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Evaluation of the Hybrid III Dummy Interactions with Air Bag in Frontal Crash by Finite Element Simulation
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Abstract
A deformable finite element dummy model was used to simulate air bag interaction with in-position passenger side occupants in frontal vehicle crash. This dummy model closely simulates the Hybrid III hardware with respect to geometry, mass, and material properties.
Test data was used to evaluate the validity of the model. The calculated femur loads, chest acceleration and head acceleration were in good agreement with the test data. A semi-rigid dummy model (with rigid chest) was derived from the deformable dummy to improve turnaround time. Simulation results using the semi-rigid dummy model were also in reasonable agreement with the test data. For comparison purpose, simulations were also performed using PAMCVS, a hybrid code which couples the finite element code PAMCRASH with the rigid body occupant code. The deformable dummy model predicted better chest acceleration than the other two models. However, the semi-rigid dummy model and the PAMCVS model showed a dramatic reduction in CPU time.
Also, the results indicated that skin compliance has a softening effect on the impact response of the dummy. The dummy chest deformation was found to have an effect on the overall dummy response.
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Lin, T., Wawa, C., and Khalil, T., "Evaluation of the Hybrid III Dummy Interactions with Air Bag in Frontal Crash by Finite Element Simulation," SAE Technical Paper 952705, 1995, https://doi.org/10.4271/952705.Also In
References
- MADYMO User's Manual TNO Road Vehicles Research Institute 1994
- PAM-CRASH User's Manual ESI Group Software Product Company
- DYNA3D User's Manual Livermore Software Technology Corporation
- Sturt R.M.V. Walker B.D. Miles J.C. ‘Modeling the Occupant in a Vehicle Context- An Integrated Approach.’ Oct. 1991
- Khalil T. Lin T. C. ‘Hybrid III Finite Element Dummy Development and Validation’ 38th STAPP Car Crash Conference 1994
- Khalil T. Lin K.H. ‘Hybrid III Thoracic Impact on Self-Aligning Steering Wheel by Finite Element Analysis and Minisled Experiment,’ 35th STAPP Car Crash Conference Proceeding, SAE 912894
- Fredriksson L. A. Nilsson L. ‘An Advanced Finite Element Data Base of the Hybrid III Test Dummy: Phase 1 Model Generation and Sled Test Validation’ SAE 940558
- Shelke E. Remensperger R. ‘Integrated Occupant-Car Crash Simulation with the Finite Element Method:The Porsche Hybrid III Dummy and Airbag Model,’ SAE 910654
- Harry G. ‘Measurement of Hybrid III Dummy Properties and Analytical Simulation Data Base Development,’ Feb. 1988