Project: Bridge Building with 123D Design

thingiverse

It appears to be a lesson plan on designing and building bridges using 3D printing. The activities include: 1. Modeling strength test beams 2. Designing a Four-Point Connector 3. Designing a hexagonal connector 4. Designing an arc connector 5. Extension Activity: Design, Build, and Test a Bridge 6. Upcycled Structures with 3D printed connectors The lesson plan includes: **Step-by-Step Instructions** * Step 2: Modeling strength test beams - Measure the strength of balsa wood in tension. * Step 3: Design a Four-Point Connector - Use Primitives to build a four-point bridge connector and add a third connection point, then add a fourth connection point, save, export, and print your connector. Then see how to create a four-point bridge with multiple prints by printing individual components for different points. * Step 4: Design a hexagonal connector - Sketch and extrude a hexagonal prism and rectangular bar. Pattern the bar around all six sides of the hexagonal piece to create connectors, subtract the bars from the hexagonal piece to make holes and add strength with a chamfer tool. * Step 5: Design an arc connector- See video below, download design project.pdf, Sketch, and Extrude an arc-shaped object then Create and merge a double-arc shape, hollow out the four ends of the double-arc shape. * Step 6: Design Additional Connectors - Imagine new types of connectors that will help you design your bridge. **Activities** 1. **Step 2: Modeling strength test beams**: Use 123D Design to model a set of strength test beams. 2. **Designing and printing different bridge structures**: Let students create and print their own bridges using the skills they learned during these tutorials. 3. **Bridge Building Competition**: Let each student build one version, which can include more or less parts. **Skills Learned** * Engineering **Preparation** * Computers with 123D Design downloaded and installed * Balsa wood strips (1/8 x 1/8 in) or something similar (toothpicks or popsicle sticks) * Wood glue * Graph paper