Accession Number:

ADA626704

Title:

Experimental Validation of a Differential Variational Inequality-Based Approach for Handling Friction and Contact in Vehicle

Descriptive Note:

Corporate Author:

ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI

Report Date:

2015-11-20

Pagination or Media Count:

17.0

Abstract:

The observation motivating this contribution was a perceived lack of expeditious deformable terrain models that can match in mobility analysis studies the level of fidelity delivered by todays vehicle models. Typically, the deformable terrain-tire interaction has been modeled using Finite Element Method FEM, which continues to require prohibitively long analysis times owing to the complexity of soil behavior. Recent attempts to model deformable terrain have resorted to the use of the Discrete Element Method DEM to capture the soils complex interaction with a wheeled vehicle. We assess herein a DEM approach that employs a complementarity condition to enforce non-penetration between colliding rigid bodies that make up the deformable terrain. To this end, we consider three standard terramechanics experiments direct shear, pressure-sinkage, and single-wheel tests. We report on the validation of the complementarity form of con- tact dynamics with friction, assess the potential of the DEM-based exploration of fundamental phenomena in terramechanics, and identify numerical solution challenges associated with solving large-scale, quadratic optimization problems with conic constraints.

Subject Categories:

  • Soil Mechanics
  • Surface Transportation and Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE