Symmetric contact and sliding interface algorithms for intense impulsive loading computations

This paper presents symmetric contact and sliding interface algorithms for intense impulsive loading computations due to high velocity impact and expl osive detonation. These algorithms are presented for both 2D and 3D geometr y. and they include the effect of friction. These algorithms can be used in a fully automatic mode, where the user is not required to input the slidin g interfaces, or they can be used with user specified interfaces. Also incl uded are the interface determination algorithms and the searching algorithm s. These algorithms are an extension of an earlier 2D algorithm that is dep endent on the order that the interface nodes are processed. The new symmetr ic algorithms are not order-dependent. In addition to providing more accura te computations. the new symmetric algorithms are better suited for paralle l processing. (C) 2001 Elsevier Science B.V. All rights reserved.