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Aspects Of High Temperature Damage In Fiber Reinforced Titanium Metal Matrix Composites
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Book Synopsis Aspects of High Temperature Damage in Fiber Reinforced Titanium Metal Matrix Composites by :
Download or read book Aspects of High Temperature Damage in Fiber Reinforced Titanium Metal Matrix Composites written by and published by . This book was released on 1993 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aspects associated with high temperature damage in fiber reinforced Metal Matrix Composites were investigated and are presented in this report in the form of five separate sections. In the first section, the fatigue and fatigue crack growth characteristics in neat laminates made of Timetal 21S were studied in relation to both temperature and loading frequency effects. The second section deals with the evolution of the thermal residual stresses in the composite when cooling from consolidation temperature or subjecting the composite to then-nal cycles. A new mechanical simulation method capable of measuring the induced residual stress on real; time basis has been developed in this study. The third section extends this issue to the time-dependent internal stress and strain states of MMCs under the thermomechanical loading conditions. Here, a new micromechanical model employing the four-phase concentric cylinder configuration has been proposed. Based on this model, the time-dependent behavior of continuous fiber reinforced metal matrix composites has been evaluated for the SCS-6/Timetal 21S composite. These results are presented in the fourth section. The last section of this report deals with the high temperature fatigue crack growth characteristics of the continuous fiber reinforced titanium metal matrix composite sigma l240/Timetal 12IS. The time- dependent features of the crack growth was examined in relation to the variation of both testing temperature and loading frequency. the principal damage mechanism of this composite under the load condition employed was identified to be the crack bridging and fiber/matrix debonding confined to regions near the crack surfaces ... Bridging, Fiber pullout length, Viscoplasticity, Composite interface.
Book Synopsis Durability and Damage Tolerance of High Temperature Advanced Titanium Metal Matrix Composites by :
Download or read book Durability and Damage Tolerance of High Temperature Advanced Titanium Metal Matrix Composites written by and published by . This book was released on 2000 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: The bridging fatigue crack growth damage mechanisms in a unidirectional SiC/Ti MMC include matrix cracking, fiber/matrix interface debonding and sliding along bridging fibers and fracture of these fibers. The basic components of these mechanisms are examined in this program. The evolution features of residual stresses indicated that stress relaxation occurred in the Ti matrix phase of the composite following post-fabrication cool down to 600 00. Parametric study of the SiC fiber coating materials showed that the effective residual stress component has an inverse relationship with the thickness of the fiber reaction zone. The debonding shear strength of the composite is determined by the localized shear stress distribution along the fiber/matrix interface at the onset of debonding. An interphase debonding model, which combine fracture mechanics with FE results on interphase shear stress and bridging fiber traction range, is proposed to establish a distribution of debonding lengths along a fiber-bridged matrix crack length as a function of temperature. The driving force for the interface debond crack, however, has an inverse relationship with the test temperature. The concurrent damage events of fiber stress evolution and continuous fiber strength degradation were postulated into a fiber fracture criterion to describe the fracture process of a bridging fiber. Furthermore, the fiber crack density has been correlated with the density of crack initiation sites observed in the interphase region along the reinforcing fibers in a SCS-6/Ti-21S composite.
Book Synopsis Titanium Matrix Composites by : Shankar Mall
Download or read book Titanium Matrix Composites written by Shankar Mall and published by CRC Press. This book was released on 2020-01-29 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt: A review and summary of advancements related to mechanical behavior and related mechanics issues of titanium matrix composites (TMCs), a class of high-temperature materials useful in the propulsion and airframe components in advanced aerospace systems. After an introduction to TMCs, different authors review and summarise the advancements related to mechanical behavior and related mechanics issues of TMCs.
Book Synopsis Fatigue Damage Growth Mechanisms in Continuous Fiber Reinforced Titanium Matrix Composites by :
Download or read book Fatigue Damage Growth Mechanisms in Continuous Fiber Reinforced Titanium Matrix Composites written by and published by . This book was released on 1990 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis High-Temperature Interphase Properties of SiC Fiber Reinforced Titanium Metal Matrix Composites by :
Download or read book High-Temperature Interphase Properties of SiC Fiber Reinforced Titanium Metal Matrix Composites written by and published by . This book was released on 1996 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study has been carried out to determine the high temperature interfacial properties of two titanium metal matrix composites: SCS-6/Timetal-21S and SM1240/Timetal-21S. This report focusses on the effect of temperature on the interfacial shear strength and frictional shear stress of the fiber/matrix interphase. These properties are quantified through the use of 'thin slice' fiber pushout tests, and the numerical determination of residual stresses in the composite system. We discusses the elevated temperature fiber pushout apparatus built for use in this study. Chapter 2 and 3 deal with two aspects of elevated temperature influence: thermal aging and test temperature. The effect of aging on the size and composition of the fiber/matrix interphase is investigated using Scanning Electron Microscopy and Auger Electron Spectroscopy. The experimental work discussed in Chapter 2 relates to samples which were aged at high temperature in air, then cut to the appropriate size. The pushout experiments were conducted at room temperature in an air environment. Chapter 3 focusses on specimens which were aged at high temperature in a vacuum environment, as well as unaged samples. The pushout tests described in this section were conducted either at room and elevated temperatures in both air and vacuum conditions. Chapter 4 examines the influence of process related residual stress on the shear strength of the fiber/matrix interphase using a combined experiment/numerical approach.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Damage Development in Titanium Metal Matrix Composites Subjected to Cyclic Loading by :
Download or read book Damage Development in Titanium Metal Matrix Composites Subjected to Cyclic Loading written by and published by . This book was released on 1992 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fatigue Crack Growth Mechanisms in Titanium Metal Matrix Composites by :
Download or read book Fatigue Crack Growth Mechanisms in Titanium Metal Matrix Composites written by and published by . This book was released on 1996 with total page 237 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report details studies carried out to identify the high temperature fatigue crack growth damage mechanisms in fiber-reinforced titanium metal matrix composites. The report consists of eight separate sections. In the first section, the fatigue and fatigue crack growth characteristics in neat laminates made of Timetal 21S were studied in relation to both temperature and loading frequency effects. The second section deals with the evolution of the thermal residual stresses in the composite when cooling from consolidation temperature or subjecting the composite to thermal cycles. A new mechanical simulation method capable of measuring the induced residual stress on real time basis has been developed in this study. The third section extends this issue to the time-dependent internal stress and strain states of MMCs under the thermomechanical loading conditions. Here, a new micromechanical model employing the four-phase concentric cylinder configuration has been proposed. Based on this model, the time-dependent behavior of continuous fiber reinforced metal matrix composites. It has been evaluated. These results are presented in the fourth section. The fifth, sixth and seventh sections of this report describe the influence of temperature and loading frequency on the crack growth process and suggest a fatigue-creep interactive mechanism acting at the crack tip during high temperature loadings. The last section of the report deals with the determination of the stress evolution in bridging fibers during the fatigue crack growth in SM 1240/Timetal-21S composite using the finite element method. Several parameters affecting this evolution were considered; namely, the process-induced residual stress, the creep characteristics of the matrix layer surrounding the fiber, the test temperature and the loading frequency.
Book Synopsis Elevated Temperature Tensile and Creep Behavior of a SiC Fiber-reinforced Titanium Metal Matrix Composite by : Rita Janelle Thurston
Download or read book Elevated Temperature Tensile and Creep Behavior of a SiC Fiber-reinforced Titanium Metal Matrix Composite written by Rita Janelle Thurston and published by . This book was released on 1993 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Technical Memorandum written by and published by . This book was released on 1994 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Monthly Catalog of United States Government Publications by :
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1994 with total page 1282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Monthly Catalogue, United States Public Documents by :
Download or read book Monthly Catalogue, United States Public Documents written by and published by . This book was released on 1994 with total page 1284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Overview of Elevated Temperature Damage Mechanisms and Fatigue Behavior of a Unidirectional SCS-6/Ti-15-3 Composite by : Michael G. Castelli
Download or read book An Overview of Elevated Temperature Damage Mechanisms and Fatigue Behavior of a Unidirectional SCS-6/Ti-15-3 Composite written by Michael G. Castelli and published by . This book was released on 1993 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Metal Matrix Composites by : W. Steven Johnson
Download or read book Metal Matrix Composites written by W. Steven Johnson and published by ASTM International. This book was released on 1989 with total page 289 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fourteen peer-reviewed papers on testing techniques, analysis approaches, and descriptions of various failure processes. From the Symposium on [title] held at Sparks, NV, April 1988. Annotation copyright Book News, Inc. Portland, Or.
Download or read book Engine Structures written by and published by . This book was released on 1988 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1991 with total page 1380 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Damage Initiation and Growth in Fiber Reinforced Metal Matrix Composites by : D. Harmon
Download or read book Damage Initiation and Growth in Fiber Reinforced Metal Matrix Composites written by D. Harmon and published by . This book was released on 1989 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Elevated temperature applications for advanced fighters and hypersonic vehicles, along with advanced fabrication techniques, such as diffusion bonding and superplastic forming, have brought renewed interest in metal matrix composites for aircraft structures. In order to predict the strength and durability of metal matrix structures, it will be necessary to predict the mode in which failure occurs, such as net section failure, shear along the fiber, or other modes. Test and analysis results demonstrate the differences between strength and fatigue failure modes of uni-directionally reinforced aluminum matrix composites (AMC) and those in titanium matrix composites (TMC). These tests include detailed optical and scanning electron microscope studies of failures in aluminum and titanium matrix composites.
