During this week, the RIVETECH team discussed the process of fabrication of the test specimen that will be used to perform the tensile test in the CIMATEC Senai Mechanical Assay laboratory. This test consists of subjecting a specimen of defined geometry to an increasing axial stress, causing it to break. The accomplishment of this test will allow the team to obtain information related to the capacity that aluminum used for the project will have to support the requests applied to the structure of the riveted joints.
Therefore, the following options were designed for the manufacture of the test specimen, which will be measured according to the ASTM E8M technical standard governing the manufacture of metal test specimens:
Option 1: Obtain a circular section test body through the machining process of an aluminum block.
Option 2: Manufacture a cast test specimen using a green sand mold.
Option 3: Cut the test specimen in a rectangular section on a recycled aluminum panel.
After a conversation with our supervisor, Prof. Guilherme Souza, it was decided that the best option for the manufacture of the test body would be by Option 2, due to the greater approximation of the mechanical properties of the fused test body with the rivet that will also be manufactured by casting. Therefore, we made the 3D CAD models of the test piece in a circular section format that will be manufactured through the casting process, the technical drawings (Image 1) and the mechanical drawing (Image 2) of the specimen.
Image 1: Technical drawing of the specimen
Source: Own
Image 2: Mechanical drawing of the specimen
Source: Own
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