Probabilistic Treatment of Crack Nucleation and Growth for Gas Turbine Engine Materials-Reference-Cited by-同舟云学术

Probabilistic Treatment of Crack Nucleation and Growth for Gas Turbine Engine Materials

Published:2010-05-26 Issue:8 Volume:132 Page:
ISSN:0742-4795
Container-title:Journal of Engineering for Gas Turbines and Power
language:en
Short-container-title:

Author:

Enright M. P.¹,McClung R. C.¹,Hudak S. J.¹,Francis W. L.¹

Affiliation:

1. Southwest Research Institute, San Antonio, TX 78238

Abstract

The empirical models commonly used for probabilistic life prediction do not provide adequate treatment of the physical parameters that characterize fatigue damage development. For these models, probabilistic treatment is limited to statistical analysis of strain-life regression fit parameters. In this paper, a model is proposed for life prediction that is based on separate nucleation and growth phases of total fatigue life. The model was calibrated using existing smooth specimen strain-life data, and it has been validated for other geometries. Crack nucleation scatter is estimated based on the variability associated with smooth specimen and fatigue crack growth data, including the influences of correlation among crack nucleation and growth phases. The influences of crack nucleation and growth variability on life and probability of fracture are illustrated for a representative gas turbine engine disk geometry.

Publisher

ASME International

Subject

Mechanical Engineering,Energy Engineering and Power Technology,Aerospace Engineering,Fuel Technology,Nuclear Energy and Engineering

Link

http://asmedigitalcollection.asme.org/gasturbinespower/article-pdf/doi/10.1115/1.4000289/5706104/082106_1.pdf

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