Numerical and experimental study on mechanism of material damage by high speed liquid-solid impact

In order to obtain the mechanism of material failure caused by high speed liquid droplet impact, numerical and experimental study were carried out. A review of the research situation in liquid-solid impact was made, and then a numerical. Model has been developed using finite element method-smoothed particle hydrodynamics coupled method. Meanwhile, an experimental apparatus for studying liquid-solid impact was build. The dynamic stress/strain response of polymethylmethacrylate glass and steel impacted by high speed liquid droplet were studied. The high speed digital vidicon was used to get the liquid droplet impact speed. Surface damage caused by liquid droplet with speed over 600 m/s was investigated using three dimensional digital microscope. The depth of pits caused by liquid droplet impact was measured, and it shows good agreement between numerical result and measurement data, so the numerical model used here is usable and accurate.