Munition Penetration-Depth Prediction
Abstract
Existing models for predicting the penetration depth of munitions and explosives of concern are inaccurate and insufficient from a user (range manager, U.S. Army Corps of Engineers project manager, or environmental consultant) operability perspective for current needs. We attribute poor model performance to (1) a heavy dependence on empirically derived parameterizations poorly linked to the physical properties of the target material or (2) physics-based models that inadequately capture the salient mechanical processes, especially in the first meter of penetration. Consequently, we have developed a micromechanical-based model using a hybrid discrete element model (DEM) / finite element model (FEM) approach capable of a detailed treatment of near-surface soil properties. To examine the effects of varying levels of moisture on the dynamic behavior of a soil, we fabricated a small-scale triaxial shear test to inform the development and calibration of the DEM contact model. We conducted projectile-drop tests into sand with a scale version of a 57 mm projectile and measured projectile penetration to compare with model results.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 2017
- Accession Number
- AD1039187
Entities
People
- Arnold S. Song
- Brendan A. West
- David M. Cole
- Devin O’Connor
- Jay L. Clausen
- Matthew Parno
- Oliver-denzil S. Taylor
- Taylor S. Hodgdon
Organizations
- Cold Regions Research and Engineering Laboratory