Katie VanHoozier

Project 2

The design process

1. Define the Problem:  You must design and construct a crane that will hold the greatest amount of weight before failing.

2. Brainstorm: In engineering journal.

3. Research and Generating Ideas:

• http://www.imath-asia.com/assets/index.php/quanser/3dof-crane/

• http://www.billcaid.com/2007/CraneAssembly20070203/CraneAssembly20070203.htm

• http://www.bushman.com/index.php/content/below_the_hook/jib_cranes

• http://www.azosensors.com/article.aspx?ArticleID=203

• http://www.inmycommunity.com.au/news-and-views/local-news/Giant-crane-appears-unable-to-take-the-strain-/7608297/

4. Identifying Criteria and Specifying Constraints:

Criteria-

• The crane boom must attach to the provided tower.

• A one-quarter inch (1/4”) hole will be used to mount the crane to the tower.

• All joints must be glued (no mechanical fasteners).

• The crane may not touch the tower during testing.

• Counterweights are allowed, but they may not be adjusted during testing.

• The boom must hold the weight fourteen inches (14”) from the tower center.

• The maximum length of the boom is twenty inches (20”).

• A mechanism/member must be provided at the end of the crane to attach a hook which will be used to hold the test weight.

• The crane must be the structure which holds the weight.

• Using the least amount of material and holding the most amount of weight…WINS!

• 2 different Full-Scale Drawings With Gusset Plates on Them

Constraints-

• Time

• Space

5. Exploring Possibilities

 

 

6. Select An Approach

 

 

7. Develop a Written Design Proposal

 

 

8. Make Model/Prototype:  (Full Scale Drawing)

 

 

9. Test and Evalutate: We used 2(J)=M+3 to see if our designs were stable or not. These are the 15 problems for the 15 sketches I made.

1. 2(20)=28+3     2. 2(8)=12+3      3. 2(21)=30+3       4. 2(8)=13+3      5. 2(14)=26+3      6. 2(8)=11+3   7. 2(10)=17+3   8. 2(9)= 15+3

      40 = 31 X        16 = 15 X             42 = 33 X              16 = 16                28 = 29 X              16 = 14 X             20 = 20              18 = 18

9. 2(9)=15+3      10. 2(18)=26+3   11. 2(5)=9=3         12. 2(7)=12+3   13. 11(2)=20+3    14. 2(8)=11+3    15. 2(9)=16+3

     18 = 18                  36 = 29 X             10 = 12 X             14 = 15 X              22 = 23 X             16=14X               18 = 19 X

 

10. Refine/Improve: To improve my sketches I will resketch some, but even if they arent equal, they might be sturdy just not as sturdy as possible. So I will probably use the most strudy ones I have and choose from there.

 

11. Create/Make Model

 

 

12. Communicate Results