Abstract
A unified shock physics code, ExLO, in which Lagrangian, ALE and Eulerian solvers are incorporated into a single framework, has recently been developed in Korea. It is based on the three-dimensional explicit finite element method and written in C++. ExLO is mainly designed for the calculation of structural responses to highly transient loading conditions, such as high-speed impacts, high-speed machining and explosions. In this paper the numerical schemes are described. Some improvements of the material interface and advection scheme are included. Details and issues of the momentum advection scheme are provided. Numerical predictions are in good agreement with the existing experimental data. Specific applications of the code are discussed in a separate paper in this journal. Eventually, ExLO will provide an optimum simulation environment to engineering problems including the fluid-structure interaction problems, since it allows regions of a problem to be modeled with Lagrangian, ALE or Eulerian schemes in a single framework.
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This paper was recommended for publication in revised form by Associate Editor Heoung Jae Chun
Minhyung Lee. Professor in the Mechanical and Aerospace Engineering at the Sejong University, Seoul, Korea, holds a PhD from the University of Texas at Austin. His research interests include Lagrangian, Multi-material Eulerian and arbitrary Lagrangian-Eulerian (ALE) finite element methods for high strain rate of large deformation problems (eg, high speed impact/pene-tration, air blast/underwater explosion and bubble dynamics). Prior to joining Sejong University, he was with the US Naval Postgraduate School, Monterey, CA. as a research professor working on the UNDEX problems. He was also with the Institute for Advanced Technology, Austin, TX. (federated with Army Research Lab.) working on the highly transient dynamics.
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Lee, M., Chung, WJ., Kim, H.J. et al. ExLO: A three-dimensional total shock physics FEM code. J Mech Sci Technol 23, 1342–1353 (2009). https://doi.org/10.1007/s12206-009-0353-0
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DOI: https://doi.org/10.1007/s12206-009-0353-0