Accession Number:

AD1039187

Title:

Munition Penetration-Depth Prediction

Descriptive Note:

Technical Report

Corporate Author:

COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH HANOVER United States

Personal Author(s):

• Song,Arnold S.
• West,Brendan A.
• Taylor,Oliver-Denzil S.
• O'Connor,Devin T.
• Parno,Matthew D.
• Hodgdon,Taylor S.
• Cole,David M.
• Clausen,Jay L.

Report Date:

2017-08-01

Pagination or Media Count:

42.0

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.

Descriptors:

• cold regions
• munitions
• FINITE ELEMENT METHOD
• Numerical analysis
• PENETRATOR MUNITIONS
• Projectiles

Subject Categories:

• Numerical Mathematics
• Ammunition and Explosives

Distribution Statement:

APPROVED FOR PUBLIC RELEASE