Jinyang Zheng Knihy

This monograph is the first to focus on ellipsoidal heads, widely utilized as end closures in pressure vessels across various industries, including chemical, petroleum, nuclear, marine, aerospace, and food processing. It thoroughly examines stress, failure, design, and fabrication aspects of these heads. The book delves into the buckling and plastic collapse behaviors of ellipsoidal heads through nonlinear finite element methods and extensive experiments involving 37 heads with diverse geometric parameters, materials, and fabrication techniques. Advanced measurement technologies, such as 3D laser scanning, are employed, particularly for large heads with diameters reaching 5 meters. It introduces new formulas for accurately predicting buckling and plastic collapse pressures. A novel failure mechanism-based design method is proposed, leveraging elastic-plastic theory, which allows for optimal load-carrying capacity and reduces thickness and costs compared to existing methods based on elastic or perfectly plastic theories. Additionally, the book addresses the control of fabrication quality, focusing on shape deviation, forming strain, and temperature. This work serves as a valuable technical reference for researchers and engineers in engineering mechanics, design, manufacturing, and industrial engineering.