This book provides comprehensive treatment of the nonlinear behavior of various types of structural elements such as beams, frames, trusses, mechanisms, plates, shells, and sandwich and composite structural elements. Information is included on the various types of nonlinearities, stress-strain relations and the development of nonlinear governing equations derived from nonlinear elastic theory. The author has designed the book to strike a good balance between the mathematical and applied side of the topic. Many applications, examples, and problems are presented in the text.