Postdoc position: Remaining grease life model for rolling bearings

30 Jan 2024
Job Information

Organisation/Company

University of Twente (UT)

Research Field

Technology

Researcher Profile

Recognised Researcher (R2)

Country

Netherlands

Application Deadline

25 Feb 2024 - 22:59 (UTC)

Type of Contract

Temporary

Job Status

Not Applicable

Hours Per Week

40.0

Is the job funded through the EU Research Framework Programme?

Not funded by an EU programme

Is the Job related to staff position within a Research Infrastructure?

No

Offer Description

The goal of this 2-year project is to develop a model that makes it possible to determine the remaining grease life based on oil content, bleed properties, oxidation and rheology of grease samples taken from bearings that have been running in test rigs at SKF. This requires a thorough understanding of Elasto-Hydrodynamic Lubrication (EHL), thin film lubrication properties of oils, and grease lubrication mechanisms. Given the nature of the project, it has a strong focus on theory and model development.

Bearings are the most widespread machine elements after nuts and bolts. There are more than 50 billion bearings operating in the world at any time. 80-90% of bearings are grease lubricated. The reliability or life of a grease lubricated bearing is dominated by the quality of the lubricating film that separates the rolling elements (balls or rollers) from the rings. Important properties of the film are the thickness and ‘lubricity’. Unlike oil lubrication in which the contacts are fully flooded, grease lubricated contacts are often ‘starved’ (with no lubricant in some regions of the contact). The film thickness is the result of a mass balance between supply to- and loss of oil from the contacts. Lubricity is related to the frictional properties, which may change due to lubricant polymerization.

Job description

For this project, we are looking for a Postdoc candidate with relevant expertise. The main task of the candidate is to develop the remaining grease life model. The main result of the model should be the quality of the lubricating film as a function of time. For this, it combines the technology/science of contact mechanics (kinematics, heat development, EHL), physics of complex fluids (oil separation, capillary flow, evaporation) and degradation.

This project is connected to several other running (PhD)projects from which results should be translated into models.

Although the centre is located at the University of Twente, it is possible to perform part of the work at SKF Research and Technology Development in Houten, The Netherlands

Requirements
Specific Requirements

You :

• hold a BSc + PhD degree in Mechanical Engineering or (Applied) Physics with excellent results. Experience in modelling in the field of lubrication or tribology is an advantage.
• have good knowledge and demonstrated awareness of modelling using Python and/or MATLAB;
• have a strong analytical mind, an eye for detail, and a critical attitude towards assessment of experimental results;
• have strong written and verbal communication skills. Proficiency in English is required, both spoken and written. You need to provide IELTS test results (minimum score 6.5) or TOEFL-iBT (minimum score 90). The latter is not necessary for native speakers of English or whose MSc program was in English.

Additional Information
Benefits

• A 2 year postdoc position
• We provide excellent mentorship and a stimulating research environment with excellent facilities.
• Gross salary, depending on experience: ranging from € 3.877,- to € 5.090,- per month.
• A holiday allowance of 8% of the gross annual salary and a year-end bonus of 8.3%.
• A solid pension scheme.
• Minimum of 29 holidays per year in case of fulltime employment.

Additional comments

For more information, please contact Prof.dr.ir. Piet M. Lugt : [email protected] .

We invite applications from candidates who recently obtained their PhD degree or expect to graduate soon.

Interested after reading this vacancy? Applications should include the following documents:

• Curriculum vitae.
• Letter of motivation and/or research interest.
• List with grades of courses from both Bachelor’s and Master’s degrees.
• IELTS or TOEFL score
• A brief description of the PhD project
• References and, if applicable, a list of publications.

Please submit your application before 25th February, 2024 using the “Apply now” button.

The selection procedure includes an interview and scientific presentation.

The first round of interviews are scheduled for 5th March, 2024.

Website for additional job details

https://www.academictransfer.com/337129/

Work Location(s)

Number of offers available

1

Company/Institute

Universiteit Twente

Country

Netherlands

City

Enschede

Postal Code

7522NB

Street

Drienerlolaan 5

Geofield

Where to apply

Website

https://www.academictransfer.com/en/337129/postdoc-position-remaining-grease-li…

Contact

City

Enschede

Website

http://www.universiteittwente.nl/

Street

Drienerlolaan 5

Postal Code

7522 NB

STATUS: EXPIRED