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Team Members: Oscar Chahin, Steve Jean-Louis, Siri Amrit Ramos
Project Info:
Our strucure was designed specifically to attempt the maximum lift of the given weight. In order to do so, we had the choice of having the structure go through a small and adjacent hole, or a large but diagonal hole. We chose the smaller hole because we wanted to create a beam that was comprised of multiple trusses. This design was implemented in order to negate/minimize the deflections that were bound to occur due to the stress of the lifted weight. We felt as though we could create a more compact truss structure more effectively as opposed to a larger one that would waste far more material and require more supporting pieces in order to be just as effective.
Once we created the structure, we decided to add on a 4 ft T-beam lever arm that would actually be lifting the weight. This T-beam structure was utilized to increase the internal moment of inertia by placing a lot of material away from the neutral plane which would consequently lower the bending stress of the structure. The reason for the T-beamThe servo motor was placed right after the triangular trusses and would be attached to the lever arm at a specific angle (by eye) that allowed the weight to be lifted properly.
Unfortunately, due to the length of the lever arm our structure had to stop lifting once it banged the table. However, that the torque generated by the long lever arm coupled with the angular velocity of the servo motor was better suited than a lever arm that was much smaller and would not hit the table. This is due to the added weight on the back of our lever arm which serves as additional moment to help lift the weight.
Interesting Features:
A few interesting features include the I-beam lever arm, the triangular truss support beam, and the fact that our initial upward beam has very few supports due to our understanding that the stress from the weight would mainly be sent to the support structure.
Theoretical Predictions and Performance:
Pictures:
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This is art. |
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View along the T-beam |
Post Modernist art. |
Side view of T-beam |
Youtube Videos:
