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High Power Fiber Laser Welding of Thick Section Materials – Process Performance and Weld Properties
(Lappeenranta-Lahti University of Technology LUT, 2019-11-27)
High power fiber laser systems have reached output powers far beyond 30 kW and a fiber laser source of 100 kW output power has recently become available for fundamental research. With the high laser power that is now ...
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 ...
Dynamic and thermal modeling of touch-down bearings considering bearing non-idealities
(Lappeenranta-Lahti University of Technology LUT, 2020-06-26)
In an active magnetic bearing (AMB) supported rotor, the touchdown bearings support the rotor in case of an electromagnetic field failure or a fault in the control system. In this work, a dynamic and thermal model of ...
Renewable-energy-based Single and Community Microgrids Integrated with Electricity Markets
(Lappeenranta-Lahti University of Technology LUT, 2019-11-22)
The deployment of renewable-energy-based microgrids in the electrical power system is a wellknown pathway to realize sustainable energy goals. Further, community microgrids incentivize residential houses to exchange renewable ...
Artificial intelligence : a modern approach to increasing productivity and improving weld quality in TIG welding
(Lappeenranta-Lahti University of Technology LUT, 2021-07-29)
Recent years have seen the welding industry facing demands for improved productivity and efficiency together with simultaneous enhancement of the quality of welded structures. The welding industry has met these challenges ...
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 ...
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 ...
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 ...
Numerical ductile fracture assessment of weldments in direct-quenched, ultra-highstrength steel
(Lappeenranta-Lahti University of Technology LUT, 2023-12-01)
Many studies conducted in recent years have raised concerns about the ultimate loadcarrying and elongation capacities of weldments made of direct-quenched, ultra-highstrength steels (UHSS). The reason for this is the ...
Dynamic analysis and parameter identification for robotic manipulators
(Lappeenranta-Lahti University of Technology LUT, 2023-11-20)
This paper presents a comparative advanced study on parameter identification and dynamic analysis of lightweight and heavy-duty robotic manipulators. The ultimate goal is to enhance the performance and control of these ...