Crashworthiness Research regularly performs simulations of vehicle to vehicle, vehicle to barrier, and component impact tests. These simulations allow NHTSA to efficiently develop test procedures and evaluate crashworthiness countermeasures. All of our Finite Element Analysis(FEA) model simulations were performed using either LSTC's Dyna3d, or the LLNL Dyna3d codes. Where appropriate, contributors have included Geometry data (IGES files or Patran neutral files) along with the dyna input decks.

FEA model data, including dyna input files, geometry files, and text descriptions are available. This data is all in the public domain and redistribution is encouraged. NHTSA does not guarantee the accuracy or suitability of any of these models for any purpose whatsoever. These models are provided here as an aid to encourage research in automotive crashworthiness.

Included below is some descriptive information on some of the more recent updates to the NHTSA include/www site.

This finite element model of the SID (SID97) is an upgraded model which was extensively revised in the lower body and abdomen regions by Easi-Engineering, Inc under contract to NHTSA. A draft copy of the report on the development of this model is available by contacting Randa Samaha.

The Febod program has been modified to include the latest GEBOD database received from Wright Patterson AFB. This revision also contains corrections to the database of the 15 segment (single unit lower arms and hands) dummies. The code was also modified to correct the conversion of English units to SI or mg, mm, sec units.

The febod program generates rigid ellipsoids occupant models for use with DYNA. Click on the image above to download the FORTRAN-77 source code and data files in a compressed zip file. The Fortran code was recently revised as explained in the above paragraph. Please check the readme.new file, for any other updates from the earlier source code, and information that were available here.

The febod program is an extension of the gebod program developed by Wright Patterson Air Force Base, Armstrong Laboratory. This program can generate human and dummy body descriptions using rigid ellipsoids and connected with DYNA joints. The geometric and mass properties, and joint's location and mechanical properties are computed for children, adult human males or females, and for anthropomorphic dummies. Based on user input data on occupant age, size, height, and/or weight, the febod program generates an appropriate INGRID input deck for either LS-DYNA or LLNL DYNA.

This program was developed by Greg Kay of the Lawrence Livermore Laboratories in cooperation with NHTSA. It utilizes the anthropomorphic data developed by Wright Patterson's Armstrong Laboratories for the Gebod program. Please see the Gebod manual for more information, "Generator of Body (GEBOD) Manual", bu Huaining Cheng, Louise Obergefell, and Annette Rizer, AL/CF-TR-1994-0051 (available from NTIS). This program is public domain and distribution is encouraged.