an introduction to mechanical engineering pdf

This textbook is intended for students who are in the first or second years of a typical college or university program in mechanical engineering or a closely related field. Throughout the following chapters, we have attempted to balance the treatments of technical problem-solving skills, design, engineering analysis, and modern technology. The presentation begins with a narrative description of mechanical engineers, what they do, and the impact they can have (Chapter 1).

Seven “elements” of mechanical engineering are emphasized subsequently in Chapter 2 (Mechanical Design), Chapter 3 (Professional Practice), Chapter 4 (Forces in Structures and Machines), Chapter 5 (Materials and Stresses), Chapter 6 (Fluids Engineering), Chapter 7 (Thermal and Energy Systems), and Chapter 8 (Motion and Power Transmission). Some of the applications that you will encounter along the way include commercial space travel, 3-D printing, Boeing’s 787 Dreamliner, medical device design, nanomachines, internal combustion engines, robotics, sports technology, advanced materials, micro-fluidic devices, automatic transmissions, and renewable energy.

What should you be able to learn from this textbook? First and foremost, you will discover who mechanical engineers are, what they do, what technical, social, and environmental challenges they solve with the technologies they create. Section 1.3 details a “top ten” list of the profession’s achievements. By looking at this list, you will recognize how the profession has contributed to
your day-to-day life and society around the world in general.

Second, you will find that engineering is a practical endeavor with the objective of designing
things that work, that are cost-effective to manufacture, that are safe to use, and that are responsible in terms of their environmental impact. Third, you will learn some of the calculations, estimates, and approximations that mechanical engineers can perform as they solve technical problems and communicatetheir results. To accomplish their jobs better and faster, mechanical engineers combine mathematics, science, computer-aided engineering tools, experience,
and hands-on skills.

You will not be an expert in mechanical engineering after having read this textbook, but that is not our intention, and it should not be yours. If our objective has been met, however, you will set in place a solid foundation of problem-solving, design, and analysis skills, and those just might form the basis for your own future contributions to the mechanical engineering profession.