Design and Fabrication Factors for the Fatigue Assessment of Welded Structures
|
Publication type
Author(s)
Antti Ahola
Post-doctoral researcher
Mechanical Engineering
LUT School of Energy Systems
Laboratory of Steel Structures
Lappeenranta
Research areas
Mechanical Engineering
Mechanics of Materials
Biography
D.Sc. (Tech.) Antti Ahola works as Post-Doctoral Researcher in the Laboratory of Steel Structures. His primary area of expertise is the fatigue strength of welded joints but he also works in different topics related to the joints and components made of steel and has active role in teaching. High-strength and ultra-high-strength steels are in the primary focus of the research. His research activities aims to find best practice for the fatigue design of welded structures and components, providing comprehensive understanding of fatigue failure mechanisms in welded joints and thus enabling accurate assessments of life cycle of structural components. In this context, the 4R method, including residual stresses, material strength, weld toe quality and load conditions as quantitative parameters, is the principal approach.
Ultra-high-strength steels (UHSSs) can provide significant weight reduction in steel structures and thus enable energy-efficient solutions for advanced structural applications. From the design viewpoints, one main concern in welded UHSS materials is the fatigue strength capacity as an increase in the yield/ultimate strength of material does not necessarily contribute achieving high fatigue strength unless post-weld treatments are introduced. In this regard, the characterization of fatigue strength properties is of paramount importance. On the other, an important step for the efficient use of UHSS materials is to have appropriate and comprehensive fatigue assessment methods considering the parameters influencing the life cycle of welded structural components. My research interests are closely related to these aspects - to understand the fatigue mechanisms in welded UHSS components, and to develop novel and comprehensive fatigue design methods for assessments, not forgetting the close collaboration with and impact on engineering world with practical solutions.
2021 - present Experimental Research of Welding and Structures, Associate Lecturer
2020 - present Steel Structures I (in Finnish), Lecturer
2018 - present Applications for FE-method for Steel Structures, Assistant
2018 - 2019 Applications for FE-method in Mechanical Engineering, Assistant
2017 - 2018 Scientific Research of Welding and Structures, Associate Lecturer/Assistant
2015 - 2019 Steel Structures II, Assistant
2015 - 2019 Steel Structures I (in Finnish), Associate Lecturer/Assistant
2013 - 2014 Strength of Materials I (in Finnish), Assistant
2013 - 2014 Statics (in Finnish), Assistant
2012 - 2013 Physics (L) (in Finnish), Assistant
2020 - present Steel Structures I (in Finnish), Lecturer
2018 - present Applications for FE-method for Steel Structures, Assistant
2018 - 2019 Applications for FE-method in Mechanical Engineering, Assistant
2017 - 2018 Scientific Research of Welding and Structures, Associate Lecturer/Assistant
2015 - 2019 Steel Structures II, Assistant
2015 - 2019 Steel Structures I (in Finnish), Associate Lecturer/Assistant
2013 - 2014 Strength of Materials I (in Finnish), Assistant
2013 - 2014 Statics (in Finnish), Assistant
2012 - 2013 Physics (L) (in Finnish), Assistant