Effect of Adiabatic Shear on Penetration Properties of Water-back Plate

Adiabatic shear is one of the complicated damage mechanics of materials. In high strain rate situation, plastic deformation will bring temperature increasing, which makes the damage of the target plate is penetrated and melted. In this paper, adiabatic shear tests were designed, and a finite element model (FEM) based on Johnson-Cook method was set up, the experimental and numerical results were verified and compared to each other. Based on the FEM, the process of projectile penetrating water-back plate was analyzed, results indicated that: (1) In high strain rate loading, the temperature effect caused by adiabatic shear must be figured out; (2) The process of projectile penetrating liquid-filled tank can be divided into four distinct stages: mushrooming propagating, crushing, shearing and perturbing; (3) The residual velocity of the fragments considering adiabatic shear effect is smaller than that of without considering the effect. And the difference value is small when the initial velocity is slow, but will increase with the increasing of the initial velocity.