Explanation
This project was about building two types of trusses. The two trusses were already given to us. Although we needed to figure out a couple measurements. For example we need to calculate the angles of the truss and the lengths of the beams. once all calculations were done we drew exact replicas of the truss on paper. From there we went on to building them. using wood and super glue me and Kyle created the two trusses. we glued the first ones on the paper and constructed two more. These extras were going to be used in the test. The test was simply to see how much force was needed to create a failure in the two trusses.
Truss 1
graph
video of testing
efficiency evaluation
truss 1 calculations
Truss 2 calculations
conclusion questions
1- For the first truss the failure happen at the top of the truss. where the two beams meet. it happened there because that is where the load force was directly put. in result that part of the truss underwent the most stress. another factor of the failure occurring there is, is because during the construction part of the lab. Kyle and I couldn't find a wood glue to work. so to make up for that we used a super glue. although when the load was applied that type of glue might have not had the same bonding strength as the other glue. which leads to the failure occurring at the top of the truss. for the second truss when the load for was applied to the truss failure occurred at the middle of the top beam beam and at the bottom right joint. my calculations added up for the first truss showing the failure was a the point with the most stress. although my calculation didn't add up just right for the second truss.
2- first off for both trusses i would use a much more endurable glue and a stronger wood. as for the design, for the first truss i would add a beam directly down the middle of it. connect to the middle of the bottom bean to the joint at the top. with this when the load is applied there is a beam opposing its force directly instead of at an angle. in result it take tension and compression from the other beams. which leads to a larger load to create a failure. for the second truss i would add another beam within the square at the opposite angle of the original. in result when the load is added this time you have the resistance of 4 triangle instead of two. this help oppose the force of the load.