Using a local-interaction model to determine the resistance to penetration of projectiles into sandy soil

Abstract

A local-interaction model describing the penetration of axisymmetric projectiles into sandy soil at a constant velocity is studied experimentally and theoretically. Two approaches to the determination of the parameters of the quadratic local-interaction model are considered. The first approach is based on the use of the solution of the problem of spherical-cavity expansion taking into account the dynamic compressibility and shear resistance of soil. In the second approach, model parameters are determined based on the experimental dependence of the resistance to penetration of conical projectiles into a sandy soil on the impact velocity. Good agreement was obtained between the results of experiments, two-dimensional numerical calculations, and calculations for the local interaction model based on the solution of the spherical-cavity expansion problem and used to determine the maximum resistance to penetration of conical and spherical projectiles.

Advances in Projectile Penetration Mechanism in Soil Media

“…Jiang and Sun [56] employ a constitutive model that considers the role of grains fracture to obtain improved behavior target under impact. The better prediction of the sand under complex shape projectile impact is obtained by Kotov et al [57] by incorporating the local projectile-target interaction assuming each element of the projectile interacts independently in the sand media.…”

Evaluating Contact Stresses for an Impactor Penetrating Soil, Accounting for Dynamic Compressibility, Internal Friction, and Initial Strength of the Soil

“…Dynamic compressibility of a medium is characterized by the shock adiabat, and shear resistance is defined by the Mohr-Coulomb plasticity condition. Based on the introduced analytical solution, a methodology for evaluating forces resisting penetration of a rigid body into a soft soil was developed [22]. Relations for the maximal force resisting penetration of a rigid sphere and an impactor with a conical head into dry and water-saturated sand were obtained [23].…”