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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
STRUCTURAL STATIC ANALYSIS OF ACADEMIC ROCKET ENGINE USING 6061 ALUMINUM WITH AISI 1020 STEEL
Submission Author:
Alexandre Mateus Mendonça Bezerra , RN , Brazil
Co-Authors:
Alexandre Mateus Mendonça Bezerra, Ayesha Aires Rodrigues, Airton Felipe Soares Fernandes, Vinícius Dantas, Elder Silva, Victor Sousa, George Marinho
Presenter: Alexandre Mateus Mendonça Bezerra
doi://10.26678/ABCM.ENCIT2020.CIT20-0587
Abstract
The use of aluminum as material in rockets is favorable to weight reduction, which is an important factor in the aerospace area. However, the structural and thermal properties of aluminum leave something to be desired. Carbon steel, on the other hand, has a higher density and better structural and thermal properties. Numerical methods were used to perform the structural static analysis of an academic rocket engine called Poty G, designed for a 300 m apogee. The engine was dimensioned as having an aluminum envelope, with SAE 1020 steel nozzle. The maximum internal design pressure of 3 MPa was placed as the main contour condition, to a detailed analysis of the most critical region. von Mises stress, displacement and structural safety coefficient were analyzed using the Ansys AIM software. It was found that the displacement was negligible radially and of low value for the longitudinal direction, not representing a concern regarding the structural aspect. As expected, by means of static analysis using the von Mises criterion, it was possible to identify that the components had maximum stresses below the yield stress and the rupture stress of the respective materials, ensuring structural safety. It was possible to simulate an academic rocket engine, which uses different materials, managing to reduce the weight in relation to conventional ones, and still guarantee structural safety. Through the static analysis using the von Mises criterion, it was possible to identify that the components presented maximum stresses below the yield stress and rupture stress of the respective materials, guaranteeing structural security.
Keywords
structural analysis, rocket engines, Aluminium, 1020 steel, Numerical simulation
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