hmewrk_05_sol

# hmewrk_05_sol - Solution Homework#5 Springback 2.008 Design...

This preview shows pages 1–2. Sign up to view the full content.

Solution Homework #5: Springback 2.008 Design and Manufacturing II Spring 2004 Out: March 31 st Due: April 07 th Problem 1 As demonstrated in class, springback is a problem which must be addressed when bending sheet metal. It occurs because there is always an elastic regio0n (albeit, sometimes very small) within the sheet which wants to return to its original state after the bending operation. The springback of the bent sheet can be approximated using the expression R Y 3 R Y R i = 4 i 3 i + 1 (1) R f ET ET where, as shown in Figure 1, R i and R f are the initial and final bend radii, Y is the yield strength and E is the elastic modulus of the metal, and T is the thickness of the sheet. As illustrated in Figure 1, the main effects of springback are that the final radius of curvature is larger than the initial radius and the final bend angle, α f , is smaller than the initial angle, α i . One approach to compensate for springback is to overbend the part (i.e., bend the sheet more than you want,

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

View Full Document
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