A Convected Particle Least Square Interpolation Material Point Method

Research output: Contribution to journalArticle

Researchers

Research units

  • Department of Mechanical Engineering, University of Utah
  • Scientific Computing and Imaging Institute, University of Utah

Abstract

Applying the Convected Particle Domain Interpolation (CPDI) to the Material Point Method has many advantages over the original Material Point Method, including significantly improved accuracy. However, in the large deformation regime, the CPDI still may not retain the expected convergence rate. The paper proposes an enhanced CPDI formulation based on least square reconstruction technique. The Convected Particle Least Square Interpolation (CPLS) Material Point Method assumes the velocity field inside the material point domain as non‐constant. This velocity field in the material point domain is mapped to the background grid nodes with a Moving Least Squares reconstruction. In this paper, we apply the Improved Moving Least Squares method to avoid the instability of the conventional Moving Least Squares method due to a singular matrix. The proposed algorithm can improve convergence rate, as illustrated by numerical examples using the Method of Manufactured Solutions.

Details

Original languageEnglish
JournalInternational Journal for Numerical Methods in Engineering
Publication statusE-pub ahead of print - 23 Oct 2019
MoE publication typeA1 Journal article-refereed

    Research areas

  • convected particle domain interpolation, improved moving least squares, material point method, methods of manufactured solution, moving least squares, numerical convergence

ID: 38195312