Fretting Wear, Fretting Fatigue and Damping of Structures

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

Auteur
Dr. Hattori has a Doctor of Engineering degree acquired in March 1976 and held significant roles at HITACHI Ltd. from 1976 to 2004, ultimately becoming a Chief Researcher. Subsequently, he served as a Professor at Gifu University (2004-2014) and Shizuoka Institute of Science and Technology (2014-2018). His work primarily focused on strength evaluation methods, reliability improvements, and the development of high-speed rotational discs using carbon fiber reinforced plastics, with applications in various industries including electronics and transportation.

Contenu

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.