Paper Title :An Improved Methodology for Modelling and Simulation of Laser Shock Peening
Author :Da Desai, Ffameso,S Kok
Article Citation :Da Desai ,Ffameso ,S Kok ,
(2023 ) " An Improved Methodology for Modelling and Simulation of Laser Shock Peening " ,
International Journal of Mechanical and Production Engineering (IJMPE) ,
pp. 32-37,
Volume-11,Issue-6
Abstract : The evolution of laser shock peening as a surface treatment and processing technique has opened several vistas
for providing preventive and condition-based maintenance solutions for the prevention of downtimes from in-service failure
of power plant components, such as aircraft engine turbine blades. Advancements in computational power with the
development of supercomputers has also progressively sparked intensive research in the development of laser shock peening
(LSP) models, capable of modelling and simulating the induction of compressive layers around and beneath the surface of
turbine blades, utilizing the conventionally well-known Johnson-Cook plasticity/damage models. However, founded upon a
phenomenological yet a fully physics-based constitutive model, this study presents a unique experimentally validated
computational modelling approach of the LSP process employing a mechanical threshold stress (MTS) damage model for
compressive residual stress induction irrespective of increasing laser shock intensities. Encouragingly, the results revealed
better accuracy and predictive capabilities when compared to conventional empirical LSP models. Furthermore and hitherto
overlooked previously by researchers, the technique described in this study shows considerable promise when benchmarked
against experimental results, with surface residual stresses of about 700 MPa being induced on the X12Cr material to an
affected depth threshold of 0.6mm. Based on the results achieved, it may be stated with confidence that the proposed
modelling approach can render reliable guidance for practical control of the LSP process operation in the overall quest to
mitigate crack initiation and growth especially at the surface of the turbine blades, as well as to prevent catastrophic failure
of the aircraft turbine engine while in service.
Keywords - Laser shock peening, Mechanical threshold stress, Finite Element Analysis.
Type : Research paper
Published : Volume-11,Issue-6
DOIONLINE NO - IJMPE-IRAJ-DOIONLINE-19913
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Copyright: © Institute of Research and Journals
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Published on 2023-10-19 |
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