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fracture Mechanics of Ceramics written by Richard Carl Bradt and published by . This book was released on 1974 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Local global Modeling of Crack Growth in Continuously Reinforced Ceramic Matrix Composites written by Sk. Shamim Ahmed and published by . This book was released on 1989 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fracture Mechanics of Ceramics written by R.C. Bradt and published by Springer Science & Business Media. This book was released on 2010-01-11 with total page 621 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 8th International Symposium on fracture mechanics of ceramics was held in on the campus of the University of Houston, Houston, TX, USA, on February 25-28, 2003. With the natural maturing of the fields of structural ceramics, this symposium focused on nano-scale materials, composites, thin films and coatings as well as glass. The symposium also addressed new issues on fundamentals of fracture mechanics and contact mechanics, and a session on reliability and standardization.
Download or read book Fracture Mechanics of Ceramics written by R.C. Bradt and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 591 pages. Available in PDF, EPUB and Kindle. Book excerpt: Second part of the proceedings of the Sixth International Symposium held in Karlsruhe, Germany, July 18-20, 1995.
Download or read book Ceramic matrix composites and other systems written by Antonio Miravete and published by Woodhead Publishing. This book was released on 1993 with total page 924 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Micromechanisms of Cyclic and Environmentally Assisted Subcritical Crack Growth in Ceramic Matrix Composites written by and published by . This book was released on 1991 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt: The future use of ceramics for advanced structural applications represents an important precursor to potential major improvements in design performance for high temperature, corrosion and wear resistance applications. The limited use of such brittle materials to date has primarily been attributed to their inherently low toughness and lack of defect tolerance. Scientific research in the last decade, however, has resulted in major advances in the toughening of ceramics by such mechanisms as whisker reinforcement, transformation and microcrack toughening. However, very recent work has shown that such toughened ceramics and composites, contrary to conventional wisdom, may become susceptible to cyclic fatigue. The intent of this program was to study and model the physics and fundamental micromechanisms of environmentally- assisted and principally cyclic fatigue crack-growth processes in several classes of ceramic-matrix composites, chosen to reflect different primary toughening mechanisms. Based on initial studies, the central hypothesis of this work is that the mechanisms of crack-tip shielding, used to enhance fracture toughness, can lead to degradation in crack-growth resistance under cyclic loading. Cyclic Fatigue, Fracture Toughness, Subcritical Crack Growth, Ceramic Matrix Composites, Small Cracks.
Download or read book Damage Fracture and Fatigue of Ceramic Matrix Composites written by Longbiao Li and published by Springer. This book was released on 2018-08-27 with total page 249 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the damage, fracture and fatigue of ceramic-matrix composites. It investigates tensile damage and fracture, fatigue hysteresis, and the properties of interfaces subjected to cyclic fatigue loading. Further, it predicts fatigue life at room and elevated temperatures using newly developed damage models and methods, and it analyzes and compares damage, fracture and fatigue behavior of different fiber performs: unidirectional, cross-ply, 2D and 2.5D woven. The developed models and methods can be used to predict the damage and lifetime of ceramic-matrix composites during applications on hot section components.Ceramic-matrix composites (CMCs) are high-temperature structural materials with the significant advantages of high specific strength, high specific modulus, high temperature resistance and good thermal stability, which play a crucial role in the development of high thrust weight ratio aero engines. The critical nature of the application of these advanced materials makes comprehensive characterization a necessity, and as such this book provides designers with essential information pertaining not only to the strength of the materials, but also to their fatigue and damage characteristics.
Download or read book Advances in Ceramic Matrix Composites VIII written by J. P. Singh and published by John Wiley & Sons. This book was released on 2012-04-11 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ceramic composites are leading candidate materials for high-temperature structural applications. This new book updates readers on the latest in state-of-the-art ceramic composite processing and fabrication methods, process modeling, processing-microstructure-property relationships, mechanical behavior, and characterization. Many of the most important aspects necessary for the understanding and further development of ceramic composites is covered in this volume. It will be of great interest to the technical community involved in advanced ceramic composite processing, characterization, component development, and manufacturing. Proceedings of the symposium held at the 104th Annual Meeting of The American Ceramic Society, April 28-May1, 2002 in Missouri; Ceramic Transactions, Volume 139.
Download or read book Fatigue Crack Growth in Ceramics and Ceramic Matrix Composites written by NE. Ashbaugh and published by . This book was released on 1992 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reliable design of ceramic matrix composite components in aerospace applications requires the knowledge of the crack propagation behavior of these materials at elevated temperatures. The first part of this paper discusses a test setup using a centrally notched disk to conduct mechanical fatigue crack growth testing of brittle matrices used in these composites. The specimen compliance is monitored using the laser interferometric displacement gage system. To evaluate this fatigue crack growth test setup, cyclic crack propagation is studied in an alumina ceramic specimen. Transmission electron microscopy of surface replicates show evidence of irreversible microcracking at the crack tip that could provide the mechanism for fatigue crack growth in this ceramic. The second part of this paper discusses the results from automated fatigue crack growth tests on silicon-carbide fiber-reinforced aluminosilicate glass matrix composites at room and elevated temperatures using the compact tension geometry. Tests conducted at room temperature indicate high damage tolerance in these composites due to energy dissipation through distributed matrix cracking around the tip, fiber bridging, and fiber pull out. In contrast, tests at 650°C reveal Mode 1 self-similar crack growth in these composites and absence of fiber pullout.
Download or read book Fracture Mechanics of Ceramics written by M. Sakai and published by Springer Science & Business Media. This book was released on 1992 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volumes 9 and 10 (see following entry) comprise the proceedings of an international symposium on the fracture mechanics of ceramic materials held in Nagoya, Japan, July 1991. Scientists address many of the theoretical and practical issues of brittle fractures and explore recent developments in monol
Download or read book Advanced Ceramic Matrix Composites written by Edward R. Generazio and published by CRC Press. This book was released on 1995-12-14 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced ceramic composites are the focus of intense research and development today because these materials offer a unique mix of properties that make them useful and economical for major engineering applications. As part of this R&D effort, new tools for characterization, evaluation and testing have been developed and are in current use. This book brings together leading materials researchers to report on these developments. In-depth reports cover evaluation and test methods as they relate to the design of specific advanced ceramic composite materials and their applications. The reports are supplemented with extensive test result data and illustrated with numerous micrographs and schematics.
Download or read book Toughening Mechanisms in Quasi Brittle Materials written by S.P. Shah and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt: A variety of ceramic materials has been recently shown to exhibit nonlinear stress strain behavior. These materials include transformation-toughened zirconia which undergoes a stress-induced crystallographic transformation in the vicinity of a propagating crack, microcracking ceramics, and ceramic-fiber reinforced ceramic matrices. Since many of these materials are under consideration for structural applications, understanding fracture in these quasi-brittle materials is essential. Portland cement concrete is a relatively brittle material. As a result mechanical behavior of concrete, conventionally reinforced concrete, prestressed concrete and fiber reinforced concrete is critically influenced by crack propagation. Crack propagation in concrete is characterized by a fracture process zone, microcracking, and aggregate bridging. Such phenomena give concrete toughening mechanisms, and as a result, the macroscopic response of concrete can be characterized as that of a quasi-brittle material. To design super high performance cement composites, it is essential to understand the complex fracture processes in concrete. A wide range of concern in design involves fracture in rock masses and rock structures. For example, prediction of the extension or initiation of fracture is important in: 1) the design of caverns (such as underground nuclear waste isolation) subjected to earthquake shaking or explosions, 2) the production of geothermal and petroleum energy, and 3) predicting and monitoring earthquakes. Depending upon the grain size and mineralogical composition, rock may also exhibit characteristics of quasi-brittle materials.
Download or read book Nonlinear Behavior of Ceramic Matrix Composites written by Longbiao Li and published by Woodhead Publishing. This book was released on 2021-08-17 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nonlinear Damage Behavior of Ceramic Matrix Composites help readers [researchers, material scientists and design engineers] gain greater understanding on the damage mechanisms inside CMCs so they can better design components used in aeronautics and astronautics. Key areas addressed in the book include: the nonlinear damage behavior of ceramic-matrix composites, including damage mechanisms and models, nonlinear damage behavior of ceramic-matrix composites under tensile and fatigue loading, strain-rate dependent, stochastic loading dependent, and time dependent nonlinear damage behavior, and the effect of pre-exposure and thermal fatigue on non-linear damage behavior of ceramic-matrix composites. Provides comprehensive coverage on damage mechanisms and models under tensile and cyclic fatigue loading which ultimately control nonlinear behavior Covers nonlinear damage analyses of CMC components and experimental observations of damage evolution Presents extensive knowledge on fracture mechanic principles used in the design of aerospace propulsion systems
Download or read book Matrix Cracking in Ceramic Matrix Composites written by Longbiao Li and published by Springer Nature. This book was released on 2022-03-12 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the matrix cracking behavior in ceramic–matrix composites (CMCs), including first matrix cracking behavior, matrix cracking evolution behavior, matrix crack opening and closure behavior considering temperature and oxidation. The micro-damage mechanisms are analyzed, and the micromechanical damage models are developed to characterize the cracking behavior. Experimental matrix cracking behavior of different CMCs at room and elevated temperatures is predicted. The book can help the material scientists and engineering designers to better understand the cracking behavior in CMCs.
Download or read book Crack growth Resistance in Reinforced Ceramic Composites written by David Michael Stump and published by . This book was released on 1989 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:
