practice_quiz2

# practice_quiz2 - MASSACHUSETTS INSTITUTE OF TECHNOLOGY...

This preview shows pages 1–3. Sign up to view the full content.

MASSACHUSETTS INSTITUTE OF TECHNOLOGY DEPARTMENT OF MECHANICAL ENGINEERING CAMBRIDGE, MASSACHUSETTS 02139 2.002 MECHANICS AND MATERIALS II SPRING, 2003 PRACTICE QUIZ II Distributed : Wednesday, April 28, 2004 This quiz consists of four (4) questions. A brief summary of each question’s content and associated points is given below: 1. (15 points) This is the credit for your (up to) two (2) pages of self-prepared notes. Please be sure to put your name on each sheet, and hand it in with the test booklet. You are already done with this one! 2. (15 points) A lab-based question. 3. (20 points) A set of 4 short, straightforward questions about plasticity. 4. (50 points) A longer problem on fatigue crack growth and fracture. The last 2 pages of the quiz contain “useful” information. Please refer to these pages for equations, etc., as needed. If you have any questions about the quiz, please ask for clarification. Good luck!

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Problem 1 (15 points) Attach your self-prepared 2-sheet (4-page) notes/outline to the quiz booklet. Be sure your name is on each sheet. Problem 2 (15 points) (Lab Problem) A strip of 2024-T4 aluminum alloy is 3 mm thick and 30 mm wide. Material properties for the alloy include E = 70 × 10 3 M P a , ν = 0 . 3, and σ y = 300 M P a . The strip is to be bent over a solid circular cylindrical die of radius “ R ”. Answer the following questions: ( 5 points ) What is the smallest value the radius “ R can have so that the strip of 2024-T4 aluminum fully springs back to its original shape after having been wrapped around the die? ( 5 points ) The aluminum strip is bent around a die having outer radius R = 30 mm .
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern