In case of contact between two colliding bodies various force interactions in the contact area occur. The application of the method of multibody dynamics to the simulation of impact scenarios can be an appropriate tool in the development process of a barrier system. The virtual power for contact zones has to comprise impulse or contact in normal direction and friction in tangential direction of the common plane depending on the way of relative movement. With the method of multibody dynamics the effect of varying types of vehicles, impact angles, impact velocities and barrier system properties could be casily investigated. Consequently, the mode of operation could be optimized in advance, and the number of necessary full-scale tests could be reduced. Within this paper a sophisticated algorithm for the description of the virtual power in contact zones is presented. Hence, the implementation of this algorithm to the MEPHISTO (Multibody Systems with ElasticPlastic HInges and changeable STructure Organization) multibody program code is successfully proved in the particular case of vehicle impact on a safety barrier system. Several numerical calculations of vehicle impact scenarios on steel safety guardrails have been carried out recently using the MEPHISTO program, showing a good agreement to experimental crash data.
Plastic deformation of steel safety guardrails
Plastische Verformung von Sicherheitsleitplanken aus Stahl
2001
10 Seiten, 11 Bilder, 1 Tabelle, 13 Quellen
Conference paper
English
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