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Title: Munition penetration-depth prediction : SERDP SEED Project MR-2629
Authors: Song, Arnold J.
West, Brendan A.
Taylor, Oliver-Denzil S.
O’Connor, Devin T.
Parno, Matthew D.
Hodgdon, Taylor S.
Cole, David M.
Clausen, Jay L.
Keywords: Discrete element method
Finite element method
Numerical analysis
Penetration mechanics
Publisher: Cold Regions Research and Engineering Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: ERDC/CRREL;TR-17-12
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.
Appears in Collections:Technical Report

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