Munition Penetration-Depth Prediction
COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH HANOVER United States
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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.
- Numerical Mathematics
- Ammunition and Explosives