**About the Editors**

#### **Grzegorz Lesiuk**

Grzegorz Lesiuk is employed at the Wrocław University of Technology (Faculty of Mechanical Engineering) since 2009. He received his PhD in technical sciences (mechanics) in 2013 and habilitation (in mechanical engineering) in 2020. His scientific activities are related to mechanics, fracture mechanics and the fatigue of materials and structures, as well as new materials and modeling their durability under cyclic and static loads. He has published over 109 scientific papers in national and international scientific and technical journals and over 100 conference papers and 1 patent in this field. Currently, Prof. Lesiuk is a President of the Polish Fracture Mechanics Group. He is also a member of the Polish Society of Theoretical and Applied Mechanics and the ESIS (European Structural Integrity Society). He is the co-organizer of many international and national scientific events such as XXICMFM (International Colloquium Mechanical Fatigue of Metals), XVIII KKMP (National Conference on Fracture Mechanics), and the first VCMF (Virtual Conference on Fatigue of Metals). He has been repeatedly awarded for his scientific activities: he was admitted as a member of the Academy of Young Scientists and Artists operating at the President of the City of Wroclaw (Poland); he received a nomination from the President of the City of Wroclaw (2018), Rector's Award of Wroclaw University of Technology (2018, 2020), International ESIS Award—TC12 (Merit Award) 2019 and two international TOP 1% Reviewers (Publons and Web of Science) awards (2019); and a Lierati Award (2019)—Emerald Journals Group. In 2021, Professor Grzegorz Lesiuk was listed in the TOP2% cited researchers (prepared by Stanford University in cooperation with the Elsevier publishing company).

#### **Dariusz Rozumek**

Since 2021, Dariusz Rozumek has been a full Professor at the Department of Mechanics and Machine Design in the Faculty of Mechanical Engineering from the Opole University of Technology, following 28 years of research and teaching activity at the Opole University of Technology, Poland. His research interests lie in the area of multiaxial fatigue and fracture, including stress and energy approaches, welding and many other topics related to the field of mechanical engineering. He has published around 282 scientific papers, 11 patents, 8 book editions and 13 book chapters. He has participated in more than 11 European and National Projects. He is also a Guest Editor of several issues in various journals and a reviewer of articles in 25 journals. He has been awarded many times with the awards of the Rector of the Opole University of Technology. He has a medal from the National Education Commission.
