Anderson, R.Long, A.Serre, T.2009-08-192009-08-192009Nonlinear Dynamics, 2009; 58(1-2):199-2080924-090X1573-269Xhttp://hdl.handle.net/2440/50530Multibody modelling of pedestrian collisions requires the definition of contact-impact between the pedestrian and the vehicle. An examination of relevant impact test data reveals large rate-dependent components of the reaction force, permanent indentation, and concomitant energy loss. Contact-impact models previously used in simulations of pedestrian impacts typically have not adequately modelled one, two or all three of these phenomena. This paper presents a phenomenological contact-impact model based on the Hunt-Crossley model of impact, which includes rate-dependent damping, and is extended to include permanent indentation. The proposed model suitably characterises impact test data in a form that can also be implemented in the multibody simulation code MADYMO (TASS-Safe, Netherlands). The proposed contact-impact model was used to characterise the impact between a legform and the bumper of a vehicle, based on two impact tests conducted at different impact speeds. A single contact-impact definition in MADYMO closely reproduced the dynamics of both tests. The proposed model may be suitable in a wide range of impact conditions where the impact is modelled using multibody techniques and it is practicable to conduct impact tests as part of the modelling process. © 2009 Springer Science+Business Media B.V.enPedestrianimpact modellingJournal article00200913502009081315571710.1007/s11071-009-9471-60002698851000142-s2.0-7034919680338400Anderson, R. [0000-0003-1306-6239]