The problem of ensuring security of light armored vehicles corps: formulation and approaches to solving

Abstract

Interaction of an indenter (kinetic ammunition) with an armored obstacle is highly nonlinear physico-mechanical process. In the paper a complex of problems of numerical investigation of penetration of the projectile into the target is posed and solved. Different numerical methods are used for discretization of the resolving system. The use of simplified models and empirical relations gives an opportunity to put the problem of multivariate analysis of the of the projectile-target impact process for variable type of the shell,  the material properties of its jacket and core, as well as armor plate material, impact angle and velocity, etc. In a first proximity, the initial stage of the meeting and the contact interaction of the projectile with the armor plates can be represented as a contact between two half-spaces. To analyze the distribution of contact pressure in conjunction of complex shaped bodies it is proposed to use the method of boundary integral equations (MBIE). Using a mathematical model in MatLab environment a software module «SBEM» was created. It implements an iterative procedure for finding the contact area and the contact pressure p. The paper investigates the contact of two bodies of revolution, the gap between them is a power function of the radius vector r with the exponent K. Modeling of the elastic properties of the layer simulating the roughness is accomplished by varying the parameter l. As a result certain qualitative features of the contact pressure distribution by varying the shape of the head of the kinetic projectile and compliance shell are established.