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There are a total of 67 record(s) matching your query.
Sorted by: Date Added To NTRS in Descending order
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Reliability and Creep/Fatigue Analysis of a CMC Component
Author(s): Murthy, Pappu L. N.; Mital, Subodh K.; Gyekenyesi, John Z.; Gyekenyesi, John P.
Abstract: High temperature ceramic matrix composites (CMC) are being explored as viable candidate materials for hot section gas turbine components. These advanced composites can potentially lead to reduced weight and enable higher ...
NASA Center: Glenn Research Center
Publication Year: 2007
Added to NTRS: 2008-03-01
Document ID: 20080001453; Report Number: E-16136, NASA/TM-2007-214975
Micromechanics Based Design/Analysis Codes for Advanced Composites
Author(s): Mital, Subodh K.; Murthy, Pappu L. N.; Gyekenyesi, John P.
Abstract: Advanced high temperature Ceramic Matrix Composites (CMC) hold an enormous potential for use in aero and space related applications specifically for propulsion system components. Consequently, this has led to a multitude of ...
NASA Center: Glenn Research Center
Publication Year: 2002
Added to NTRS: 2007-11-27
Document ID: 20020073462
Effect of Projectile Materials on Foreign Object Damage of a Gas-Turbine Grade Silicon Nitride
Author(s): Choi, Sung R.; Racz, Zsolt; Bhatt, Ramakrishna T.; Brewer, David N.; Gyekenyesi, John P.
Abstract: Foreign object damage (FOD) behavior of AS800 silicon nitride was determined using four different projectile materials at ambient temperature. The target test specimens rigidly supported were impacted at their centers by ...
NASA Center: Glenn Research Center
Publication Year: 2005
Added to NTRS: 2007-05-09
Document ID: 20060019250; Report Number: GT2005-68866
Assessments of Fracture Toughness of Monolithic Ceramics-SEPB Versus SEVNB Methods
Author(s): Choi, Sung R.; Gyekenyesi, John P.
Abstract: Fracture toughness of a total of 13 advanced monolithic ceramics including silicon nitrides, silicon carbide, aluminas, and glass ceramic was determined at ambient temperature by using both single edge precracked beam (SEPB) ...
NASA Center: Glenn Research Center
Publication Year: 2006
Added to NTRS: 2006-08-02
Document ID: 20060007571; Report Number: E-15427, NASA/TM-2006-214090
Lifetime Reliability Prediction of Ceramic Structures Under Transient Thermomechanical Loads
Author(s): Nemeth, Noel N.; Gyekenyesi, John P.; Jadaan, Osama M.
Abstract: An analytical methodology is developed to predict the probability of survival (reliability) of ceramic components subjected to harsh thermomechanical loads that can vary with time (transient reliability analysis). This ...
NASA Center: Glenn Research Center
Publication Year: 2005
Added to NTRS: 2005-11-17
Document ID: 20050237907; Report Number: E-14061, NASA/TP-2005-212505
Fracture mechanics concepts in reliability analysis of monolithic ceramics
Author(s): Manderscheid, Jane M.; Gyekenyesi, John P.
Abstract: Basic design concepts for high-performance, monolithic ceramic structural components are addressed. The design of brittle ceramics differs from that of ductile metals because of the inability of ceramic materials to ...
NASA Center: Glenn Research Center
Publication Year: 1987
Added to NTRS: 2005-10-13
Accession Number: 87N27269; Document ID: 19870017836; Report Number: E-3743, NAS 1.15:100174, NASA-TM-100174
Surface flaw reliability analysis of ceramic components with the SCARE finite element postprocessor program
Author(s): Gyekenyesi, John P.; Nemeth, Noel N.
Abstract: The SCARE (Structural Ceramics Analysis and Reliability Evaluation) computer program on statistical fast fracture reliability analysis with quadratic elements for volume distributed imperfections is enhanced to include the ...
NASA Center: Glenn Research Center
Publication Year: 1987
Added to NTRS: 2005-10-13
Accession Number: 87N17087; Document ID: 19870007654; Report Number: E-3229, NAS 1.15:88901, NASA-TM-88901
Basis And Application Of The CARES/LIFE Computer Program
Author(s): Nemeth, Noel N.; Janosik, Lesley A.; Gyekenyesi, John P.; Powers, Lynn M.
Abstract: Report discusses physical and mathematical basis of Ceramics Analysis and Reliability Evaluation of Structures LIFE prediction (CARES/LIFE) computer program, described in "Program for Evaluation of Reliability of Ceramic ...
NASA Center: Glenn Research Center
Publication Year: 1996
Added to NTRS: 2005-09-30
Accession Number: 96B10144; Document ID: 19960018839; Report Number: LEW-16207
CARES/LIFE Ceramics Analysis and Reliability Evaluation of Structures Life Prediction Program
Author(s): Nemeth, Noel N.; Powers, Lynn M.; Janosik, Lesley A.; Gyekenyesi, John P.
Abstract: This manual describes the Ceramics Analysis and Reliability Evaluation of Structures Life Prediction (CARES/LIFE) computer program. The program calculates the time-dependent reliability of monolithic ceramic components ...
NASA Center: Glenn Research Center
Publication Year: 2003
Added to NTRS: 2005-08-25
Document ID: 20030014949; Report Number: E-13748, NAS 1.15:106316, NASA/TM-2003-106316
Structural design methodologies for ceramic-based material systems
Author(s): Duffy, Stephen F.; Chulya, Abhisak; Gyekenyesi, John P.
Abstract: One of the primary pacing items for realizing the full potential of ceramic-based structural components is the development of new design methods and protocols. The focus here is on low temperature, fast-fracture analysis of ...
NASA Center: Glenn Research Center
Publication Year: 1991
Added to NTRS: 2005-08-25
Accession Number: 91N22460; Document ID: 19910013147; Report Number: E-5418, NAS 1.15:103097, NASA-TM-103097
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