30 hp - Developing a FE method to simulate welding process

Sodertalje, Stockholm
den 7 oktober 2019
den 15 december 2019
Övriga jobb
Thesis project at Scania is an excellent way of making contacts for your future working life. Many of our current employees started their career with a thesis project.

Scania CV AB is constantly developing its methods in design and manufacturing in order to maintain its position as world leading manufacturer for heavy trucks and buses. The rise of new emission legislations are increasing the demands of robust and reliable aftertreatment systems to maintain its functionality throughout the vehicles lifecycle. The aftertreatment system is a complex welded component and its structural integrity is highly dependent on the customer applications which varies heavily depending on the market. Problem of distortion and residual stresses of the structure due to welding sometimes occur. Due to high costs of performing experiments it is desirable to identify deviations due to the welding process with simulations. Welding sheet metals, especially thin sheet plates, is a complicated process and many parameters have to be considered during the designing phase (before production). One of the most important facts to be considered is the deformation induced to the plates after welding. This deformation is thought to be caused by the generated temperature gradient during the welding process. These permanent deformations can cause tolerance related issues and residual stresses which decrease the lifetime of the component considerably.

To be able to predict these deformations, the welding process can be simulated by using finite element method. Since the welding process is a thermomechanical phenomenon, the finite element simulation will be a coupled model in which the thermal boundary condition can lead to mechanical deformation in the components.

To contribute to the method development for simulation of the welding process using the Finite Element Method.

  • Literature study of welding process simulation.
  • Create a simple finite element method to simulate a simple Butt joint.
  • Simulate a real case scenario and compare to the real production.

Basic courses in Finite Element Method. Advance courses have merit.

Master of Science in engineering mechanics, vehicle engineering, lightweight structures, welding mechanics, mechanical engineering or solid mechanics.

Number of students: 1
Start date: January 2020
Estimated time needed: 20 weeks

Contact persons and supervisors:
Tomas Hansson, phone: 08 - 553 723 84

Enclose CV, personal letter and course transcript

Scania is a world-leading provider of transport solutions. Together with our partners and customers we are driving the shift towards a sustainable transport system. In 2018, we delivered 88,000 trucks, 8,500 buses as well as 12,800 industrial and marine engines to our customers. Net sales totalled to over SEK 137 billion, of which about 20 percent were services-related. Founded in 1891, Scania now operates in more than 100 countries and employs some 52,000 people. Research and development are concentrated in Sweden, with branches in Brazil and India. Production takes place in Europe, Latin America and Asia, with regional production centres in Africa, Asia and Eurasia. Scania is part of TRATON SE. For more information visit:

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