Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Modeling strong discontinuities in the material point method using a single velocity field

Journal Article · · Computer Methods in Applied Mechanics and Engineering
 [1];  [2];  [3];  [2];  [3]
  1. Univ. of California, San Diego, CA (United States)
  2. Brown Univ., Providence, RI (United States)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

We propose a new way to include strong velocity discontinuities in the material point method (MPM). We use the recent idea of damage gradient partitioning to dynamically determine whether or not deformed locations of material points are on the same side of a discontinuity as each node of a finite element discretization of the Eulerian velocity field. Velocity basis functions associated with the finite element nodes are then altered to ensure that their contributions to discontinuous components of the velocity are supported only at points assigned to the same side of the discontinuity. The partitioning of material points relative to each finite element node eliminates the need for indexing partitions, and accommodates discontinuities that do not partition material into disjoint bodies (e.g., propagating cracks). By building velocity discontinuities directly into the approximation space, sliding contact, separation, and multi-body interaction are possible within a single velocity field. The methodology avoids the need to track contact surfaces, construct and evolve explicit cracks, or use multiple velocity fields. Several numerical examples are computed to support these claims. The examples are also compared to the conventional MPM, demonstrating the method’s superiority in dealing with sliding contact and separation.

Research Organization:
Los Alamos National Laboratory (LANL)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
89233218CNA000001
OSTI ID:
1484659
Alternate ID(s):
OSTI ID: 1636173
Report Number(s):
LA-UR-18-26531
Journal Information:
Computer Methods in Applied Mechanics and Engineering, Journal Name: Computer Methods in Applied Mechanics and Engineering Journal Issue: C Vol. 345; ISSN 0045-7825
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (21)

Fluid-membrane interaction based on the material point method journal June 2000
A stabilized conforming nodal integration for Galerkin mesh-free methods journal January 2000
A convected particle domain interpolation technique to extend applicability of the material point method for problems involving massive deformations journal March 2011
Field-gradient partitioning for fracture and frictional contact in the material point method: Field-gradient partitioning for fracture and frictional contact in the material point method journal August 2016
Enhancement of the material point method using B-spline basis functions journal July 2017
Modelling of landslides with the material-point method journal April 2009
Simulation of dynamic fracture with the Material Point Method using a mixed J-integral and cohesive law approach journal June 2011
Smoothed Particle Hydrodynamics (SPH): an Overview and Recent Developments journal February 2010
Application of a particle-in-cell method to solid mechanics journal May 1995
A particle method for history-dependent materials journal September 1994
The material-point method for granular materials journal July 2000
A multi-mesh MPM for simulating the meshing process of spur gears journal August 2003
Nonlinear complementarity functions for plasticity problems with frictional contact journal September 2009
A contact formulation based on a volumetric potential: Application to isogeometric simulations of atrioventricular valves journal March 2018
Material point method applied to multiphase flows journal March 2008
Material point method enhanced by modified gradient of shape function journal July 2011
Meshfree Methods: Progress Made after 20 Years journal April 2017
Smoothed particle hydrodynamics: theory and application to non-spherical stars journal December 1977
The cosmological simulation code gadget-2 journal December 2005
A material point method for snow simulation journal July 2013
Smoothed Particle Hydrodynamics journal September 1992

Cited By (2)