PROJECTILE PENETRATION IN SOILS

Abstract

The problem of "Projectile Penetration in Soils'-' has. ben" a.' well recognised subject in dynamics. It requires knowledge of various disciplines .including 'soil and structural dynamics. A fair amount of attention has been, given by 'scientists and engineers for the, design of Nμclear Power Plants and oher' strategic structures at a safe depth below the ground from possible missile or nuclear warhead. Being a -very complex problem, certain assumptions are always essential in dealing with projectile penetration. There are. a,. number of methods to deal with the problem but broadly, these can be divided into three classes namely empirical', modelling, and two-dimensional wave code: Each method has own advantages and limitations. In this dissertation, a mathematical model for one-dimensional analysis for projectile penetration into -earth media-have been proposed. This -model. is-based on "Cylindrical . Cavity Expansion" concept which reduces the problem in one-dimensional. Using the principle of conservation of-Mass and Momentum. Basic equations,., related to displacement (strain) and forces (stresses) have been developed. These equations are solved with the help of Runge-Kutta Self Iterative Method. With an attempt to find the validity of proposed model an actual experimental problem is solved by,the use of above solved.: equations. Comparison of numerical and .experimental results .show- that they are in good agreement. Hence this proves, validity of the - proposed model.