Sökning: "thermomechanical rolling"
Visar resultat 1 - 5 av 14 avhandlingar innehållade orden thermomechanical rolling.
1. Numerical simulation of thermomechanical rolling contact using an arbitrary Lagrangian-Eulerian formulation
Sammanfattning : In the endeavour to further the understanding of thermomechanical rolling contact, numerical simulations serve as an important complement to laboratory and full-scale testing. In the development of numerical simulation methods, the challenge is to enhance predictive capabilities while keeping computational efforts reasonable. LÄS MER
2. Numerical simulation of shape rolling
Sammanfattning : In the first part of this thesis, the FE program MSC.Marc is applied for coupled thermomechanical simulations of wire-rod rolling. In order to predict material behaviour of an AISI 302 stainless steel at high strain rates generated during wire-rod rolling, a material model based on dislocation density is applied. LÄS MER
3. Thermal impact on rolling contact fatigue of railway wheels
Sammanfattning : Rolling contact fatigue (RCF) is a very common and costly damage mechanism for rails and wheels. This thesis investigates the influence of combined thermal and mechanical loading on RCF of railway wheels on the basis of numerical predictions. LÄS MER
4. Numerical simulation of thermomechanically coupled transient rolling contact - An arbitrary Lagrangian-Eulerian approach
Sammanfattning : Numerical simulation of rolling contact serves as an important complement to laboratory and full-scale testing in the endeavour to further the understanding of related physical mechanisms, e.g. the influence of friction on the rolling motion, the thermomechanical interaction, damage phenomena and related modes of failure. LÄS MER
5. Towards enhanced mechanical braking systems for trains. Thermomechanical capacity of wheel treads at stop braking
Sammanfattning : Modern trains are equipped with different braking systems, between which the braking effort can be distributed. Among these, tread braking is still the most common system for friction braking. Tread brake systems are cheap and robust. LÄS MER