Research Information System
8th International Conference on Materials Science and Nanotechnology For Next Generation, Elazığ, Turkey, 14 - 16 July 2021, pp.134
The shot
peening process has been widely utilized as a surface treatment to improve the
fatigue strength of the parts used in the automotive, aerospace, and aircraft
industries. Residual compressive stress is formed on the surface of the target
metal after the process that enhances the fatigue life of the part and reduces
maintenance costs. Although there have been numerous experimental studies on
the shot peening process, computational analyses are limited. Within this study, the shot peening process
is simulated by the finite element method (FEM) and smoothed-particles
hydrodynamics (SPH). The Johnson-Cook hardening model is used to define the
high strain-rate behavior of the 7075-T6 Al alloy, and the Hugoniot equation of
state formulation is used to describe steel shots. Verification of the FEM is
conducted through comparison analyses results with an experimental study in the
literature. The effect of average particle size and shot velocity on the
residual stress distribution of the treated alloy is analyzed. The results put
forth that the compressive residual stress formed on the base metal shows an
increase at the higher shot velocities. Also, larger particles deepen the
plastic deformation region and thus, yield higher values of compressive
residual stress. The research outcomes
would be beneficial for a better understanding of the influence of shot peening
parameters on the fatigue life assessment of the shot-peened parts.