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Global/Local FEM-BEM Stress Analysis of Damaged Aircraft Structures

A. Alaimo1, A. Milazzo2, C. Orlando3

Dipartimento di Tecnologie ed Infrastrutture Aeronautiche, University of Palermo, Palermo, Italy, e-mail: a.alaimo@unipa.it.
Dipartimento di Tecnologie ed Infrastrutture Aeronautiche, University of Palermo, Palermo, Italy, e-mail: alberto.milazzo@unipa.it.
Dipartimento di Tecnologie ed Infrastrutture Aeronautiche, University of Palermo, Palermo, Italy, e-mail: c.orlando@unipa.it.

Computer Modeling in Engineering & Sciences 2008, 36(1), 23-42. https://doi.org/10.3970/cmes.2008.036.023

Abstract

In this paper a Hierarchical approach for the analysis of advanced aerospace structures is presented. The proposed Global/Local model uses two kind of numerical methods. The first step of the Hierarchical procedure is performed by the Finite Element code Patran/Nastran\texttrademark , using a coarse mesh to study the global structure, then the local region is analyzed by using a Boundary Element code based on the multidomain anisotropic technique. This code accurately predicts stress concentrations at crack tips with a reduction of the modeling efforts and of the computational time. The Global/Local interface code implemented allows an intuitive extraction of the local region with a substantial reduction of the modeling time. The accuracy and the effectiveness of the model have been demonstrated analyzing classical stress concentration problems. Then the procedure has been used to analyze more complex structures among which a riveted patch repair, applied on a cracked panel, and a cracked graphite-epoxy curved panel with Z stiffeners and Z frames.

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APA Style
Alaimo, A., Milazzo, A., Orlando, C. (2008). Global/local FEM-BEM stress analysis of damaged aircraft structures. Computer Modeling in Engineering & Sciences, 36(1), 23-42. https://doi.org/10.3970/cmes.2008.036.023
Vancouver Style
Alaimo A, Milazzo A, Orlando C. Global/local FEM-BEM stress analysis of damaged aircraft structures. Comput Model Eng Sci. 2008;36(1):23-42 https://doi.org/10.3970/cmes.2008.036.023
IEEE Style
A. Alaimo, A. Milazzo, and C. Orlando, “Global/Local FEM-BEM Stress Analysis of Damaged Aircraft Structures,” Comput. Model. Eng. Sci., vol. 36, no. 1, pp. 23-42, 2008. https://doi.org/10.3970/cmes.2008.036.023



cc Copyright © 2008 The Author(s). Published by Tech Science Press.
This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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