• well-trained engineers can work well in other related fields； • have good written and oral communication skills； • have time-management skills； • have good “people skills”； • be adept at using computers to solve practical problems.
NOTE: the work of an engineer differs from that of a scientist.
Engineering serves as the bridge between scientific discovery, commercial application, and business marketing.
Basic knowledge: mechanics, kinematics, thermodynamics, materials science, and structural analysis.. Basic tools: computer-aided engineering and product lifecycle management
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Part 1: Introduction to Mechanical Engineering
1.1 Introduction 1.1.1 What is engineering?
Engineering is the practical and creative application of science and mathematics to solve problems. — Problem-solving One who practices engineering is called an engineer. An engineer is: an innovator, planner, and problem-solver of our society.
Machines Complicated machines Simple machines
Simple machines：
Nail clippers
Simple kitchen machines —a bottle opener
Complicated machines：
cars
excavators
1.1.2 Main branches of engineering
Chemical engineering Civil engineering Electrical engineering Material engineering Mechanical engineering
Figure 1.1 percentages of engineers working in various engineering fields
What is a machine?
• A combination of many interconnected parts • Perform desired work accompanied by desired motions
1.5 How to define and describe a machine? 1.5.1 Engineering Drawings Question: How a machine is described in engineering?
Mechanical engineering is a discipline of engineering that applies the principles of physics and materials science for analysis, design, manufacturing, and maintenance of mechanical systems. Mechanical engineering is all about making useful machines.
1.3 Common Traits of Good Engineers
• problem solvers； • firm grasp of the fundamental principal of engineering； • analytical, detailed oriented, and creative people； • lifelong learners；
• actively participate in professional meetings； • Good cross-culture on skills ；
1.4 What is a machine?
What is a machine?
Mechanical engineering is the second-largest field among the traditional engineering disciplines and is perhaps the most general.
1.2 Mechanical Engineering
According to Franz Reuleaux's description “A machine is a combination of resistant bodies, so interconnected that by applying force or motion to one or more of those bodies, some of those bodies are caused to perform desired work accompanied by desired motions.”