Module 3 - Design of Mechanical Elements
Chapter 10: Mechanical Springs
Chapter 10 Overview
Chapter 10 covers the following key concepts:
- Stresses in helical springs
- Spring materials
- Critical frequency of helical springs
- Fatigue of helical compression springs
Lecture 17A
In case you missed it, here's a video of the first part of Lecture 17. In this video, we explore the fundamentals of mechanical springs.
Lecture 17B
In case you missed it, here's a video of the second part of Lecture 17. In this video, we dive deeper into helical compression springs.
Lecture 17C
In case you missed it, here's a video of the third part of Lecture 17. In this video, we continue our deep dive into helical compression springs, covering (i) what happens when a spring "goes solid," and (ii) how to predict and prevent spring buckling.
Lecture 17 Tasks
In this lecture, we will learn about the design of mechanical springs.
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Read
- Sections 10.1-10.6 of Shigley's Mechanical Engineering Design.
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Watch
- Spring Manufacturing Plant: See how springs are made.
- Hot Wound Spring for Sub-sea Oil and Gas: See how really big springs are made.
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Practice
- Problems 10-10 from Shigley's Mechanical Engineering Design, and then review the solutions posted.
Lecture 17 Notes
- Lecture 17 Notes[pdf]
Lecture 18A
In case you missed it, here's a video of the first part of Lecture 18. In this video, we explore the materials used to make mechanical springs.
Lecture 18B
In case you missed it, here's a video of the second part of Lecture 18. In this video, we look at how we can predict that a spring might fail due to fatigue.
Lecture 18C
In case you missed it, here's a video of the third part of Lecture 18. In this video, we explore the critical frequency of a compression spring and discuss how we can avoid resonance.
Lecture 18D
In case you missed it, here's a video of the fourth part of Lecture 18. In this video, we go through an example of fatigue analysis for a helical spring.
Lecture 18 Tasks
In this lecture, we will learn about fatigue failure of helical compression springs.
- Read
-
Watch
- Valve spring 8500 rpm: Watch a high-speed video of a spring experience surge inside an 8500 rpm engine.
- Valve Spring Dynamics and Failure: Watch another high-speed video of a spring experience surge without the strobe light effect.
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Practice
- Try taking Practice In-Class Quiz 5, to prepare for Thursday's In-Class Quiz.
- After you're done, see how you did by comparing your answers to the Practice In-Class Quiz 5 Solution.
- Problem 10-22 from Shigley's Mechanical Engineering Design, and then review the solutions posted.
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Complete
- Lecture 18 Quiz, due Thursday, March 20 at 11:59 PM.
Lecture 18 Notes
- Lecture 18 Notes[pdf]
Lecture 19: In-Class Quiz #5
We will have In-Class Quiz #5 today, and our second exam on Thursday, March 27. Here’s how you can best prepare:
- Review the Exam 2 Information page - It contains all the details you need to know for exam day.
- Familiarize yourself with the Exam 2 Equation Sheet - This will be provided with the exam (you cannot bring your own).
- Flip through the Exam 2 Review Slides - These cover all exam topics and include extra practice problems.
- Take the Practice Exam 2 under test conditions - Use only the Exam 2 Equation Sheet, your crib sheet, and a calculator.
- Check your answers with the Practice Exam 2 Solution to see where you need to improve.
- Use past quizzes to study - The exam will include both multiple-choice and problem-solving questions similar to Lecture Quizzes and In-Class Quizzes. Make the most of your study time, and let me know if you have any questions!
In-Class Quiz 5
Exam 2 Review Materials
Exam 2
- Exam 2[pdf]