Work in progress — 2D paper trusses as a mechanism for teaching K12 fundamental STEM topics

Louisiana Tech University in partnership with three local high schools has recently developed NASA-Threads, a high school curriculum that integrates engineering, mathematics, and physics. The curriculum uses hands-on projects that develop student ability to solve realistic multiple-step problems and bring excitement into the classroom. One of the projects implemented in the “Work and Mechanics” portion of the curriculum involves the design, fabrication and testing of a two dimensional (2D) paper truss. Tensile truss members are made of dogbone-shaped manila folder strips, compressive specimens are made from paper mat board, and joints are held together with aluminum screw posts. The truss geometry and testing configuration ensure that the truss will fail when the most heavily loaded tensile member reaches its breaking strength. Tensile testing of individual members prior to the design process provides the data needed for students to design a truss whose load carrying capacity can be accurately estimated. The 2D paper trusses are easy to fabricate when compared to other paper or wooden trusses and provide an excellent way to introduce high school students to structural mechanics.