This blog post explores how mechanical engineering influences daily life, diverse industries, and societal development—beyond simply building cars.
This blog post aims to explain mechanical engineering. First, let’s address common misconceptions about it. People often vaguely think mechanical engineering is about learning how to build cars or studying the principles behind how machines work. But this is only half true. Now, try to guess the common thread among the various items I’m about to present! First, the computer I’m using to write this document contains DRAM semiconductors, a source of pride for Korea. On the streets, people hold smartphones in their hands, and cars wait patiently at traffic lights. Beyond the shop windows in the bustling district, mannequins stand dressed in the latest fashions, while next door at the Apple Store, people relax in comfortable chairs listening to music on their iPods. The Starbucks across the street is bustling again today! Baristas are busily brewing coffee at the espresso machines.
Did you find the common thread in what I mentioned? Surprisingly, all these things are deeply connected to mechanical engineering. First, to make a car body, sheet metal must be pressed into shape using dies and press machines. When designing these dies, one must know what form makes the car most aesthetically pleasing and minimizes air resistance. To create the various internal components, metal parts must be machined using numerous tools, and when building an engine, calculations are needed to determine the most efficient design approach. For DRAM semiconductors and smartphones, while the semiconductor principles and smartphone software are handled by electrical engineering and physics majors, the actual production falls to mechanical engineers. Deciding which machining methods to use and the sequence of processes to maximize mass production efficiency is precisely the mechanical engineer’s job.
Even seemingly unrelated items like traffic lights, espresso machines, and clothing require mass production using mechanical engineering to be successfully commercialized. For instance, while the Industrial Revolution was made possible by James Watt’s steam engine, Britain’s textile industry couldn’t have advanced without the spinning machines powered by that steam engine. Thus, mechanical engineering is not merely the study of specific machines like automobiles or the principles behind how machines operate. Mechanical engineering is about creating various products to transform human life, grounded in an understanding of mechanics. The four major branches of mechanics—thermodynamics, solid mechanics, fluid mechanics, and dynamics—form the foundation and essential knowledge of mechanical engineering. However, the goal of mechanical engineering is not merely understanding this knowledge, but actually creating useful products. That is why this discipline is called mechanical engineering, not mechanical science.
Looking at the diverse applications of mechanical engineering, we can see how complex engineering processes are involved in creating products we commonly encounter in daily life. For example, electric motors used in home appliances may seem simple, but their design process is highly complex. To enhance motor efficiency, principles of electromagnetics and thermodynamics must be applied, while solid mechanics is utilized to reduce vibration and noise. Furthermore, optimizing mass production processes in factories requires a deep understanding of manufacturing processes and automation systems. The role of the mechanical engineer is crucial throughout all these stages.
Now, let me explain the subjects taught in the Department of Mechanical Engineering at Seoul National University. The four major mechanics courses mentioned earlier are taught in the first and second semesters of the second year in the Department of Mechanical Engineering at Seoul National University. Think of each course as a more detailed exploration of the mechanics covered briefly in general physics. You will learn about the properties of solids and fluids (liquids and gases) at rest or in motion, along with their thermodynamic characteristics. A key characteristic of these courses is that a strong foundation in physics and mathematics is essential for thorough comprehension. Meanwhile, the mechanical engineering program also includes many courses directly related to product manufacturing. In the first year of university, students take Mechanical Drafting and Creative Engineering Design. In the third year, they study Design, Manufacturing, and Practical Training. In these courses, students conduct design projects in teams or build robots or products directly based on the design knowledge they’ve learned. In these courses, practical skills for making things and teamwork are arguably more important than mathematical or physical knowledge. Therefore, it can be said that the Mechanical Engineering Department teaches both engineering knowledge and the practical skills needed when entering an actual company.
In particular, cultivating creative problem-solving abilities is extremely important in mechanical engineering. Students gain practical experience through diverse projects, learning to analyze problems from multiple angles and seek solutions. For example, when researching ways to improve a car engine’s fuel efficiency, students must comprehensively apply knowledge from thermodynamics, fluid mechanics, materials engineering, and other fields. Through this process, students develop the creativity and analytical skills needed to solve real-world problems, going beyond merely learning theory.
Next, let’s discuss career paths for mechanical engineering students. Given the field’s deep connection to everyday life, many find employment in companies after graduation. While few jump straight into the workforce after undergraduate studies, many pursue graduate school, complete master’s or doctoral degrees, and then secure positions as researchers. Often, they enter industries directly related to machinery, such as automotive, heavy industry, steel, and shipbuilding. Additionally, in recent years, it’s not uncommon to see graduates entering fields like finance or consulting. Given Korea’s export-driven economy centered on manufacturing, an understanding of mechanical engineering seems to be quite useful in these sectors as well.
Furthermore, some students pursue medical school to research medical devices or pass the patent attorney exam to become patent attorneys specializing in mechanical patents. A major advantage of mechanical engineering is that nearly every field in modern society is connected to machinery, making employment prospects relatively secure. Moreover, mechanical engineering is actively converging with other disciplines. For instance, mechanical engineering knowledge plays a significant role in fields like biomedical engineering and robotics. These convergent fields offer mechanical engineering graduates even more diverse career paths and will play a crucial role in leading new industries of the future.
I’ve explained mechanical engineering up to this point. I’d like to conclude by emphasizing its importance. What is the biggest difference between manufacturing in countries like Germany and Japan and manufacturing in Korea? Electrical or electronic technology? No. The most significant difference lies in the history and level of mechanical engineering between Germany and Korea. Mechanical engineering is not a field driven solely by theory. As it is responsible for the actual manufacturing of products, extensive experience and know-how gained from producing many real products are crucial. Even when manufacturing a single automotive part, the precision of that part can vary greatly depending on the level of accumulated mechanical engineering expertise. In a vehicle like a car, which contains tens of thousands of parts, the cumulative effect of such differences can lead to enormous variations in quality. In other words, the level of advancement in mechanical engineering is directly linked to a nation’s competitiveness. Therefore, for Korea to develop into an advanced nation on par with Germany or Japan, it must first further advance mechanical engineering, which forms the foundation for other engineering disciplines. Young people, let’s major in mechanical engineering!
