Smart Materials and Structures: Artificial Intelligence, Digital Engineering, Intelligent Infrastructure and Emerging Technologies presents a comprehensive exploration of the technologies transforming conventional engineering into Smart systems. Integrating materials, mechanics, Artificial Intelligence, and Digital Engineering, the book provides a practical framework for designing, analyzing, and commercializing next-generation smart products. The book covers spectrum of smart materials, including piezoelectric, shape memory alloys, magnetostrictive materials, electroactive polymers, smart fluids, nanomaterials, and metamaterials. It explains their fundamental principles, sensing and actuation mechanisms, computational modeling, and engineering applications across industr. Emerging technologies such as Digital Twins, Edge AI, intelligent sensing, predictive maintenance, and autonomous engineering are presented. A distinguishing feature of this book is its Novel case studies developed using Digital Engineering. These practical examples demonstrate the complete innovation journey-from concept and virtual prototyping to optimization, validation, and commercialization-enabling readers to develop their own intelligent engineering solutions.Written for students, researchers, practicing engineers, and technology innovators, this book bridges theory and practice, providing the knowledge and inspiration to engineer safer, smarter, and sustainable technologies for the future.