Author(s)

G.R. Johnson, R.A. Stryk & S.R. Beissel

Abstract

SPH (Smooth Particle Hydrodynamics) algorithms can introduce errors at free boundaries, material interfaces, attachment to finite element grids, and sliding interfaces on finite element grids. This paper identifies and evaluates these error sources for a variety of impact problems. 1 Introduction SPH methods are now being used for a wide variety of impact problems. The basic SPH technique was first introduced by Lucy [1] and Gingold and Monaghan [2] in 1977. More recently, the effect of strength was added by Libersky and Petschek [3], axisymmetric algorithms were developed by Johnson, Petersen, and Stryk [4], and Petschek and Libersky [5], and a Normalized Smoothing Function (NSF) algorithm was developed by Johnson and Beissel [6]. SPH nodes have also been linked to finite elements by Johnson, Petersen, and Stryk [4, 7], and At

Keywords