Machine Design Part I

About this course: “Machine Design Part I” is the first course in an in-depth three course series of “Machine Design.” The “Machine Design” Coursera series covers fundamental mechanical design topics, such as static and fatigue failure theories, the analysis of shafts, fasteners, and gears, and the design of mechanical systems such as gearboxes. Throughout this series of courses we will examine a number of exciting design case studies, including the material selection of a total hip implant, the design and testing of the wing on the 777 aircraft, and the impact of dynamic loads on the design of an bolted pressure vessel. In this first course, you will learn robust analysis techniques to predict and validate design performance and life. We will start by reviewing critical material properties in design, such as stress, strength, and the coefficient of thermal expansion. We then transition into static failure theories such as von Mises theory, which can be utilized to prevent failure in static loading applications such as the beams in bridges. Finally, we will learn fatigue failure criteria for designs with dynamic loads, such as the input shaft in the transmission of a car.

Who is this class for: This course is aimed at undergraduate students with an interest in machine design, as well as practicing engineers who want to want to enhance their mechanical design and analysis skills. If you are a practicing mechanical engineer who seeks to add to your knowledge of machine design, or an undergraduate student who wants additional learning opportunities out of your classroom, this course is for you.

Created by:  Georgia Institute of Technology

• Taught by:  Dr. Kathryn Wingate, Academic Professional

  Woodruff School of Mechanical Engineering

Level Intermediate Commitment This class includes 5 weeks of study, 5-7 hours/week. Language English Hardware Req none How To Pass Pass all graded assignments to complete the course. User Ratings 4.8 stars Average User Rating 4.8See what learners said Coursework

Each course is like an interactive textbook, featuring pre-recorded videos, quizzes and projects.

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Georgia Institute of Technology The Georgia Institute of Technology is one of the nation's top research universities, distinguished by its commitment to improving the human condition through advanced science and technology. Georgia Tech's campus occupies 400 acres in the heart of the city of Atlanta, where more than 20,000 undergraduate and graduate students receive a focused, technologically based education.

Syllabus


WEEK 1


Material Properties in Design



In this week, we will first provide an overview on the course's content, targeted audiences, the instructor's professional background, and tips to succeed in this course. Then we will cover critical material properties in design, such as strength, modulus of elasticity, and the coefficient of thermal expansion. A case study examining material selection in a Zimmer orthopedic hip implant will demonstrate the real life design applications of these material properties. At the end of the week you will have the opportunity to check your own knowledge of these fundamental material properties by taking Quiz 1 "Material Properties in Design."


11 videos, 4 readings, 1 practice quiz expand

1. Reading: Syllabus
2. Video: Module 1: Course Overview
3. Video: Module 2: How to Succeed in this Course
4. Reading: Consent Form
5. Video: Module 3: Strength
6. Practice Quiz: Complete prior to Module 4 - Modulus of Elasticity
7. Video: Module 4: Modulus of Elasticity - Introduction
8. Video: Module 5: Modulus of Elastricity - Applications
9. Video: Module 6: Ashby Plots
10. Reading: Total Hip Replacement Surgical Process:
11. Discussion Prompt: Design considerations for orthopedic implant
12. Video: Module 7: Material Selection in Hip Implant
13. Video: Module 8: Common Metals in Design
14. Video: Module 9: Metal Designations and Processing
15. Video: Module 10: Temperature Effects and Creep
16. Video: Module 11: CTE mismatch
17. Reading: Get from Georgia Tech

Graded: Material Properties in Design

WEEK 2


Static Failure Theories - Part I



In week 2, we will review stress, strength, and the factory of safety. Specifically, we will review axial, torsional, bending, and transverse shear stresses. Please note that these modules are intended for review- students should already be familiar with these topics from their previous solid mechanics, mechanics of materials, or deformable bodies course. For each topic this week, be sure to refresh your analysis skills by working through worksheets 2, 3, 4 and 5. There is no quiz for this week.


8 videos, 10 readings, 1 practice quiz expand

1. Practice Quiz: Pre-Quiz: Static Loading
2. Reading: Tip for Units 2 and 3: Equation Sheet
3. Video: Module 12: Review of Stress, Strength, and Factor of Safety
4. Reading: Example Problem Module 12 : Factor of Safety​
5. Video: Module 13: Factor of Safety Example
6. Reading: Solution Module 13: Factor of Safety
7. Video: Module 14: Axial and Torsional Stress Review
8. Reading: Example Problem Module 14: Axial and Torsional Stress
9. Video: Module 15: Axial, and Torsional Stress Example
10. Reading: Solution Module 15: Axial and Torsional Stress
11. Video: Module 16: Bending Stress Review
12. Reading: Example Problem Module 16: Bending Stress
13. Video: Module 17: Bending Stress Example
14. Reading: Solution Module 17: Bending Stress
15. Video: Module 18: Transverse Shear Review
16. Reading: Example Problem Module 18: Transverse Shear
17. Video: Module 19: Transverse Shear Example
18. Reading: Solution Module 19: Tranverse Shear
19. Reading: Earn a Georgia Tech Certificate/Badge/CEUs

WEEK 3


Static Failure Theories - Part II



In this week we will first cover the ductile to brittle transition temperature and stress concentration factors. Then, we will learn two critical static failure theories; the Distortion Energy Theory and Brittle Coulomb-Mohr Theory. A case study featuring the ultimate load testing of the Boeing 777 will highlight the importance of analysis and validation. Be sure to work through worksheets 6, 7, 8 and 9 to self-check your understanding of the course materials. At the end of this week, you will take Quiz 2 “Static Failure.”


9 videos, 12 readings expand

1. Video: Module 20: Ductile to Brittle Transition Temperature
2. Video: Module 21: Stress Concentration Factors
3. Reading: Worksheet 2: Stress Concentration Factor Practice Problems
4. Reading: Worksheet 2 Solution
5. Video: Module 22: Static Failure Theories
6. Video: Module 23: Distortion Energy Theory (von Mises Theory)
7. Video: Module 24: Simple Example Distortion Energy Theory
8. Reading: Example Problem Module 24
9. Video: Module 25: Complex Example Distortion Energy Theory
10. Reading: Solution Module 25: Complex Example Distortion Energy Theory
11. Reading: Worksheet 3: Practice Problems: Distortion Energy Theory
12. Reading: Worksheet 3 Solution
13. Video: Module 26: Case Study - Static Load Analysis
14. Video: Module 27: Brittle Coulomb Mohr Theory
15. Reading: Example Problem Module 27 Coulomb Mohr Theory
16. Video: Module 28: Brittle Coulomb Mohr Theory Example
17. Reading: Solution Module 28: Brittle Coulomb Mohr Theory
18. Reading: Worksheet 4: Practice Problems: Coulomb Mohr Theory
19. Reading: Worksheet 4 Solution
20. Reading: Tips for preparing for Quiz 2
21. Reading: Quiz 2 Solution

Graded: Static Failure

WEEK 4


Fatigue Failure - Part I



In week 4, we will introduce critical fatigue principles, starting with fully revisable stresses and the SN Curve. Then, we discuss how to estimate a fully adjusted endurance limit. Finally, a case study covering the root cause analysis of the fatigue failure of the Aloha Airlines flight 293 will emphasize the dangers of fatigue failure. In this week, you should complete worksheets 10, 11 and 12 as well as Quiz 3 “Fully Reversed Loading in Fatigue.”


8 videos, 10 readings expand

1. Video: Module 29: Introduction to Fatigue Failure
2. Video: Module 30: Fatigue and the SN Curve
3. Video: Module 31: Approximating the SN Curve
4. Reading: Worksheet 5: SN Curve Practice Problem​
5. Reading: Worksheet 5 Solution
6. Video: Module 32: Estimating the Endurance Limit
7. Reading: Example Problem Module 32: Estimating Endurance Limit
8. Video: Module 33: Estimating the Endurance Limit - Example Problem
9. Reading: Solution Module 33: Estimating the Endurance Limit
10. Reading: Worksheet 6: Endurance Limit​ Practice Problem
11. Reading: Worksheet 6 Solution
12. Video: Module 34: Fatigue Stress Concentration Factors Part I
13. Video: Module 35: Fatigue Stress Concentration Factors Part II
14. Video: Module 36: Fatigue Fully Reversed Loading Example
15. Reading: Worksheet 7: Fully Reversed Loading in Fatigue Practice Problems
16. Reading: Worksheet 7 Solution
17. Reading: Tips for preparing for Quiz 3
18. Reading: Quiz 3 Solution

Graded: Fully Reversed Loading in Fatigue

WEEK 5


Fatigue Failure - Part II



In this last week of the course, we will cover the fatigue failure criteria for fluctuating and randomly varying stresses, including key concepts such as the Modified Goodman line and Miner’s Rule. This week be sure to complete worksheets 13 and 14 as well as Quiz 4 “Fluctuating Fatigue and Miner’s Rule.” Finally, take Quiz 5, “The Comprehensive Quiz”, which will measure your overall knowledge of this course.


8 videos, 10 readings expand

1. Video: Module 37: Fatigue Case Study - Aloha Airlines Flight 243 Failure
2. Video: Module 38: Fatigue Fluctuating Stress
3. Video: Module 39: Fatigue Goodman Diagram
4. Reading: Example Problem Module 39
5. Video: Module 40: Fatigue Goodman Diagram Example
6. Reading: Solution Module 40
7. Video: Module 41: Fatigue Goodman Diagram Example (Life)
8. Reading: Worksheet 8: Fluctuating Loading in Fatigue
9. Reading: Worksheet 8 Solution
10. Video: Module 42: Randomly Varying Stresses and Miner's Rule
11. Reading: Example Problem Module 42
12. Video: Module 43: Randomly Varying Stresses and Miner's Rule Example 1
13. Video: Module 44: Randomly Varying Stresses and Miner's Rule Example 2
14. Reading: Solution: Example Problem Module 43
15. Reading: Worksheet 9: Miner's Rule
16. Reading: Worksheet 9 Solution
17. Reading: Quiz 4 Solution
18. Reading: Quiz 5 Solution

Graded: Fluctuating Fatigue and Miner’s Rule
Graded: Machine Design Part 1: Comprehensive Exam