A generalized particle in cell method for explicit solid dynamics

Vinh Phu Nguyen, Alban de Vaucorbeil, Chi Nguyen-Thanh, Tushar Kandal Mandal

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4 Citations (Scopus)

Abstract

Within the framework of the material point method, a generalized particle in cell method for explicit solid dynamics is presented. In this method, the solids are discretized by finite element meshes, and these meshes are embedded in a background Eulerian grid. The external and internal forces of the solids are calculated on their respective finite element meshes and are mapped to the background grid for solving the momentum equation. Two formulations for computing these forces are presented: one using the original configuration of the solids and the other employs the current configuration. Two and three dimensional numerical examples, covering massive tensile, compressive elastic and plastic deformation, demonstrate that the former formulation performs much better for extremely large deformation problems. Compared with previous material point methods, the proposed method offers these advantages: (i) better representation of solid boundaries, (ii) seamless enforcement of Dirichlet and Neumann boundary conditions, (iii) seamless treatment of material interfaces and (iv) higher efficiency. All of these are achieved with the introduction of a finite element mesh in a supposedly meshfree method.

Original languageEnglish
Article number113308
Number of pages22
JournalComputer Methods in Applied Mechanics and Engineering
Volume371
DOIs
Publication statusPublished - 1 Nov 2020

Keywords

  • Explicit dynamics
  • Generalized particle in cell (GPIC)
  • Massive deformation
  • Material point method

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