Postprocessing of Human Body Model Results – Introduction of the Open Source Tool DYNASAUR

New occupant seating postures and the increasing importance of vulnerable road users call for new assessment tools. Human body models (HBM) are validated for a variety of loading directions, can be adjusted and morphed to various postures and sizes and are therefore promising to solve these challenges. HBMs offer the possibility to analyse not only classical dummy injury criteria, but also deformations of the human body. But when analysing the strains of a detailed HBM with more than a million of elements, conventional postprocessing tools are often overloaded and not flexible enough. Facing these problems, the postprocessing tool DYNSASAUR was developed. It is able to handle big data files efficiently, offers clear and flexible evaluation and allows an easy implementation of probabilistic and deterministic injury predictors to quantify HBM results. Four different modules for the further postprocessing are currently implemented: • “CSDM” which allows the calculation of the percentage of volume of a body part exceeding a specified threshold • “Rib fracture” which includes the probabilistic rib fracture prediction model developed by Forman et al. (2012). • “Cross-section” module allowing the analysis of cross section forces • “Universal” in which stresses and strains of body parts can be analysed in detail The tool can be easily adapted to individual HBMs by modifying the definition files. Injury Risk curves and threshold can be also flexible implemented and adjusted to allow an easy implementation of new findings. DYNASAUR was released as a free open source tool. An exemplary application of the tool to real world bicycle accident is presented and shows the potential to predict critical injuries.