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Master Thesis: Adhesive joint fatigue

Job Description

Date: Dec 2, 2019

Background

Outdoor telecommunication equipment is becoming more common due to the tighter base station grid needed in 5G high frequency networks, primarily driven by the US market. This densification requires smaller products and more advanced radome antenna materials, transparent to electromagnetic radiation. One way of integrating the radome to the product is by using adhesives. The adhesive joint has the potential of eliminating parts and keeping the product size small. One challenge with adhesives is determening life expectancy of the joint due to thermal fatigue.

 

Thesis Description
The main goal is to determine the requirements for the adhesive joints. The thesis outcome will be used within Ericsson to physically test, simulate and verify new concepts for future products. 
The thesis will include a combination of literary research, physical testing and FEA simulations. As such you will have a free role in how to plan the way forward within the thesis project. A starting point could be using the temperature profile data available within Ericsson. When the requirements are found, a suitable test method shall be proposed. As a second step the test method can be evaluated on existing products at the Ericsson test facilities. 


Necessary equipment not available within Ericsson should be identified and purchased or designed and manufactured.


Equally important is to accurately simulate the life expectancy of the adhesive joints and to find a good correlation between simulation results and physical testing. To do this you will work with finite element software such as ANSYS Mechanical. You will create suitable material models and simulation strategies based on damage-build-up in adhesive joint models and delamination simulations based on various load scenarios such as low- and high cycle thermal fatigue.
 

Qualifications
This project is aimed at students within the field of Mechanical Engineering or similar. 
Extent: 1-2 students, 30hp each
Location: Ericsson AB, Kista, Stockholm, Sweden
Preferred Start Date: January Febuary 2020
Keywords: 5G, Mechanical Design, Concealment, Wireless Telecommunication, Electronics outdoor enclosures, FEA, ANSYS, Fatigue prediction, Physical testing & verification

 

Application
Your application should include the following documents:
•    Your CV
•    A short letter explaining the motivation of your interest to apply for this position
•    Transcripts of studies
•    Any additional certificates (if not academic) regarding relevant experience. 
 
Are you interested?
The application deadline is the 15th of December. The selection process will be ongoing, and we will let you know as soon as we can if you move forward to the next step.
For questions, please contact Recruiter Richard Tjong at richard.tjong@ericsson.com.

 

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Ericsson complies with applicable country, state and all local laws governing nondiscrimination in employment in every location across the world in which the company has facilities. In addition, Ericsson supports the UN Guiding Principles for Business and Human Rights and the United Nations Global Compact.

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Ericsson expressly prohibits any form of workplace harassment based on race, color, religion, sex, sexual orientation, marital status, pregnancy, parental status, national origin, ethnic background, age, disability, political opinion, social status, veteran status, union membership or genetic information.

 

Primary country and city: Sweden (SE) || || Stockholm || R&D

Req ID: 308382