This paper summarizes the development of a probabilistic micromechanical code for treating fatigue life variability resulting from material variations. Dubbed MICROFAVA (micromechanical fatigue variability), the code is based on a set of physics-based fatigue models that predict fatigue crack initiation life, fatigue crack growth life, fatigue limit, fatigue crack growth threshold, crack size at initiation, and fracture toughness. Using microstructure information as material input, the code is capable of predicting the average behavior and the confidence limits of the crack initiation and crack growth lives of structural alloys under LCF or HCF loading. This paper presents a summary of the development of the code and highlights applications of the model to predicting the effects of microstructure on the fatigue crack growth response and life variability of the Ti-alloy Ti-6Al-4V.
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October 2006
Technical Papers
A Probabilistic Micromechanical Code for Predicting Fatigue Life Variability: Model Development and Application
K. S. Chan,
K. S. Chan
ASME Fellow
Southwest Research Institute ®
, 6220 Culebra Road, San Antonio, TX 78238
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M. P. Enright
M. P. Enright
Southwest Research Institute ®
, 6220 Culebra Road, San Antonio, TX 78238
Search for other works by this author on:
K. S. Chan
ASME Fellow
Southwest Research Institute ®
, 6220 Culebra Road, San Antonio, TX 78238
M. P. Enright
Southwest Research Institute ®
, 6220 Culebra Road, San Antonio, TX 78238J. Eng. Gas Turbines Power. Oct 2006, 128(4): 889-895 (7 pages)
Published Online: September 6, 2005
Article history
Received:
August 30, 2005
Revised:
September 6, 2005
Citation
Chan, K. S., and Enright, M. P. (September 6, 2005). "A Probabilistic Micromechanical Code for Predicting Fatigue Life Variability: Model Development and Application." ASME. J. Eng. Gas Turbines Power. October 2006; 128(4): 889–895. https://doi.org/10.1115/1.2180811
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