Probabilistic sensitivity analysis of a laser peening fatigue life enhancement process
International Journal of Structural Integrity
ISSN: 1757-9864
Article publication date: 24 August 2012
Abstract
Purpose
The purpose of this paper is to estimate probabilistic and regional importance sensitivities of fatigue life, with respect to the laser peening (LP) parameters applied to a Titanium turbine disk.
Design/methodology/approach
The sensitivities were calculated from Monte Carlo (MC) analysis of 21,000 simulations and probabilistic sensitivity methods.
Findings
The probabilistic sensitivity results indicate that the peak pressure and the mid‐span are the most important variables. The regional importance sensitivity results indicate that probability of failure is the most sensitive to the left tail of peak pressure and middle region of mid‐span and the fatigue life mean is the most sensitive to the left tails of the peak pressure and the mid‐span.
Practical implications
The sensitivity results of this research indicate that more time and energy should be focused on managing peak pressure and mid‐span, as compared to the remaining variables, to design and improve the laser peening process.
Originality/value
The paper presents four sensitivity analysis approaches which were formulated and employed to estimate fatigue life sensitivities with respect to the LP variables.
Keywords
Citation
Singh, G., Cortina, M., Millwater, H. and Clauer, A. (2012), "Probabilistic sensitivity analysis of a laser peening fatigue life enhancement process", International Journal of Structural Integrity, Vol. 3 No. 3, pp. 210-235. https://doi.org/10.1108/17579861211264352
Publisher
:Emerald Group Publishing Limited
Copyright © 2012, Emerald Group Publishing Limited