Design, Fabrication, and Burner Rig Testing of Three-Dimensional Woven Ceramic Matrix Composite Flanged Hoop Subelements PDF Download
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Author: P. Khandelwal Publisher: ISBN: Category : Ceramic matrix composite Languages : en Pages : 15
Book Description
Ceramic matrix composites (CMCs) have been identified as a key material system for improving the thrust-to-weight ratio of high-performance aircraft engines. An interturbine flow-path duct for a high-performance engine has been identified as a component with the potential for 100% reduction in active cooling air and 80% reduction in weight through the use of CMC material systems. To reduce risk prior to incorporating the interturbine duct in a high-performance engine, a CMC subelement design was conducted, parts were fabricated from two potential CMC material systems, and tests were conducted in a National Aeronautics and Space Administration (NASA) high-temperature, high-pressure burner rig with parameters representative of the high-performance engine environment. The burner rig testing verified the mechanical attachment and flow path sealing techniques as well as distinguished the oxidative stability of the two CMC material systems tested. After the burner rig testing was completed, the successful subelements were laser cut into three continuous hoop configurations and tested at room temperature for hoop retained tensile strength. The retained strength test results as well as fractography work indicated the need for regional architecture modifications as well as improved methods of infiltrating the fiber tows with oxidation inhibitors.
Author: P. Khandelwal Publisher: ISBN: Category : Ceramic matrix composite Languages : en Pages : 15
Book Description
Ceramic matrix composites (CMCs) have been identified as a key material system for improving the thrust-to-weight ratio of high-performance aircraft engines. An interturbine flow-path duct for a high-performance engine has been identified as a component with the potential for 100% reduction in active cooling air and 80% reduction in weight through the use of CMC material systems. To reduce risk prior to incorporating the interturbine duct in a high-performance engine, a CMC subelement design was conducted, parts were fabricated from two potential CMC material systems, and tests were conducted in a National Aeronautics and Space Administration (NASA) high-temperature, high-pressure burner rig with parameters representative of the high-performance engine environment. The burner rig testing verified the mechanical attachment and flow path sealing techniques as well as distinguished the oxidative stability of the two CMC material systems tested. After the burner rig testing was completed, the successful subelements were laser cut into three continuous hoop configurations and tested at room temperature for hoop retained tensile strength. The retained strength test results as well as fractography work indicated the need for regional architecture modifications as well as improved methods of infiltrating the fiber tows with oxidation inhibitors.
Author: Ramesh Agarwal Publisher: John Wiley & Sons ISBN: 1118866355 Category : Technology & Engineering Languages : en Pages : 528
Book Description
Green Aviation is the first authoritative overview of both engineering and operational measures to mitigate the environmental impact of aviation. It addresses the current status of measures to reduce the environmental impact of air travel. The chapters cover such items as: Engineering and technology-related subjects (aerodynamics, engines, fuels, structures, etc.), Operations (air traffic management and infrastructure) Policy and regulatory aspects regarding atmospheric and noise pollution. With contributions from leading experts, this volume is intended to be a valuable addition, and useful resource, for aerospace manufacturers and suppliers, governmental and industrial aerospace research establishments, airline and aviation industries, university engineering and science departments, and industry analysts, consultants, and researchers.
Author: Lorena Pardo Publisher: Springer Science & Business Media ISBN: 9048128757 Category : Technology & Engineering Languages : en Pages : 847
Book Description
This book presents selected topics on processing and properties of ferroelectric materials that are currently the focus of attention in scientific and technical research. Ferro-piezoelectric ceramics are key materials in devices for many applications, such as automotive, healthcare and non-destructive testing. As they are polycrystalline, non-centrosymmetric materials, their piezoelectricity is induced by the so-called poling process. This is based on the principle of polarization reversal by the action of an electric field that characterizes the ferroelectric materials. This book was born with the aim of increasing the awareness of the multifunctionality of ferroelectric materials among different communities, such as researchers, electronic engineers, end-users and manufacturers, working on and with ferro-piezoelectric ceramic materials and devices which are based on them. The initiative to write this book comes from a well-established group of researchers at the Laboratories of Ferroelectric Materials, Materials Science Institute of Madrid (ICMM-CSIC). This group has been working in different areas concerning thin films and bulk ceramic materials since the mid-1980s. It is a partner of the Network of Excellence on Multifunctional and Integrated Piezoelectric Devices (MIND) of the EC, in which the European Institute of Piezoelectric Materials and Devices has its origin.
Author: Publisher: ISBN: Category : Languages : en Pages : 64
Book Description
The interaction between long rods and ceramics is only partially understood; however, this understanding is essential in the design of improved performance of impact-resistant materials and armor system design applications. The current work takes a preliminary look into the modem mythology surrounding the formation of radial cracking in ceramics during ballistic penetration. Tests were conducted using a 32-g tungsten alloy laboratory penetrator with a length to diameter ratio (L/D) = 20 at a nominal impact velocity of 1,600 m/s. Testing evaluated both prestressed and unstressed titanium diboride (TiB2) ceramic tiles. Evaluation of the damage included microstructural analysis using a scanning electron microscope (SEM) with a Robinson backscatter detector for surface structure, the x-ray computed tomography (CT) nondestructive technique to completely scan the interior of each disk, and limited analytical modeling of the stress state.
Author: P. Khandelwal
Author: P. Khandelwal
Author: Michael G. Jenkins
Author: 
Author: Ramesh Agarwal
Author: 
Author: Lewis Research Center
Author: Lorena Pardo
Author: Erian A. Armanios
Author: 
Author: John C. Evvard