Discover more about the topics and technologies to be discussed at this year's conference, via a series of exclusive interviews with a selection of our expert speakers
Jan Friederichs, research assistant and PhD student at the Institute for Automotive Engineering (IKA) and RWTH Aachen University, fills us in about his work on how dynamic tire footprints can help enhance and validate tire simulation.
Tell us about your research into dynamic tire footprints.
I work in the chassis department of the tire technology division and I’m currently working on a public project funded by the Deutsche Forschungsgemeinschaft (‘German Research Organisation’). The aim of the project is to provide fundamental research for the development of more permanent carriageways through a coupled consideration of the road-tire-vehicle-system. In contrast to chassis development, where forces and moments from the tire to the chassis are taken into consideration, here, the interaction between tires and road surfaces is investigated. Therefore, we need a tire model which has a validated tire contact patch behaviour over a full spectrum of driving manoeuvres.
In what ways have you found existing models to be lacking and how do dynamic tire footprints improve this?
At the Institute for Automotive Engineering (ika), we have access to a large variety of tire test rigs to investigate tire stiffness, transient behaviour, forces and moments during handling manoeuvres and more. With our own measured and validated data, we are able to parametrise detailed physical tire models such as FTire. For the parametrisation of these simulation models, we also use a capacitive pressure imaging sensor which generates data about the local ground pressure distribution at different wheel loads and camber angles for a non-rolling tire. The data provides the approximate tire contact patch dimensions for the tire model. Nevertheless, these static measurements cannot indicate local shear stress or ground pressure distribution for a tire rolling on an uneven road surface.