Numerical simulation and experimental study of the interaction between a pure high-velocity waterjet and targets: contribution to investigate the decoating process

Stripping process modelling: interaction between a moving waterjet and coated target

“…During this period the jet keeps its cylindrical shape. Next, the jet strikes the coated target and causes a chock state, which is characterised by instabilities occurring for 0.02 µs (after impact instant) [10]. For a time corresponding to 2 µs we observe clearly the reflection of the jet (Fig.…”

“…We note that the conventional lagrangian formulation will always remain the default displacement integration method in Dyna3D [10,15]. An operator-split technique is used to solve eulerian and arbitrary lagrangian-eulerian problems.…”

“…The modelling of the jet/target interaction was carried out by Dyna3D code [10]. This code is a finite element program used to analyse the non-linear dynamic response of two-and three-dimensional structures [9].…”

“…We underline, also, that we have simulated the target erosion by a numerical method which involves the failure of lagrangian elements; it is called the failure strain for eroding elements [10]. It consists in introducing a threshold strain after which lagrangian elements can be removed.…”

“…Therefore, we have studied the main phenomena occurring when there is relative movement between the waterjet and the coated target. For that, we have adopted a finite element numerical method [10]. Numerical erosion was introduced in order to simulate real erosion.…”