This fact should be of utmost consideration when designing the legs of the structure. This is simply a continuation of the glue test. Install an antenna tube from F 2 through F 6. In the actual design, the glue will mostly be under shear, notably when used to ply several layers of wood together.
The final structure will consist of only balsa wood and glue, thus the choice of glue is a crucial decision. Tension Tests Results Specimen Strength psi 1 2 3 4 Specimens 3 and 4 were from a different batch of balsa and were thicker pieces in general, although thickness should have had no effect on maximum stress, it is assumed that the second batch simply has a greater density than the first one, or perhaps that it had not been affected by air humidity as much as the first batch.
The design presented in the this section, is likely to be similar the final model, however modifications may be needed for the final design that were unforeseeable at the time of this report. Come on, boys, and carry my bananas! Basic Design Code name: Maybe we can get some water up there.
I know you will love flying my Sky Bird. Now to discuss the initial design. Advanced Joint Testing Load was applied evenly along the horizontal section of the joint, creating a moment and vertical force at the joint.
Next, the specimen were tested under tension to determine which glue was the strongest. Included in the trial fit is making sure the stab is straight and level with the fuse and wings.
However the values obtained from these tests can give a general idea of where the structure may fail, and will display basic properties of the material.
Note that the bottom support piece is thick at the ends to encourage the self forming joints previous discussed, and since the bottom piece is believed to be subject to tension, the middle section is made thinner to cut down on material weight.
This fact should be of utmost consideration when designing the legs of the structure.
Where the load and stresses are known it would be best to form the plys in a unidirectional grain orientation, where the strongest orientation is used. This inaccuracy is due to limitations in the graphics package used for the figure.
Sand outside edges round. Check all the ribs to see if they fit over the spar and touch the bottom front sheeting. The finger joint is likely to have failed because it has the most area under shear force and as stated earlier, glue is weaker in shear than in normal stress.
I started flying the Sky Bird with a wood fuse and now have it on a glass fuse that is truly good looking, very strong, and cuts the building time.
This may be because the scarf joint has the highest amount of surface area that is glued. However, where the stresses are unknown it would be better to use a criss-cross pattern in the balsa plys to produce a strong, general purpose material in these regions.
Since the test of the design will be under compression, this data is very relevant for the final design. The three tests which ran the best were used for Table 2.Balsawood Structure Design Essay Examples.
5 total results. A Report on the Design, Construction, and Testing of Balsa Wood Structure. 2, words. 5 pages. An Analysis of the Balsawood Structure Design. 2, words. 5 pages. An Introduction to the First Stage of the Design, Construction and Testing of a Balsawood Structure.
2. Construction of the foundations is the first step toward building a bridge. This process involves detailed geotechnical investigations of the bridge site.
The type of bridge foundation has to be selected, such as the well foundation, pile foundation, and the opened foundation. As in the definition phase, once the design has been chosen, it cannot be changed in a later stage of the project.
Figure 3: Example: Global design for the DANS Architecture Archive In a young, very informal company, the design department was run by an artist. Balsa wood is available in inch and inch lengths from most local hobby supply stores, but for the quantities used for a class of over thirty students, it is best to either order the balsa wood.
The fourth stage of the construction process, called fieldwork, is the actual construction of the project. Fieldwork is broken down into building permits, subcontractors, scheduling subcontractors, shop drawings, project submissions, and change orders.
1. Introduction: This report is the first stage of the design, construction and testing of a balsa wood structure.
In April, the design will be tested against classmates' designs, where the design with the highest load/weight ratio wins.Download