Difference between revisions of "Team F"

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(Added some brief descriptions and a list of some of the finalization steps. PLEASE add/write out pieces/revise/whatever.)
(Finalization)
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The team decided to base the final design primarily on Team Fα's preliminary design because it performed better with virtually the same volume. The main quality that we tried to incorporate into our new design was the use of triangles in the central region of the piece, between each of the notches. We also cut away the portions past the notches, like in Team FΩ's design.
 
The team decided to base the final design primarily on Team Fα's preliminary design because it performed better with virtually the same volume. The main quality that we tried to incorporate into our new design was the use of triangles in the central region of the piece, between each of the notches. We also cut away the portions past the notches, like in Team FΩ's design.
  
==Finalization==
+
==Design Development==
*Rearranging triangles
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Step 1 was to find the ideal arrangement and orientation of triangle cuts in the center of the arm.
**Orientation/direction
+
 
**Relative sizes
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Middle Bar Test 1
*The trapezoid and thing with a three-point arc
+
Displacement: .298
*Selective filleting of edges
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Volume: .95 in^3
**Not-so-selective filleting of edges if we add more?
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Score: .280
*Lightening holes
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*Anything else?
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Middle Bar Test 2
 +
Displacement: .2922
 +
Volume: .95 in^3
 +
Score: .277
 +
 
 +
Middle Bar Test 3
 +
Displacement: .2682
 +
Volume: .95 in^3
 +
Score: .255
 +
 
 +
Middle Bar Test 4
 +
Displacement: .2824
 +
Volume: .95 in^3
 +
Score: .268
 +
 
 +
Middle Bar Test 2 provided the lowest score and became the base model for the second step which was to cut out a substantial, trapezoidal section near the end where the force will be. An additional section was added near the larger cut as well.
 +
 
 +
Cut Test 1
 +
Displacement: .358
 +
Volume: .7 in^3
 +
Score: .250
 +
 
 +
Cut Test 2
 +
Displacement: .29
 +
Volume: .72
 +
Score: .209
 +
 
 +
Cut Test 3
 +
Displacement: .277
 +
Volume: .72
 +
Score: .199
 +
 
 +
Cut Test 3 provided the lowest score and was used as the base model for the third step which was to test different depths of shelling.
 +
 
 +
Shelling Test 1
 +
Displacement: .4195
 +
Volume: .50
 +
Score: .210
 +
 
 +
Shelling Test 2
 +
Displacement: .323
 +
Volume: .61
 +
Score: .197
 +
 
 +
Shelling Test 2 provided a better score; however, it was only marginally better than the score without any shelling a all. The small difference was still desirable, so Shelling Test 2 provided the base for the fourth and final step: lightening holes and filleting.
 +
 
 +
Lightening Holes and Filleting Test 1
 +
Displacement: .3339
 +
Volume: .59
 +
Score: .196

Revision as of 15:16, 26 September 2012

Members

Preliminary Designs

Team Fα

Team members: Isaac, Christine, Lindsay

  • Triangles
  • Description of design etc.

Team FΩ

Team members: Greg, Andrew The premise of Team FΩ's design was to do away with extraneous portions of the given design. The result was a curved, s-shape piece that cut off the portions past the pre-cut notches under the hypothesis that these areas did not help the piece resist deformation. The curved structure was intended to eliminate the corners created by the notches so that stress could not focus on any particular spot.

Synthesis of Designs

The team decided to base the final design primarily on Team Fα's preliminary design because it performed better with virtually the same volume. The main quality that we tried to incorporate into our new design was the use of triangles in the central region of the piece, between each of the notches. We also cut away the portions past the notches, like in Team FΩ's design.

Design Development

Step 1 was to find the ideal arrangement and orientation of triangle cuts in the center of the arm.

Middle Bar Test 1 Displacement: .298 Volume: .95 in^3 Score: .280

Middle Bar Test 2 Displacement: .2922 Volume: .95 in^3 Score: .277

Middle Bar Test 3 Displacement: .2682 Volume: .95 in^3 Score: .255

Middle Bar Test 4 Displacement: .2824 Volume: .95 in^3 Score: .268

Middle Bar Test 2 provided the lowest score and became the base model for the second step which was to cut out a substantial, trapezoidal section near the end where the force will be. An additional section was added near the larger cut as well.

Cut Test 1 Displacement: .358 Volume: .7 in^3 Score: .250

Cut Test 2 Displacement: .29 Volume: .72 Score: .209

Cut Test 3 Displacement: .277 Volume: .72 Score: .199

Cut Test 3 provided the lowest score and was used as the base model for the third step which was to test different depths of shelling.

Shelling Test 1 Displacement: .4195 Volume: .50 Score: .210

Shelling Test 2 Displacement: .323 Volume: .61 Score: .197

Shelling Test 2 provided a better score; however, it was only marginally better than the score without any shelling a all. The small difference was still desirable, so Shelling Test 2 provided the base for the fourth and final step: lightening holes and filleting.

Lightening Holes and Filleting Test 1 Displacement: .3339 Volume: .59 Score: .196