Written primarily to support a Junior-Senior level sequence of courses in Mechanical Engineering Design, this text takes the viewpoint that failure prevention is the cornerstone concept underlying all mechanical design activity. The text is presented in two parts, Part I--Engineering Principles, containing 7 chapters, and Part II--Design Applications, containing 13 chapters. Due to its organization, the text can also be conveniently used as the basis for continuing education courses or short-courses directed toward graduate engineers, as well as a reference book for mechanical designers engaged in professional practice.