Researchers Qualify 3D Printed Aerospace Brackets and use Thermoelastic Stress Analysis for Testing
3D printed aerospace brackets made from titanium alloys are becoming more common in the design of spacecraft and satellites. Any aerospace component, however, cannot just be 3D printed and stuck onto the spacecraft – it must be tested and qualified to make sure that its mechanical behavior, among other qualities, is acceptable. In a study entitled “Non-Contact Measurement Techniques for Qualification of Aerospace Brackets Made by Additive Manufacturing Technologies,” a team of researchers undertakes a feasibility study of the Thermoelastic Stress Analysis (TSA) on a titanium alloy space bracket made by Electron Beam Melting.
The researchers developed a methodology that they implemented on a titatium based-alloy satellite bracket. They first designed a test bench for TSA. In order to define possible deviations between the expected and actual mechanical behavior, they compared TSA results with a Finite Element Analysis evaluated on the CAD model.
They extracted significant interrogation lines in order to gain more sensitivity about the stress trends.
The results of the analysis showed the same trends at larger scales, but smaller unexpected peaks in the TSA data and in the evaluated FEM, due to the particular micro and macro conformation given by the 3D printing process.
Authors of the paper include G. Allevi, M. Cibeca, R. Fioretti, R. Marsili, R. Montanini and G. Rossi.
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November 29, 2018 at 02:51PM