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Impacts of recycled carbon fibre and glass fibre as sustainable raw materials for thermosetting composites
(Lappeenranta-Lahti University of Technology LUT, 2022-09-23)
The fibre-reinforced polymer composites were implemented in various applications as a potential alternative to traditional metals. In particular, the carbon fibre-reinforced polymer (CFRP) and glass fibre-reinforced polymer ...
Research on key technologies of snake arm maintainers in extreme environments
(Lappeenranta-Lahti University of Technology LUT, 2022-12-19)
The China Fusion Engineering Test Reactor (CFETR) is a major international scientific project to solve the problem of providing the ultimate energy source for mankind. The safe and stable operation of the test reactor ...
Value creation in manufacturing industry based on the simulation
(Lappeenranta-Lahti University of Technology LUT, 2022-12-09)
Digitalization and globalization challenge companies to remain competitive to survive. Digitalization is disrupting traditional business models and reshaping organizational structures but also offering new opportunities ...
Fatigue performance and the effect of manufacturing quality on the uncoated and hot-dip galvanized ultra-high-strength steel laser cut edges
(Lappeenranta-Lahti University of Technology LUT, 2022-11-30)
Fatigue performance is a key issue in weight critical applications. In this study, the effect of local surface characteristics influenced by laser cutting, hot-dip galvanizing (HDG) and stress concentration factors, is ...
Laser powder bed fusion of steels : case studies on microstructures, mechanical properties, and notch-load interactions
(Lappeenranta-Lahti University of Technology LUT, 2022-11-10)
Additive manufacturing has evolved over the last few decades from utilising a prototyping approach to favouring a fabrication method. Consequently, this technology has become recognised as a potential replacement for ...
Fast and accurate simulation of fluid power circuits in the presence of small volumes using advanced methods and models for numerical stiffness elimination
(Lappeenranta-Lahti University of Technology LUT, 2023-06-02)
The modeling and simulation of fluid power systems are essential parts of the real-time simulation of virtual prototypes of mobile working machines. In several cases, in the dynamic simulation of such fluid power systems, ...
Laser and hybrid welding of high-strength structural steels
(Lappeenranta-Lahti University of Technology LUT, 2023-06-02)
Laser and laser-arc hybrid welding processes are recognized as key joining methods in many industrial fields such as light and heavy machinery, ship-building and the automotive industry. In the early days of laser welding, ...
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 ...
Assessment of weld root fatigue strength of load-carrying fillet welded joints using notch stress approaches and finite element analysis
(Lappeenranta-Lahti University of Technology LUT, 2023-11-21)
This thesis uses nominal and notch stress concepts to evaluate the fatigue strength of loadcarrying fillet welded joints (LCFWJs) made of high-strength steel. The study investigates the effect of different reference radii ...