This book provides a comprehensive overview of the mechanical distinctions between fretting damage under axial or bending external forces and fretting damage under a torsional load. It emphasizes the importance of studying practical accident cases to efficiently acquire technical skills. The book is structured around the fundamental technologies of material science, tribology, and mechanics, which are vital for understanding and addressing technical issues. The author has incorporated all fretting countermeasure technologies, which were previously often sensory and empirical in nature, and repositioned them as technologies grounded in fundamental principles. The book proposes an economical approach to product operation that maintains reliability by integrating not only design technology but also maintenance practices. It delves into specific materials, such as titanium alloys and aluminum alloys, which have seen increased use for weight reduction in industries like aerospace. In this book, Critical Distance Stress Theory that can easily derive the fatigue limit and fatigue life of the stress singular field at the contact edge was presented. As a result, the fretting fatigue strength and life can be predicted from the same FEM stress analysis as the normal stress concentration part. And finally, introducing a novel fretting mechanical model, the book focuses on scenarios where pressure force (N) and repeated tangential force (F) are applied to two planar objects, with the tangential force being transmitted solely through friction at the contact surface. This model finds relevance in turbine blade connection structures, among other applications. The author references Asai's research example, which encompasses fretting mechanical analysis, fretting wear evaluation, fatigue assessment, and structural damping evaluation using this model.

Provides a comprehensive understanding of fretting damage, its mechanisms, and effective countermeasures Emphasizes the importance of studying practical accident cases to efficiently acquire technical skills References Asai's research example fretting mechanical analysis structural damping evaluation using this model

Autorentext
Toshio Hattori is Professor Emeritus of Gifu University. He obtained a Ph.D. from the Tokyo Institute of Technology. Hattori is a Fellow of the Japan Society of Mechanical Engineers and has received awards for his achievements in the Strength of Materials Division and the Mechanical Materials & Processing Division. His research focuses on strength and reliability design technology for rotating electrical machinery, including turbine generators and gas turbines. Hattori has contributed to education and research in material mechanics, plastic mechanics, industrial material science, plastology, industrial English, and thesis guidance. He is currently providing technical consultation and lectures to manufacturing companies and writing technical books. Tomohiro Naruse is a Professional Engineer (Mechanical) in Japan. He received his bachelor’s, master’s, and Ph.D. in mechanical engineering from Osaka University. Naruse has received the Japan Society of Mechanical Engineers Medal for New Technology and the High Pressure Institute of Japan Promotion Award for Science and Technology. He specializes in strength and reliability technology for products and equipment, and has been involved in research at the Mechanical Engineering Research Laboratory at Hitachi, Ltd. Naruse also participates in the research committee of the Japan Research Institute for Screw Threads and Fasteners.

Inhalt

1 Introduction.- Chapter 2. Case studies of fretting failures.- Chapter 3. The outline of fretting damage.- Chapter 4. Mechanical analyses of fretting wear and fretting fatigue.- Chapter 5. Application examples of fretting analyses on strength design of products.- Chapter 6. Fretting damage prevention technology.