An improved finite elementmodel to simulate themultiple solid
particles impact on cermet coating is presented in this paper. The
modeling process has further expanded to cover multiple sites to
both spatially and temporally investigate the issues of deformation
and crack formation. Themultiple particles impact that subsequent
particle from the previous particle impact area has a
certain degree of overlap is more consistent with practical
engineering conditions.
(2) Coating damage is serious when the coating layer thickness is
thinner. A conclusion that for relatively thick coatings, substrate
influence can be eliminated. The reasonable coating thickness
(greater than 100 μm) can effectively prevent its peeling.
Hence, the coating provides a benefit for the substrate material.
(3) With increasing of the impact velocity, radial and lateral cracks
are initiating and propagating on the coating surface. The interface
stress between coating and substrate is bigger and the