Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Phillip W. Gravett"'
Autor:
Santosh B. Narasimhachary, Phillip W. Gravett, Sachin R. Shinde, Kanwardeep S. Bhachu, James C. Newman
Publikováno v:
Engineering Fracture Mechanics. 199:760-772
The importance of capturing crack growth behavior under creep-fatigue and thermo-mechanical-fatigue is well known. Such service load environments are often simulated by performing tests under load and displacement control conditions where the specime
Autor:
M. M. Kirka, Stephen D. Antolovich, Phillip W. Gravett, K. A. Brindley, Richard W. Neu, Sachin R. Shinde
Publikováno v:
International Journal of Fatigue. 81:48-60
Thermomechanical fatigue (TMF) is a low cycle fatigue process in which material life is correlated to the mechanical strain amplitude. However, it is well known that several other factors influence this life. This paper examines several of these para
Autor:
Richard W. Neu, Phillip W. Gravett, Sachin R. Shinde, K. A. Brindley, Stephen D. Antolovich, M.M. Kirka
Publikováno v:
International Journal of Fatigue. 81:191-201
The aging of the microstructure of Ni-base superalloys during service is primarily characterized by coarsening and rafting of the γ ′ precipitates. The influence of these different aged microstructures on thermomechanical fatigue (TMF) under eithe
Publikováno v:
Engineering Fracture Mechanics. 237:106493
Stress-intensity factor and compliance solutions developed for a single edge notch (SEN) specimen has been validated and verified for tension-compression loading. Fatigue crack growth tests were conducted on the SEN and a surface-crack specimen at st
Publikováno v:
Journal of Engineering for Gas Turbines and Power. 140
We developed and successfully applied a direct simulation Monte Carlo (MC) scheme to quantify the risk of fracture for heavy-duty rotors commonly used in the energy sector. The developed probabilistic fracture mechanics (FM), high-performance computi
Application of 3D Fracture Mechanics for Improved Crack Growth Predictions of Gas Turbine Components
Publikováno v:
Volume 7A: Structures and Dynamics.
Fracture mechanics analysis is essential for demonstrating structural integrity of gas turbine components. Usually, analyses based on simpler 2D stress intensity solutions provide reasonable approximations of crack growth. However, in some cases, sim
Publikováno v:
Volume 7A: Structures and Dynamics.
We developed and successfully applied a direct simulation Monte-Carlo scheme to quantify the risk of fracture for heavy duty rotors commonly used in the energy sector. The developed Probabilistic Fracture Mechanics high-performance computing methodol
Publikováno v:
Advanced Materials Research. :1314-1319
Significantly reducing the minimum temperature while maintaining maximum temperature of thermomechanical fatigue (TMF) cycles can reduce the life even when mechanical strain ranges are similar. This applies to in-phase (IP) and out-of-phase (OP) TMF
Publikováno v:
Engineering Fracture Mechanics. 108:275-284
The crack paths are analyzed of fatigue cracks in aged IN738 taken from removed turbine blades. Both artificial cracks initiated from notches and service cracks found in removed blades are taken into consideration. Transgranular crack growth is most
Publikováno v:
Volume 7A: Structures and Dynamics.
Cyclic plasticity and creep are the primary design considerations of 1st and 2nd stage gas turbine blades. Directionally-solidified (DS) Ni-base materials have been developed to provide (1) greater creep ductility and (2) lower minimum creep rate in