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Dynamic analysis of flexible multibody systems using finite elements based on the absolute nodal coordinate formulation
(Lappeenranta University of Technology, 2018-10-19)
The computational analysis of mechanical systems has a wide array of applications and is therefore essential in many fields of modern industry. This dissertation studies the simulation of mechanical systems using the ...
Dynamic analysis of rotating systems including contact and thermal-induced effects
(Lappeenranta University of Technology, 2018-10-16)
Rotor dynamics is a special field of structural dynamics focusing on the study and analysis of rotating structures. Practical applications for rotor dynamics are found in typical industrial rotating electrical machine ...
Methods for lifecycle support of hydraulically actuated mobile working machines using IoT and digital twin concepts
(Lappeenranta-Lahti University of Technology LUT, 2019-10-25)
The Internet of Things and Digital Twins are popular but quite distant concepts nowadays. Many problems arise along the efforts of combining these concepts. This research work focuses on these problems and considers the ...
On weldability of thick section austenitic stainless steel using laser processes
(Lappeenranta-Lahti University of Technology LUT, 2019-10-25)
Laser welding and its different process variations using filler metal addition have increasingly become the preferred joining technology of the metal structure fabrication industry.
The essential characteristics of laser ...
Recognizing required changes to higher education engineering programs’ information literacy education as a consequence of research problems becoming more complex
(Lappeenranta University of Technology, 2018)
Challenges in the Earth’s sustainable development set requirements to modern engineering education. Engineers face complex problems, which need to be solved to keep the planet viable for future generations. This study was ...
Dependence of manufacturing parameters on the performance quality of welded joints made of direct quenched ultra-high-strength steel
(Lappeenranta University of Technology, 2018-09-29)
The use of ultra-high-strength steels (UHSS) has increased in the engineering industry during past decades especially in the fields of welded structural applications where products are required to possess a specific ...
Mechanical Design Guidelines of an Electric Vehicle Powertrain
(Lappeenranta-Lahti University of Technology LUT, 2019-02-01)
The tendency of alternating fossil energy sources with state-of-the-art renewable energy resources is spreading in most contemporary fuel consuming applications, and transportation, as one of the essential human needs, is ...
An experimental and theoretical investigation of power losses in planetary gearboxes
(Lappeenranta University of Technology, 2018-10-12)
Gearboxes based on planetary gear sets are preferred for their advantages, such
as higher gear ratios, improved self-centering capabilities, kinematic flexibility,
favorable bearing support conditions and higher power ...
Fiber laser and hybrid welding of T-joint in structural steels
(Lappeenranta University of Technology, 2018-12-14)
Laser welding processes are amongst the most versatile joining technologies, suitable for both, small scale and mass production. The advancements in laser sources and optics is allowing autogenous laser beam welding to ...
The Low-Cycle Fatigue of S960 MC Direct-Quenched High-Strength Steel
(Lappeenranta University of Technology, 2018-10-18)
Demanding strength, manufacturability and critical weight limitations are generally the main criteria in the design and fabrication of structural components. The emergence and development of ultra-high and high-strength ...