Title: Three-dimensional finite element modelling of the torso of the anthropomorphic test device THOR

Authors: Hailing Yu, Qing Zhou, George W. Neat

Addresses: Chenega Advanced Solutions and Engineering, LLC, Volpe National Transportation Systems Center, U.S. Department of Transportation, 55 Broadway, Kendall Square RTV-9M, Cambridge, MA 02142, USA. ' State Key Laboratory of Automotive Safety and Energy, Department of Automotive Engineering, Tsinghua University, Beijing 100084, China. ' Volpe National Transportation Systems Center, US Department of Transportation, 55 Broadway, Cambridge, MA 02142, USA

Abstract: This paper addresses development, calibration and validation of a three-dimensional finite element model of the torso sub-assemblies of a THOR 50th percentile adult male dummy. Modelled sub-assemblies include shoulders, a rib cage, bibs and attachments, a thoracic and lumbar spine, two abdominal modules, a pelvis and a jacket. The finite element mesh is constructed mainly from the CAD data, and mass properties are consistent between the model and the physical dummy on sub-assembly levels. The deformable materials include rib steel and damping materials, bibs, spinal flex joints, abdominal foams, etc. Systems identification is the main method used to calibrate the deformable material parameters based on tests conducted on material, component and/or sub-assembly levels. The model is validated with three types of impact tests performed on chest, upper abdomen or lower abdomen of a full assembly of the test device. Simulation results of impact force vs. deflection/penetration are analysed and compared with the corresponding experimental data, and simulation errors are discussed for forces, displacements and an energy dissipation measure.

Keywords: anthropomorphic test devices; test device for human occupant restraint; THOR dummy; torso; finite element modelling; FEM; calibration; validation; vehicle safety; adult male dummy; simulation; impact tests; crash tests; impact force; deflection; penetration; energy dissipation.

DOI: 10.1504/IJVS.2007.012589

International Journal of Vehicle Safety, 2007 Vol.2 No.1/2, pp.116 - 140

Published online: 25 Feb 2007 *

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