Analysis of the damage tolerance under the criterion of the elastic-linear fracture of the wing of a sports category aircraft. (lsa)
DOI:
https://doi.org/10.18667/cienciaypoderaereo.493Keywords:
Aircraft Structure, Aluminum Alloy, Crack Growth, Residual Life., Damage Tolerance Analysis, Finite Element Analysis, Non-Destructive Testing (NDT), Multiphysics SimulationAbstract
The following article presents a methodology for applying a Damage Tolerance Analysis to the wing structure of an LSA category aircraft. This study contemplates a CFD analysis in ANSYS Fluent where aerodynamic loads that work on the wing are calculated, followed by a structural resistance analysis in which an integration Fluid-Structure Interface is made to determine the maximum stresses supported by the structure using Finite Element (FEA) performed in ANSYS Workbench, an analysis of critical crack sizes on the primary elements of the structure and a residual life calculation of this elements in order to create NDT inspections intervals to ensure structural integrity of the aircraft wing.
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References
A.F. Grandt, Jr. and G.M. Sinclair (1972). "The Stress-Intensity Factors for Surface Cracks in Bending". Stress Analysis and Growth of Cracks Part 1, ASTM STP 513, pp. 37-58.
https://doi.org/10.1520/STP34112S
Albañil H. Héctor, Espejo M. Edgar Mecánica de fractura y análisis de falla. Editorial; Universidad Nacional de Colombia, Facultad de Ingeniería Departamento de Ingeniería Mecánica y Mecatrónica, Sede Bogotá -Colombia (2001)
D.S. Dawicke (1997). "Residual Strength Predictions using a Crack Tip Opening Angle Criterion". Proceedings of the FAA-NASA Symposium on the Continued Airworthiness of Aircraft Structures. DOT/FAA/AR-92/2, pp.555-566.
DTD Handbook, Damage Tolerance Testing, http://www.afgrow.net/ (2014)
P.R. Abelkis (1980). "Effect of Transport Aircraft Wing Loads Spectrum Variation on Crack Growth". Effect of Load Spectrum Variables on Fatigue Crack Initiation and Propagation. D.F. Bryan and J.M. Potter (Eds.). ASTM STP 714, pp. 78-134. Also see AFFDL-TR-78-134 (1978, November).
https://doi.org/10.1520/STP27487S
H. Liebowitz (1974). "Fracture Mechanics of Aircraft Structures". AGARD-AG-176, North Atlantic Treaty Organization, Advisory Group for Aerospace Research and Development.
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