Influence of Pre-Stressed Parts in Dummy Modeling - Simple Considerations
New regulations and consumer tests for passive safety in passenger cars have increased the de- mand on accurate models for occupant analysis. Thus, effects that have been neglected or mod- eled rather coarsely in recent occupant models might necessitate a more detailed modeling in order to capture the dummy behavior sufficiently accurate. This paper contributes to the discussion of the importance and the modeling techniques of pre- stressed parts in dummy models for occupant analysis. The authors present solutions provided by LS-DYNA to handle the pre-stressed parts like mapping, pre-simulation, or implicit time-step- ping for positioning. Finally, the paper discusses sources of pre-stress in different parts of side impact dummies (SID), Hybrid III adult and child dummies. With simple examples the influence of the pre-stress is estimated.
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Influence of Pre-Stressed Parts in Dummy Modeling - Simple Considerations
New regulations and consumer tests for passive safety in passenger cars have increased the de- mand on accurate models for occupant analysis. Thus, effects that have been neglected or mod- eled rather coarsely in recent occupant models might necessitate a more detailed modeling in order to capture the dummy behavior sufficiently accurate. This paper contributes to the discussion of the importance and the modeling techniques of pre- stressed parts in dummy models for occupant analysis. The authors present solutions provided by LS-DYNA to handle the pre-stressed parts like mapping, pre-simulation, or implicit time-step- ping for positioning. Finally, the paper discusses sources of pre-stress in different parts of side impact dummies (SID), Hybrid III adult and child dummies. With simple examples the influence of the pre-stress is estimated.
05-4.pdf
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