As an applied science, engineering uses scientific knowledge to achieve a specific objective. The mechanism by which a requirement is converted to a meaningful and functional plan is called a design. The design is an innovative, iterative, and decision-making process. This book deals with the analysis and design of machine elements and basic structural members that compose the system or assembly. Typical truss, frame, plate, and shell-like structures also are considered. The purpose and scope of this text may be summarized as follows: It presents a body of knowledge that will be useful in component design for performance, strength, and durability; provides treatments of "design to meet strength requirements" of members and other aspects of design involving prediction of the displacements and buckling of a given component under prescribed loading; presents classical and numerical methods amenable to electronic digital computers for the analysis and design of members and structural assemblies; presents many examples, case studies, and problems of various types to provide an opportunity for the reader to develop competence and confidence in applying the available design formulas and deriving new equations as required.

The text consists of two parts. Part I focuses on fundamental principles and methods, a synthesis of stress analysis and materials engineering, that forms the cornerstone of the subject and has to be studied carefully. It begins with a discussion of basic concepts in design and analysis and definitions relating to properties of a variety of engineering materials. Detailed equilibrium and energy methods of analysis for determining stresses and deformations in variously loaded members, design of bars and beams, buckling, failure criteria, and reliability are presented in this part. Athorough grasp of these topics will prove of great value in attacking new and complex problems. Part II is devoted mostly to mechanical component design. The fundamentals are applied to specific machine elements such as shafts, bearings, gears, belts, chains, clutches, brakes, and springs and typical design situations that arise in the selection and application of these members and others. Power screws; threaded fasteners; bolted, riveted, and welded connections; adhesive bonding; and axisymmetrically loaded components are also considered in some detail. In conclusion, introductory finite element analysis in design is covered.

The full understanding of both terminology in statics and principles of mechanics is an essential prerequisite to the analysis and design of machines and structures. Design methods for members are founded on the methods of mechanics of materials; and the theory of elasticity is used or referred to in design of certain elements. The objective of this chapter is to provide the reader the basic definitions and process of the design, load analysis, and the concepts of solid mechanics in a condensed form. Selected references provide readily available sources where additional analysis and design information can be obtained.