Rodríguez-Sánchez, Alejandro E.
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Rodríguez-Sánchez, Alejandro E.
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Rodríguez-Sánchez, Alejandro Esteban
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Rodríguez-Sánchez, Alejandro E.
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Scopus Author ID
57202719691

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STRUCTURAL EFFECT OF STAGGERED COMPOSITE REINFORCEMENTS WITHIN THE FIREWALL OF AN AIRCRAFT

2019 , VICTOR ALFONSO RAMIREZ ELÍAS , Rodríguez-Sánchez, Alejandro E. , ELIAS RIGOBERTO LEDESMA OROZCO , HILARIO HERNANDEZ MORENO , ERIK VARGAS ROJAS , LUIS FERNANDO PUENTE MEDELLIN , LUIS DAVID CELAYA GARCIA

The performance of composite materials, such as high strength and low density, is ideal for aerospace applications. This paper presents the structural analysis of a component of a utility aircraft, the STELA M1. As this is still a prototype, the aim is to validate the resistance of its fuselage subjected first to static loads.

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ANÁLISIS ESTRUCTURAL DE UN CORTAFUEGOS CON REFUERZOS INTERNOS ESCALONADOS CON COMPUESTOS DE UN AVIÓN UTILITARIO

2019 , Victor Alfonso Ramirez Elías , Rodríguez-Sánchez, Alejandro E. , ELIAS RIGOBERTO LEDESMA OROZCO , HILARIO HERNANDEZ MORENO , ERIK VARGAS ROJAS , LUIS FERNANDO PUENTE MEDELLIN , LUIS DAVID CELAYA GARCIA

With the aim to validate the strength of one of the most critical areas of the utilitarian aircraft Stela M1, this work shows a structural analysis of the firewall with inner stepped reinforces “Doublers”, which it is subjected to maximum static loads from typical flight manoeuvres suggested by the standard FAR 23, specifically for assessing the interlaminar effects of the stepped reinforces. The piece, including the stepped reinforces, is made totally with laminated composite materials carbon fibre/epoxy and protected with a thin aluminium plate. It was simulated with a finite element model and validated with experimental data from a representative specimen subjected to the same operational conditions. From the results, it was observed, throughout the cross-section of the piece, that the first layers and the plate have a significant effect on the X and Y stresses, whereas the effect of the stepped reinforces at the layers near to the mid-plane were more evident for the XY shear stresses. Complementary, the highest Tsai-Wu index were located around the screw hole C and at the first carbon fibre layers and suggest a security factor of around 7, validating the piece. This study also shows that the stress concentrations around the stepped reinforces barely have a deleterious effect on the firewall. Moreover, the reinforces are suitable to significantly increase the structure strength and to keep the maximum stresses concentrated at the firewall reinforced areas.

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