Abstract:
This work provides a comprehensive review of numerical simulation and optimisation of the shot peening found in the
existing literature over the past 10 years. The review found that the developed numerical models coupling finite elements
with discrete elements became increasingly mature and showed their advantages in incorporating flow behaviour
and randomness of shots. High emphasis must be placed on the constitutive equations of target material where its
strain-rate sensitivity, cyclic behaviour and Bauschinger effects are recommended to be incorporated in the numerical
material model simultaneously since considering one of them in isolation may lead to unreliable distribution of residual
stresses. Furthermore, material hardening is a critical benefit of shot peening; however, it has not received its deserved
attention from the existing investigations, neither in simulation nor in optimisation. The study found that intensity and
coverage are two critical control parameters recommended to be constraints for optimisation of shot peening. Finally,
this work also found that developed heuristic algorithms, such as genetic algorithms have recently showed their advantages
for searching optimal combinations of peening parameters. It is plausible that in the near future, the synergy of
combining these algorithms with approximation models can be expected to gain more attention by researchers.
