A comparison of Lagrangian/Eulerian approaches for tracking the kinematics of high deformation solid motion.

Ames, Thomas L. ; Farnsworth, Grant V. ; Ketcheson, David Isaac ; Robinson, Allen Conrad

Sandia National Laboratories

关键词: Lagrangian Functions.;    Simulation And Modeling;    Particle Kinematics;    Modeling/ Simulation.;    Lagrangian Function;   

DOI  :  10.2172/984939
RP-ID  :  SAND2009-5154
RP-ID  :  AC04-94AL85000
RP-ID  :  984939

美国|英语

来源: UNT Digital Library

【 摘 要 】

The modeling of solids is most naturally placed within a Lagrangian framework because it requires constitutive models which depend on knowledge of the original material orientations and subsequent deformations. Detailed kinematic information is needed to ensure material frame indifference which is captured through the deformation gradient F. Such information can be tracked easily in a Lagrangian code. Unfortunately, not all problems can be easily modeled using Lagrangian concepts due to severe distortions in the underlying motion. Either a Lagrangian/Eulerian or a pure Eulerian modeling framework must be introduced. We discuss and contrast several Lagrangian/Eulerian approaches for keeping track of the details of material kinematics.