AVL MTC Motortestcenter AB offers a job in Sweden (SE) as

Thesis work - Bolt loosening prevention

The threaded fastener (bolt) is one of the most widely used type of fastener in powertrains. A proper bolted joint not only depend upon the assembly method and bolt position but also the design and quality of the bolt itself. Bolts are proven to self-loose due to external loads and vibrations if a proper design is not selected. If a bolt come loose, it can impair the function of the powertrain. There are methods to avoid self-loosening by using special kind of washers and/or applying Loctite to the threads but they have their own limitation. Therefore, the focus within this thesis work will be to understand the bolt loosening phenomena due to external loads/vibration and perform sensitivity analysis of it to the bolt design/dimensions, jointed material.

YOUR RESPONSIBILITIES:

What
The purpose of the thesis is to create 

• Guidelines for dimensioning of the bolt/bolted joint.
• Simple tool(s) to predict bolt failure due to preload loss.

How

• Conduct a literature survey and background investigation to understand the causes of preload losses in bolts.
• Develop a detailed FE model to investigate the preload loss by using DOE method.
• Identify/define equations and model to calculate the preload losses. 
• Define a method/process to recommend bolt dimensions for a specific application and align it with available test results.
• Document methods and process in a design guideline.

Tools 

• Abaqus, ANSA, MS Office

YOUR PROFILE:

• You are a M.Sc. student within mechanical engineering, vehicle engineering or engineering physics with a good understanding of modelling and simulations.

WE OFFER:

• Thesis work 2023/2024

Interested?
If so, please use our online application tool to send your application to AVL!

For more information please contact: 
Per Rosander        +46 (0) 70 1678260     per.rosander@avl.com 
Martin Schagerlind    +46(0) 70 1678219    martin.schagerlind@avl.com