The present work is concerned with the numerical simulation of the wheel-rail contact by the finite element method. The target of the investigation is the crossing nose of a turnout. A general approach to calculate the stresses and strains in the contact zone at a detailed level is developed. Subsequent analyses of the fatigue behavior are enabled by the use of fine meshes. In the modeling global and local modeling levels are coupled. ABAQUS/Explicit is used to calculate the dynamic response of the system in a global model. Alternatively the multibody system software GENSYS is consulted. Different quasi-static and static submodels are developed in ABAQUS/Standard to determine the very local stress state in the contact zone. An assessment of several methods for calculating contact pressure in wheel-rail contact reveals their application range. Combinations of multiple traveling velocities, crossing geometries and materials are simulated. Cyclic calculations demonstrate the behavior of crossing during repeated wheel passages. A damage indicator concept for ductile materials is implemented to indicate the onset of damage.
Modeling of wheel-rail/crossing interactions
Modellierung der Rad-Schiene/Kreuzungswechselwirkung
2007
110 Seiten, 57 Bilder, 12 Tabellen, 90 Quellen
Hochschulschrift
Englisch
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