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Contact modelling in multibody applications
(Lappeenranta-Lahti University of Technology LUT, 2021-10-08)
Multibody system dynamics (MSD) offers a reliable and easy-to-use tool to analyze the dynamics of complex systems. This approach allows for the description of equations of motion for a dynamic system that consist of ...
Design, development, and multi-objective optimization of robotic systems in a fusion reactor
(Lappeenranta-Lahti University of Technology LUT, 2022-04-08)
Fusion is the energy source of the sun and stars, and a fusion reactor is a machine to harness the fusion energy. The heat absorbed during the operation is used to produce steam, and then electricity just like a conventional ...
Simulation-based methods for fault estimation and parameter identification of rotating machines
(Lappeenranta-Lahti University of Technology LUT, 2022-03-25)
The vibration signature of a rotating machinery often indicates the condition of the machine. Faults and parameters of the rotating shaft, the bearings, and the support have a significant influence on the dynamics of the ...
Optimizing design and process parameters for recycled thermoplastic natural fiber composites in automotive applications
(Lappeenranta-Lahti University of Technology LUT, 2022-05-20)
Factors such as governmental legislation, environmental concerns, and curiosity amongst researchers are fueling the need to find novel applications for the utilization of recycled thermoplastic waste. One of the exciting ...
Finite element formulations for nonlinear beam problems based on the absolute nodal coordinate formulation
(Lappeenranta-Lahti University of Technology LUT, 2021-10-29)
The spatial simulation of highly flexible bodies is becoming more effective and feasible thanks to the current state-of-the-art in the development of advanced formulations and computer processors. This makes it possible ...
Stress components and local effects in the fatigue strength assessment of fillet weld joints made of ultra-high-strength steels
(Lappeenranta-Lahti University of Technology LUT, 2020-12-04)
Ultra-high-strength steels (UHSSs) enable a significant reduction in material usage compared to mild steels and, thus, provide energy-efficient solutions for structural applications. In welded steel components, an increase ...
Screening the critical locations of a fatigue-loaded welded structure using the energy-based approach
(Lappeenranta-Lahti University of Technology LUT, 2021-06-04)
Fatigue analysis is a very important part of the design process of a welded structure. Several different methods are available, but the principal challenge is the very large number of potential critical points in a complex ...
Study of key techniques in the vacuum vessel assembly for the future fusion reactor
(Lappeenranta-Lahti University of Technology LUT, 2020-12-14)
Effective use of fusion energy is one important way to maintain sustainable development for human beings. The China fusion engineering test reactor (CFETR) is a nextgeneration fusion experimental device planned for ...
Interaction and barrier properties of nanocellulose and hydrophobically modified ethyl(hydroxyethyl)cellulose films and coatings
(Lappeenranta-Lahti University of Technology LUT, 2021-03-31)
In food packaging applications, the oxygen barrier and resistance to oil and grease are essential properties of the packaging. The barrier performance of fibre-based packages needs to be improved with a coating, which is ...
Thermal analysis of dissimilar weld joints of high-strength and ultra-high-strength steels
(Lappeenranta-Lahti University of Technology LUT, 2020-06-30)
Advances in steel production processes in the last two decades have enabled the production of novel materials with improved strength, weldability and usability. Many industries are implementing these novel materials into ...