An Efficient Sequential Approach for Simulation of Thermal Stresses in Disc Brakes
2012 (English)Conference paper (Other academic)
In this paper an ecient approach to simulate thermal stresses due to tem-perature variations in disc brakes is presented. In the approach thermal and stress analysis are performed sequentially. The frictional heat analysis is based on the Eulerian method, which requires signicantly low computational time as compared to the Lagrangian approach. The nodal temperature history is recorded at each time step and is used in a sequentially coupled stress analysis, where a temperature dependent elasto-plastic material model is used to compute the stresses in the disc brake. The results show that during hard braking, high compressive stresses are generated on the disc surface in circumferential direction which cause plastic yielding. But when the disc cools down, the compressive stresses transform to tensile stresses. Such thermoplastic stress history may cause cracks on disc surface after a few braking cycles. These results are in agreement with experimental observations available in the literature.
Place, publisher, year, edition, pages
IdentifiersURN: urn:nbn:se:liu:diva-94281OAI: oai:DiVA.org:liu-94281DiVA: diva2:631334
15th Nordic Symposium on Trbology, NORDTRIB,Trondheim, Norway, 12-15 June