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Author: National Aeronautics and Space Administration (NASA) Publisher: Createspace Independent Publishing Platform ISBN: 9781720664659 Category : Languages : en Pages : 28
Book Description
A methodology is shown for predicting the time-dependent reliability of ceramic components against catastrophic rupture when subjected to transient thermomechanical loads (including cyclic loads). The methodology takes into account the changes in material response that can occur with temperature or time (i.e., changing fatigue and Weibull parameters with temperature or time). This capability has been added to the NASA CARES/Life (Ceramic Analysis and Reliability Evaluation of Structures/Life) code. The code has been modified to have the ability to interface with commercially available finite element analysis (FEA) codes executed for transient load histories. Examples are provided to demonstrate the features of the methodology as implemented in the CARES/Life program.Nemeth, Noel N. and Jadaan, Osama M. and Palfi, Tamas and Baker, Eric H.Glenn Research CenterMECHANICAL PROPERTIES; CERAMICS; TIME DEPENDENCE; TRANSIENT LOADS; STRUCTURAL ANALYSIS; CRACK PROPAGATION; FINITE ELEMENT METHOD; STRESS INTENSITY FACTORS
Author: National Aeronautics and Space Administration (NASA) Publisher: Createspace Independent Publishing Platform ISBN: 9781720664659 Category : Languages : en Pages : 28
Book Description
A methodology is shown for predicting the time-dependent reliability of ceramic components against catastrophic rupture when subjected to transient thermomechanical loads (including cyclic loads). The methodology takes into account the changes in material response that can occur with temperature or time (i.e., changing fatigue and Weibull parameters with temperature or time). This capability has been added to the NASA CARES/Life (Ceramic Analysis and Reliability Evaluation of Structures/Life) code. The code has been modified to have the ability to interface with commercially available finite element analysis (FEA) codes executed for transient load histories. Examples are provided to demonstrate the features of the methodology as implemented in the CARES/Life program.Nemeth, Noel N. and Jadaan, Osama M. and Palfi, Tamas and Baker, Eric H.Glenn Research CenterMECHANICAL PROPERTIES; CERAMICS; TIME DEPENDENCE; TRANSIENT LOADS; STRUCTURAL ANALYSIS; CRACK PROPAGATION; FINITE ELEMENT METHOD; STRESS INTENSITY FACTORS
Author: W. Steven Johnson Publisher: ASTM International ISBN: 9780803134782 Category : Technology & Engineering Languages : en Pages : 292
Book Description
As fatigue and fracture mechanics approaches are used more often for determining the useful life and/or inspection intervals for complex structures, realization sets-in that all factors are not well known or characterized. Indeed, inherent scatter exists in initial material quality and in material performance. Furthermore, projections of component usage in determination of applied stresses are inexact at best and are subject to much discrepancy between projected and actual usage. Even the models for predicting life contain inherent sources of error based on assumptions and/or empirically fitted parameters. All of these factors need to be accounted for to determine a distribution of potential lives based on combination of the aforementioned variables, as well as other factors. The purpose of this symposium was to create a forum for assessment of the state-of-the-art in incorporating these uncertainties and inherent scatter into systematic probabilistic methods for conducting life assessment.
Author: Manuel E. Brito Publisher: John Wiley & Sons ISBN: 0470291672 Category : Technology & Engineering Languages : en Pages : 398
Book Description
Over 40 papers are included in this volume from six symposia held during the 29th International Conference on Advanced Ceramics and Composites. Topics include ceramics and environmental applications, characterization tools for materials in extreme environments, functional nanomaterials, biomimetrics, carbon/carbon and ceramic composite materials in friction, multifunctional materials systems and reliability.
Author: Jonathan Salem Publisher: John Wiley & Sons ISBN: 9780470456330 Category : Technology & Engineering Languages : en Pages : 199
Book Description
This volume provides a one-stop resource, compiling current research on the behavior and reliability of ceramic macro and micro scale systems. It is a collection of papers from The American Ceramic Society s 32nd International Conference on Advanced Ceramics and Composites, January 27-February 1, 2008. Topics include Design and Testing Challenges for Ceramic Joints; Structural Design, Testing and Life Prediction of Monolithic and Composite Components; Mechanical Behavior, Design, and Reliability of Small Scale Systems; Environmental Effects on Mechanical Properties; and more. This is a valuable reference for researchers in ceramics engineering.
Author: R.C. Bradt Publisher: Springer Science & Business Media ISBN: 0387289208 Category : Technology & Engineering Languages : en Pages : 621
Book Description
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.
Author: National Aeronautics and Space Administration (NASA)
Author: National Aeronautics and Space Administration (NASA)
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Author: 
Author: W. Steven Johnson
Author: Manuel E. Brito
Author: S. F. Duffy
Author: Jonathan Salem
Author: R.C. Bradt
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Author: