Hybrid III dummies are the most commonly used test devices for assessing 'injury' in crash testing. They are currently the federally mandated and regulated industry standard for frontal crash testing. When designing these dummies, the developers utilized different materials including rubber, foam, vinyl, steel, and aluminum, in an attempt to create a biofidelic occupant for measuring crash severity. The focus when designing the Hybrid III dummies was only on front impacts and all measurements and injury assessments are calibrated for these types of impact. The fundamental measurements which these dummies are designed to provide include: head and neck acceleration, chest acceleration, chest deflection, and femur load. These measurements are used to assess occupant injury level and hence the vehicle crashworthiness and safety. The 50th Percentile Hybrid III, representing an average 50th percentile male occupant in mass and inertia, was the first developed and is the most fequenty used dummy in the Hybrid III family. In this study a finite element model of a 50th percentile Hybrid III dummy is developed. This paper presents the methodology used in developing the model. A general description of the model and its subcomponents is also presented. The model was developed for the LS-DYNA finite element code with several fundamentals in mind. First the resulting FE model must accurately represent the actual dummy. Second, the dummy model should be easily positioned and incorporated in vehicle and vehicle compartment models. The model should also be efficient, robust, and reliable. For this, special modeling techniques, such as using a uniform mesh for all important components and using one 'automatic single surface interface' to treat the contact between all dummy components are incorporated in the model.
Development of a 50th percentile Hybrid III dummy model
Entwicklung eines 50-prozentigen Hybrid III-Dummymodells
2003
10 Seiten, 3 Bilder, 1 Tabelle, 5 Quellen
Conference paper
English
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