Numerical Study of Soil Modelling Approaches using LS-DYNA – Part 2

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Authors
  1. Donahue, L.
Corporate Authors
Defence R&D Canada - Valcartier, Valcartier QUE (CAN);MARTEC Ltd, Halifax NS (CAN)
Abstract
This report is a continuation of a previous modelling study (Martec Technical Report TR-07-21) for sand under high strain rate loading. The objective of this project is to investigate the suitability of several LS-DYNA material models to simulate Valcartier soil response under landmine loading conditions. Parameters for the two soil material models were determined using in-situ soil measurements, validated for simple triaxial tests, and used to simulate a DRDC Valcartier experiment with a 6.0 kg landmine charge. The material models used gave comparable crater sizes and shapes. The crater depths agreed relatively well with experimental data; however, there were significant differences between predicted and measured crater radii. Limited parametric studies were performed on soil strength and mine detonation model, but these did not yield agreement with experiment. The cause of the discrepancy between the numerical and experimental crater sizes is unknown at this time. Differences could be due to additional soil physics that are not considered in the numerical models, or by unknown factors in the experimental configuration. For comparison purposes, a brief literature survey was performed, and crater shapes from other numerical simulations included. 2.0

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Report Number
DRDC-VALCARTIER-CR-2009-164 — Contractor Report
Date of publication
01 Apr 2009
Number of Pages
45
DSTKIM No
CA033275
CANDIS No
532579
Format(s):
Electronic Document(PDF)

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