Today the stresses in rotating suspension components under physical load conditions are calculated with a assumed distributions of the contact forces between tire and wheel because the true distributions are not known. This causes uncertainties in the fatigue evaluation and requires an experimental verification of the attained results. The paper describes how the searched force distributions are derived from strains measured on wheels during rolling under load. The distributions of the contact forces derived by strain measurements on one passenger car wheel during rolling under different vertical loads with different tire pressures show only small differences when scaled to one resultant wheel load. In contrast the force distributions from tires of different height are as well similar but differ in their extreme values. Based on this results stresses in wheels under service loads can reliably be calculated for the first time. For the load case combined vertical and lateral wheel loads the situation is more complex. The identified force distributions do not allow a unification. It seems that forces which are not sufficiently observable till now affect the results so that relations between the identified force distributions of different tires are not definite. Therefore further evaluations are necessary. Nevertheless strains calculated by applying combined force distributions each taken from measurements of different wheel loads are in good agreement with measured strains.
Reliable stress calculation for rotating suspension components by identification of parametric tire models
2002
14 Seiten, 10 Bilder, 11 Quellen
Conference paper
English
Identification of parametric tire models for the fatigue evaluation of suspension components
Automotive engineering | 2003
|Identification of Parametric Tire Models for the Fatigue Evaluation of Suspension Components
SAE Technical Papers | 2003
|British Library Conference Proceedings | 2003
|Reliable pre-design of commercial vehicle rotating suspension components
Tema Archive | 2003
|