Preliminary Design Review

What has been done in the past week

2D Moment

• Added zip ties to rigid body to easily clip on the lanyard strings

• Added stands to the pegboard

Truss Challenge

• Tested out different materials for connections (built 4 small bridges)

  • Decided on foam core circles

• Lasercutting acrylic parts for pin and rocker support (in progress in the design studio)

COM Challenge

• Produced multiples of all shapes in machine shop

  • Polyurethane foam cut with water jet

• Painted most of the shapes

• Wrote an answer key that calculated the COM of each shape

Reaction Box

• Finished printing and cutting final parts and adding strap

Buckling demo tool

• Created cross sectional areas and sent to Chris to test material blend

Vector Box

• Started preliminary design

• Bought some materials

Feedback from last meeting with sponsor

COM Challenge

• Assignment outline

  • Students first calculate COM

  • Then students make a stacked configuration using the physical shapes

  • Students will then calculate the COM of the final stacked configuration

• Use velcro to attach shapes together

Truss Challenge

• Foam core circle is good

• No glue for connections

• Acrylic lasercut supports are good

2D Moment

• Zip ties are good for connection

Buckling demo tool

• Add grid onto shapes

• Try to print longer length, more shapes

Ball with string

• Don’t want rope to break or tangle up in user’s hand

Report Feedback

• Document how to create our tools

  • Manufacturing process or where to purchase at the lowest cost

  • Need to document a step-by-step how to make so that other people can recreate the tools if they want to

  • Document what you’ve tried / what doesn’t work

  • Use pictures in the documentation

What is the next step of your project

Truss Challenge

• Need to figure out values for cost and environmental score for truss members

  • Build mini structures to test the difference in strength when using all wooden dowels, all lollipop sticks, and a combination of them

  • Use that info to figure out how to scale the other variables

• Rebuild a mock up of the analyzed design using the new connectors + acrylic supports to test how well the experiment aligns with calculations

COM Challenge

• Finish painting shapes

• Write assignment prompt

• Test various stacking configurations for stability

  • Try velcro

Buckling demo tool

• Decide on material blend and prepare different cross sectional areas

Vector Box

• Finalize design in Solidworks and AutoCAD

• Buy materials and send parts to machine shop

Questions for Sponsor/Instructor

• N/A