Document Type

Undergraduate Project

Date of Degree Completion

Spring 2024

Degree Name

Bachelor of Science

Department

Engineering Technology

Committee Chair

Charles Pringle, PE

Second Committee Member

Dr. John Choi

Third Committee Member

Mr. Chris Berkshire

Abstract

The objective of this project was to design, construct and test an articulating balsa wood bridge. It needed to fit certain requirements such as maintaining the bridge structure and articulation structure weight under 85g, being able to articulate 140mm, and be able to withstand a load of 20kg at the middle. The aim was to both create a product, but also give the student a chance to demonstrate their practical knowledge in engineering and going through the processes.

To complete this project as mentioned the student began by creating an initial design and performing a series of analyses on the components. This determined whether or not the bridge would fit the necessary minimum requirements. Other design processes were followed such as using decision matrices to determine the best process to use for manufacturing components. With the design completed, manufacturing could commence, involving creating components and final bridge assembly.

After completing testing of the bridge, it preformed as designed. It was able to withstand the required load of 20kg before fracturing down the middle of the bridge where the beams were at the most stress. It was also able to fully articulate 140mm at reasonable speeds and maintain the 140mm articulation for 10 seconds. The bridge also fit the design weight and dimension specifications. It was determined that the bridge was successful in meeting the requirements of the project, fitting all the necessary requirements while maintaining low costs and easy manufacturability.

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