Combining head models with composite helmet models to simulate ballistic impacts

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Authors
  1. van Hoof, J.
  2. Worswick, M.J.
Corporate Authors
Defence Research Establishment Valcartier, Valcartier QUE (CAN);Waterloo Univ, Waterloo ONT (CAN) Dept of Mechanical Engineering
Abstract
Numerical modelling of a helmeted head undergoing ballistic impact has been undertaken using a number of finite element codes and models. The University of Waterloo composite helmet model has been combined with a model of the human head, originally developed for automotive crash studies and extended to consider trauma due to ballistic impact. Two head models were considered. Initially, the Délégation Générale pour l'Armement (DGA) head model was run within the PAMCRASH finite element code. This choice of code and head model was adopted to enable collaborative exchange with the French DGA and required implementation of the Waterloo composite model within PAMCRASH. Incompatibilities were identified mid-way through the implementation process; however, modifications to PAMCRASH to allow proper treatment of the delamination algorithm have not been made available by ESI to date. As a work-around to the problems encountered in PAMCRASH, it was decided to run the simulations within VEC-DYNA. To facilitate this work, DGA has allowed the university to convert their head model to VEC-DYNA format. One the conversion was completed, it has been possible to perform the required simulations and preliminary predictions of the contact forces resulting from the impact of the backplane with the skull have been obtained. TRUNCATED
Keywords
Combat helmets;Biomechanical modeling;Head trauma;Ballistic response;Backplane deformation;LS-DYNA3D;Hydrocode simulation;Numerical simulation
Report Number
DREV-CR-2000-160 — Contractor Report (Final)
Date of publication
30 Nov 2000
Number of Pages
37
DSTKIM No
CA011296
CANDIS No
515882
Format(s):
Hardcopy;Document Image stored on Optical Disk

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