This text investigates the application of variational principles to solve complex problems in the fields of elasticity and plasticity. Kyuichiro Washizu, a prominent researcher in aeronautical engineering, synthesizes the mathematical foundations of energy methods to provide a rigorous framework for structural analysis. The book serves as a comprehensive reference for engineers and physicists seeking to apply these principles to solid mechanics.

Experts recognize this work as a foundational text for graduate-level study in solid mechanics and aeronautical engineering. Readers frequently note the high level of mathematical density and the rigorous, formal nature of the derivations presented throughout the chapters.