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As part a cross-department initiative, the department of Engineering Mechanics announces a postdoc position within the thematic area Advanced Materials and Structures on the topic of Damage Modelling in Rolling Contacts.
In railways, wheel and rail maintenance is estimated to be 1/3 of the total operational costs. Maintenance actions are undertaken based on different degradation mechanisms such as profile variations due to wear, Rolling Contact Fatigue (RCF), or rail squats. Successfully addressing damage in wheels and rails is very valuable for ensuring safety, reducing waste, and rising operational availability of vehicles and tracks. This project aims at estimation of wheel and rail life by developing rolling contact damage models. To be successful, the modelling work needs to be based on relevant micromechancial damage mechanisms, which is only possible by using a high-fidelity constitutive relation. A physically sound modelling of material deterioration in the wheel-rail interface accounting for vehicle-track interaction will enable optimized maintenance strategies with minimal maintenance disruptions and material removal.
Rolling contact in railways has the particularity of linking effects of different length scales such as vehicle-track dynamics (macro-), contact mechanics (meso-) and damage mechanisms (micro-scale). In this project you will work with the development of the required constitutive models, determination of model parameters, and the connection of microstructural changes with macroscopic contact geometry. In the work you will be supported by the Rail Vehicles unit and the Solid Mechanics unit, with their respective expertise in vehicle dynamics simulations for wheel-rail damage prediction, and constitutive modelling, contact mechanics, and fatigue and fracture.
This position is one of eight postdoc positions in the thematic areas
Biomechanics, Health and Biotechnology
Advanced Material and Structures, Energy
Transport and Future Mobility, and
Advanced Computing and Machine Learning.
Read more about what it is like to work at KTH
Requirements
A doctoral degree or an equivalent foreign degree, obtained within the last three years prior to the application deadline (With some exceptions for special reasons such as periods of sick or parental leave, kindly indicate if such reason exists in your resume).
Preferred qualifications
Great emphasis will be placed on personal competency
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Your complete application must be received at KTH no later than the last day of application, midnight CET/CEST (Central European Time/Central European Summer Time).
The position offered is for, at the most, two years.
A position as a postdoctoral fellow is a time-limited qualified appointment focusing mainly on research, intended as a first career step after a dissertation.
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Disclaimer: In case of discrepancy between the Swedish original and the English translation of the job announcement, the Swedish version takes precedence.
Type of employment | Temporary position |
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Contract type | Full time |
First day of employment | According to agreement |
Salary | Monthly salary |
Number of positions | 1 |
Full-time equivalent | 100% |
City | Stockholm |
County | Stockholms län |
Country | Sweden |
Reference number | S-2021-0380 |
Contact |
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Published | 19.Mar.2021 |
Last application date | 15.Apr.2021 11:59 PM CEST |