Modeling high-speed impacts and explosions with ExLO code

Abstract

Korea has recently developed a total shock physics code, ExLO, based on the three-dimensional finite element method in order to calculate highly transient events involving large deformations. One special feature of the code is that the Lagrangian, ALE and Eulerian schemes are integrated into a single framework. The details of the numerical schemes are described in a previous paper [1]. In this paper, the modeling capability of ExLO has been described for two extreme loading events: high-speed impacts and explosions. Results of three-dimensional calculations for penetration of long rods and segments (L/D < 1) into thick target show a good agreement with experimental results and other finite difference solutions. Next, we include the free field air blast modeling by two approaches, one-dimensional spherical coordinates and three-dimensional rectangular coordinates. The predictions are compared with an analytic solution of air blast. For large scale simulations required for complex design problems, some advances in the field of parallelization and adaptive meshing are demanded.

Investigation on the impact behavior of Al 2 O 3-SiC-MgO nanoceramic/metal laminated composite

“…Here, the ceramic fraction was modeled conically. The fundamental features of the highspeed impacts were categorized by nonlinear wave propagation and great strain rates associated with multi-material interactions [6]. Another analytical model was presented in 1998 by Zaera Sanchez-Galvez [7] according to the equation by Tate [8] and Alekseevskii [9] for the analysis of projectile penetration into tile ceramic.…”