[MUSIC] Hi, and welcome back. In today's module, we will understand the different units of this course, and also understand critical techniques to succeed in this course. So this course is Machine Design. In other universities it is commonly referred to as component design, mechanical design, or mechanical systems design. The learning outcomes for the entire course or at the end of the course, you should be able to understand the impact of material properties, and the operating environment on various engineering designs. And also you should be able to apply fundamental engineering static, and fatigue analysis techniques to a wide variety of complex design problems. So there three major units in this course, the first unit is Material Properties in Machine Design and in this course we'll cover material properties such as the coefficient of thermal expansion. We'll look at a variety of tools for material selection such as Ashby plots. And we'll look at the impact of temperature and processing on material materials. Once you have a solid foundation in material properties, we'll move forward into Static Failures Theories. And now we'll quickly review stresses such as axial, torsion and bending stresses. And we'll learn two key static failure theories which is the Distortion Energy theory and the Brittle Coulomb Mohr theory. When you have a solid and fundamental understanding of static failure theories, we can move forward into Fatigue Failure Theories. And there we'll start with SN diagrams and then move into fluctuating stresses where you utilize Goodman criteria. And finally into variant fluctuating stresses with Miner's Rule. At the end of this course, you'll have a solid understanding of both static and fatigue failure theories, and you can move forward into future courses to look at specific machine components such as bearings, shafts, gears. So the initial part of the course, unit one, this material properties and design. We're looking to really strengthen your existing knowledge of material properties, and to build your technical intuition. It's going to be very qualitative, which is unusual for an engineering course. But really it's designed to build more connections and build a technical intuition. Then when we get into static failure theories, we'll transition from a very qualitative learning style to a very quantitive learning style. So there'll be a lot more equations and mathematical formulas. We'll strengthen you're existing knowledge of stress, but then we'll move into these new failure theories that you haven't seen before. And then finally, in fatigue, so for students who have just taken statics and then deformable bodies or solid mechanics. They've never touched on fatigue, so these will be an entirely new section of engineering for you guys to see. It will be very quantitative again, very equation based. And really, the key here is to understand when to utilize equations. So there'll be math, it won't be very difficult. But there'll be a lot of equations, and you have to understand when to use them. And again once you have a solid understanding of static and fatigue failure theory, you can go on and apply these theories to individual mechanical components. So the prerequisites for this course, it's critical that you successfully take in Statics and Solid Mechanics, which is also called Mechanics of Materials or Deformable Bodies. If you haven't taken these courses, there are excellent MOOCs on Statics and Mechanics of Materials on Coursera by Dr Whiteman. And keep in mind throughout this course, the units will be both English or imperial and metric. I realized for our international students that is a little confusing, but in America the imperial units are commonly utilized, and it's critical for American students to be able to use both units. So some tips to succeed in this course. One is to watch all the modules actively. Several times you'll see me end a module and I'll give you a problem. And it's critical that you attempt to work that problem as far as you can get, before watching the next module where I go through the solution. That way you can see where you get stuck, and what you're not understanding at this point. That same methodology should be done when you complete the worksheets. So there will be several worksheets of practice problems for you guys to utilize. It's a good idea to get as far as you can in the practice worksheet, and then check you work with the solutions. At the end of the week there will be a quiz, so you should take the quiz and check your understanding of the material. And obviously we ask that you would abide by all standards of academic honesty in the Coursera Honor Code. Keep in mind there's no textbook required for this course, but I will provide references that you guys can pick up if you desire, in the course materials. So, a few other tips to succeed. The main way to communicate with me and the TA for this course, is through the class discussion forum where you can post questions and post ideas. It's a great learning community and it consists of your TA, myself, and your peers. We ask that you use it to post well thought out questions and not straight solutions, but hints that you've, or areas that your struggling with. So please don't post quiz answers or solutions on the discussion forum. We ask that since the discussion forum is text, there's really no way to read emotion into text clearly. So work hard to make sure your messages are positive, constructive, and supportive so we can have a very open and supportive learning community there. So with that, the next module we'll start Unit 1, Material Properties in Design. And we'll start off by looking at strength. Then we'll get into Unit 2, which will be Static Failure. And finally we'll conclude with Unit 3, which is Fatigue Failure. So enjoy your learning experience in this course, and I look forward to seeing you next time. [MUSIC]