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Finite Element Analysis of Occupant Restraint System Interaction with PAM-CRASH
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Sector:
Event:
Stapp Car Crash Conference
Language:
English
Abstract
A new approach in numerical occupant simulation using the dynamic coupling of the nonlinear explicit finite element code PAM-CRASH and the crash victim simulation program MADYMO has been validated and is presented.
The new technique combines the advantages of the finite element method for the solution of dynamic problems with large structural deformations with the merits of validated occupant models. It uses the full capabilities of both industrial programs PAM-CRASH and MADYMO, and is therefore well suited for an industrial environment. A description of the coupling method will be given in this paper.
The study to be presented investigates the interaction of a Hybrid III dummy and a passive restraint system consisting of an airbag and a kneebolster in a frontal impact situation. Both, the airbag and the kneebolster are discretized using finite elements; the dummy model consists of 20 rigid bodies with attached contact ellipsoids.
The inflation of the airbag and the structural deformation of airbag and kneebolster upon impact of the dummy are calculated by PAM-CRASH. The resulting impact forces and torques are used by MADYMO in the equation of motions of the occupant model to determine the kinematics and dynamic behaviour of the crash victim.
A comparison of numerical and experimental results is given. In addition, results of preliminary validation studies of the interaction of a free-flying impactor with the airbag, and of the impact of a pendulum into the kneebolster using the PAM-CRASH code, are shown.
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Authors
- Rainer Hoffmann - Engineering System lnternational GmbH Eschborn, Germany
- Dirk Ulrich - Engineering System lnternational GmbH Eschborn, Germany
- Jean-Baptiste Protard - Engineering Systems lnternational S.A. Rungis, France
- Harald Wester - Volkswagen AG Wolfsburg, Germany
- Norbert Jaehn - Volkswagen AG Wolfsburg, Germany
- Thomas Scharnhorst - Volkswagen AG Wolfsburg, Germany
Citation
Hoffmann, R., Ulrich, D., Protard, J., Wester, H. et al., "Finite Element Analysis of Occupant Restraint System Interaction with PAM-CRASH," SAE Technical Paper 902325, 1990, https://doi.org/10.4271/902325.Also In
References
- Haug, E. et al. 1986
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- Haug, E. Clinckemaillie, J. Aberlenc, F. “Contact-Impact Problems for Crash” “Post Symposium Short Course of the Second Intl. Symposium of Plasticity” Nagoya, Japan 1989
- Hoffmann, R. et al. “A Finite Approach to Occupant Simulation: The PAM-CRASH Airbag Model” SAE Paper 890754 March 1989
- Wismans, J. Hermans, J.H.A. “MADYM03D Simulations of Hybrid III Dummy Sled Tests” SAE Paper 880645 1988
- Hoffmann, R. Lasry, D. “Design for Passive Safety using Numerical Simulation Techniques” Proceedings of the 50th Anniversary Symposium Bioengineering Center Wayne State University Detroit Nov. 1989
- DAISY User Manual Version 4.5 1989
- Pletschen, B. “An Advanced 50th perc. Hybrid III Dummy Database: Validation” Second Intl. MADYMO User Meeting Noordwijk 1990