Accession Number:

ADA610512

Title:

Evaluation of the Material Point Method within CTH to Model 2-Dimensional Plate Impact Problems

Descriptive Note:

Final rept. 21 May-15 Aug 2014

Corporate Author:

ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE

Personal Author(s):

Report Date:

2014-09-01

Pagination or Media Count:

18.0

Abstract:

The material point method MPM is a mixed Eulerian and Lagrangian computational method that allows for the discretization of solid bodies into material points carrying the full material state of the original body. This method is being evaluated as a new implementation within CTH, a code originally developed by Sandia National Laboratories, as a way of eventually dealing with fracture and other difficult solid mechanics scenarios. Applying CTH with MPM to a 2-dimensional plate impact problem yields multiple issues that must be examined. Issues with void compression upon initial impact, inhomogeneous particle states within a single cell, and inconsistencies within results obtained at different mesh resolutions are all discussed.

Subject Categories:

  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE