Many models are available in the literature that describe ductile and
brittle erosion processes and the influence of scale formation on the
erosion process. It is clear that each of these models has limited app
licability restricted by the mode of material removal being modelled.
Hence, if erosion processes over a wide range of dynamic conditions ex
pected in service are to be modelled then a new approach unifying the
individual mechanistic models must be adopted. This paper presents suc
h a unified approach. Monte Carlo simulation techniques are used to mo
del the stochastic nature of erosion processes. Particle properties, m
aterial surface condition and the local dynamic impact environment are
individually considered and permit a suitable mechanistic erosion mod
el to be selected for the particular impact conditions. Variation in p
article size, impact velocity and material properties are accommodated
by using statistical distributions to describe each condition. Using
Monte Carlo methods discrete impact conditions are selected and the am
ount of damage is calculated. The final erosion rate is given by summi
ng all of the discrete damage events. Predictions using this modelling
approach are compared with examples taken from laboratory studies aim
ed at simulating gas turbine service and coal combined cycle environme
nts are used to demonstrate the versatility of this Monte Carlo approa
ch.