Modeling And Life Prediction Methodology For Titanium Matrix Composites Subjected To Mission Profiles
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Modeling And Life Prediction Methodology For Titanium Matrix Composites Subjected To Mission Profiles
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Author : National Aeronautics and Space Adm Nasa
language : en
Publisher:
Release Date : 2018-10-20
Modeling And Life Prediction Methodology For Titanium Matrix Composites Subjected To Mission Profiles written by National Aeronautics and Space Adm Nasa and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-10-20 with categories.
Titanium matrix composites (TMC) are being evaluated as structural materials for elevated temperature applications in future generation hypersonic vehicles. In such applications, TMC components are subjected to complex thermomechanical loading profiles at various elevated temperatures. Therefore, thermomechanical fatigue (TMF) testing, using a simulated mission profile, is essential for evaluation and development of life prediction methodologies. The objective of the research presented in this paper was to evaluate the TMF response of the (0/90)2s SCS-6/Timetal-21S subjected to a generic hypersonic flight profile and its portions with a temperature ranging from -130 C to 816 C. It was found that the composite modulus, prior to rapid degradation, had consistent values for all the profiles tested. A micromechanics based analysis was used to predict the stress-strain response of the laminate and of the constituents in each ply during thermomechanical loading conditions by using only constituent properties as input. The fiber was modeled as elastic with transverse orthotropic and temperature dependent properties. The matrix was modeled using a thermoviscoplastic constitutive relation. In the analysis, the composite modulus degradation was assumed to result from matrix cracking and was modeled by reducing the matrix modulus. Fatigue lives of the composite subjected to the complex generic hypersonic flight profile were well correlated using the predicted stress in 0 degree fibers. Mirdamadi, M. and Johnson, W. S. Langley Research Center RTOP 505-63-50-04...
Modeling And Life Prediction Methodology For Titanium Matrix Composites Subjected To Mission Profiles
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Author : M. Mirdamadi
language : en
Publisher:
Release Date : 1994
Modeling And Life Prediction Methodology For Titanium Matrix Composites Subjected To Mission Profiles written by M. Mirdamadi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with categories.
Life Prediction Methodology For Titanium Matrix Composites
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Author : W. Steven Johnson
language : en
Publisher: ASTM International
Release Date : 1996
Life Prediction Methodology For Titanium Matrix Composites written by W. Steven Johnson and has been published by ASTM International this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Metallic composites categories.
Papers presented at the March 1994 symposium are organized into five sections that progress from basic understanding of mechanical damage mechanisms and environmental effects to life prediction methodology. Five papers discuss the interplay between interfacial strength, residual thermal stresses, an
A Comparison Of Life Prediction Methodologies For Titanium Matrix Composites Subjected To Thermomechanical Fatigue
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Author : Calcaterra, JR.
language : en
Publisher:
Release Date : 1997
A Comparison Of Life Prediction Methodologies For Titanium Matrix Composites Subjected To Thermomechanical Fatigue written by Calcaterra, JR. and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Composite materials categories.
Several methodologies have been developed to predict the lives of titanium matrix composites (TMCs) subjected to thermomechanical fatigue (TMF). This paper reviews and compares five life prediction models developed at NASA-LaRC, Wright Laboratories, and Clarkson University. The models developed at NASA-LaRC and Clarkson University are based on a single parameter, the fiber stress in the load-carrying, or 0°, direction. The two other models, both developed at Wright Labs, are multi-parameter models. These can account for long-term damage, which is beyond the scope of the single-parameter models, but this benefit is offset by the additional complexity of the methodologies. Each of the methodologies was used to model data generated at NASA-LeRC, Wright Labs, and Georgia Tech for the SCS-6/Timetal 21-S material system. Viscoply, a micromechanical stress analysis code, was used to determine the constituent stress state for each test and was used for each model to maintain consistency. The predictive capabilities of the models are compared, and the ability of each model to accurately predict the responses of tests dominated by differing damage mechanisms is addressed.
Titanium Matrix Composites
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Author : Shankar Mall
language : en
Publisher: CRC Press
Release Date : 2020-01-29
Titanium Matrix Composites written by Shankar Mall and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-01-29 with Technology & Engineering categories.
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.
Fatigue Life Prediction Of Titanium Matrix Composites Under Mission Spectrum Loading
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Author : T. Nicholas
language : en
Publisher:
Release Date : 1998
Fatigue Life Prediction Of Titanium Matrix Composites Under Mission Spectrum Loading written by T. Nicholas and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Automotive medicine categories.
Fatigue life predictions are conducted for a high temperature composite for hypersonic vehicle structural applications. A SCS-6/Timetal® 21S [0/90]s composite is evaluated under thermomechanical fatigue (TMF) as well as under typical hypersonic mission profiles and segments of those missions. The fatigue life analysis is based on micromechanical stresses which, in turn, are input into a damage summation model. Spectrum loading is decomposed into a series of in-phase and out-of-phase TMF segments whose lives are predicted from a life fraction model which was developed for isothermal and TMF data. Analytical predictions for the mission spectrum and the simple mission profiles are compared with experimental data obtained here as well as in a previous study. The model is demonstrated to be able to predict fatigue life under mission spectrum loading based solely on calibration under simple isothermal fatigue and TMF conditions.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1995
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Aeronautics categories.
Star
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Author :
language : en
Publisher:
Release Date : 1973
Star written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1973 with Aeronautics categories.
Nasa Technical Memorandum
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Author :
language : en
Publisher:
Release Date : 1994
Nasa Technical Memorandum written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Aeronautics categories.
Advances In Fatigue Lifetime Predictive Techniques
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Author :
language : en
Publisher:
Release Date : 1996
Advances In Fatigue Lifetime Predictive Techniques written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Fracture mechanics categories.