A method is introduced for efficient reliability-based design of laser peening (LP) surface treatment to extend fatigue life of metal components. The method includes nonparametric probability density estimation, surrogate modeling using a new finite element (FE or FEA) approach, and reliability analysis with correlated random variables (RVs). Efficient LP simulation is achieved via a new technique termed single explicit analysis using time-dependent damping (SEATD), which reduces simulation times by a factor of 6. The example study of a three-point bend coupon reveals that fatigue life reliability significantly affects optimal LP design, as 52 laser spots are needed for 99% reliability versus 44 spots for 95%.
An Efficient Reliability-Based Simulation Method for Optimum Laser Peening Treatment
Mechanical Engineering Department,
Erik Jonsson School of Engineering and
The University of Texas at Dallas,
800 West Campbell Road,
Richardson, TX 75080
Manuscript received February 23, 2015; final manuscript received April 12, 2016; published online June 23, 2016. Assoc. Editor: Hongqiang Chen.
This material is declared a work of the U.S. Government and is not subject to copyright protection in the United States. Approved for public release; distribution is unlimited.
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Hasser, P. J., Malik, A. S., Langer, K., Spradlin, T. J., and Hatamleh, M. I. (June 23, 2016). "An Efficient Reliability-Based Simulation Method for Optimum Laser Peening Treatment." ASME. J. Manuf. Sci. Eng. November 2016; 138(11): 111001. https://doi.org/10.1115/1.4033604
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