A study on the impact response of liquid-filled cylindrical shells

The axial impact buckling of thin metallic cylindrical shells fully filled with water was studied through impact experiments and numerical simulations. Low velocity impact tests were carried out by DHR-9401 drop hammer rig. The experimental results indicate that quite high internal hydrodynamic pressure occurs inside the shell during the impact process. Under the combined action of high internal pressure and axial compression the thin-walled shells buckle plastically and the buckling modes take on regular and axisymmetric wrinkles. Under the joint action of the high internal pressure and the axial compression plastic buckling take place easily on the thin-walled shells and buckling modes take on regular and axisymmetric wrinkles. These results of the tests were used to validate a numerical model. The validated model was used in a parametric study of impacted specimens and these included variations in the shell wall thickness, material strength, length of the specimen and velocity of impact.